JP6887889B2 - Radiation therapy system and treatment time management device - Google Patents

Description

Embodiments of the present invention relate to a radiotherapy system and a treatment time management device.

In radiotherapy, radiation may be irradiated from a plurality of irradiation angles such as four opposed gates. In this case, the irradiation is performed in the irradiation order empirically determined by a radiation medical technician or the like, or in the irradiation order itself taken from the treatment planning device. When rotating the irradiation head portion to a certain irradiation angle, it may be necessary to bypass the mechanical origin angle instead of the shortest path due to the mechanical limitation of the gantry. In such a case, more time will be spent rotating the gantry than expected by a radiologist or the like. Due to these factors, it is difficult to predict the treatment time including the gantry rotation time before performing radiotherapy.

Japanese Unexamined Patent Publication No. 2008-178569 Japanese Unexamined Patent Publication No. 2011-194066

The problem to be solved by the invention is to present an accurate treatment time to a radiological technologist or the like before performing radiotherapy.

The radiotherapy system according to the present embodiment includes a treatment planning unit that generates treatment planning data for a patient to be treated, a treatment pedestal that rotatably supports an irradiation unit that irradiates therapeutic radiation, and the treatment pedestal. A calculation unit that calculates the estimated rotation time of the treatment pedestal required for movement between the plurality of irradiation gates based on the rotation speed and the irradiation angles of the plurality of irradiation gates included in the treatment plan data, and the treatment unit. It is provided with a display unit for displaying the estimated rotation time of the gantry.

FIG. 1 is a diagram showing a configuration of a radiotherapy system according to the present embodiment. FIG. 2 is a diagram showing the appearance of the radiotherapy apparatus and the imaging apparatus of FIG. FIG. 3 is a diagram showing an example of a rotation speed table included in the interference simulator of FIG. FIG. 4 is a diagram showing an example of a working time table included in the treatment time management device of FIG. FIG. 5 is a diagram showing a typical processing flow of the radiotherapy system according to the present embodiment. FIG. 6 is a diagram showing an example of calculation of the rotation prediction time performed in step S2 of FIG. FIG. 7 is a diagram showing another example of calculation of the estimated rotation time performed in step S2 of FIG. FIG. 8 is a diagram showing an example of calculation of the estimated rotation time in consideration of the mechanical limitation of the movable range of the gantry, which is performed in step S2 of FIG. FIG. 9 is a diagram showing an example of a display screen of the treatment prediction time and the interference check result displayed in step S4 of FIG. FIG. 10 is a diagram showing an example of a display screen of the elapsed time and the completion status displayed in step S7 of FIG. FIG. 11 is a diagram showing an example of a display screen displayed in step S7 of FIG. 5 in which the predicted treatment time and the actually measured treatment time are displayed in parallel. FIG. 12 is a diagram showing an example of a display screen for displaying moving flows in parallel according to the present embodiment. FIG. 13 is a diagram showing an example of another display screen for displaying the movement flow in parallel according to the present embodiment. FIG. 14 is a diagram showing a display screen for displaying work items, treatment prediction time, and work prediction time together with a boost button according to the present embodiment. FIG. 15 is a diagram showing a display screen according to the present embodiment, which displays the predicted rotation speed and the predicted treatment time after increasing the rotation speed of the gantry by one step.

Hereinafter, the radiotherapy system and the treatment time management device according to the present embodiment will be described with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a radiotherapy system according to the present embodiment. As shown in FIG. 1, the radiotherapy system according to the present embodiment includes a treatment planning device 10, a radiotherapy information management system (OIS) 20, a radiotherapy device 30, an imaging device 40, and a treatment time management device. It has 50, a display device 60, an input device 70, and an interference simulator 80.

The treatment planning device 10 is a computer that creates a treatment plan for a patient to be treated by using a medical image generated by an imaging device such as an X-ray simulator or a CT simulator. The treatment planning device 10 has a processor such as a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit) and a memory such as a ROM (Read Only Memory) and a RAM (Random Access Memory). The processor generates treatment plan data by executing a treatment plan program stored in the memory. Specific examples of the treatment plan include the irradiation angle and irradiation order of the irradiation gate (Field) by the radiotherapy apparatus 30, the imaging angle by the imaging apparatus 40, the imaging order, the irradiation site, the dose distribution, and the like. The treatment plan data is transmitted to the radiotherapy information management system 20. In addition, the treatment planning device 10 includes an input device, a display, a communication device, and a storage device included in a general-purpose computer or workstation.

The radiotherapy information management system 20 is a computer system that manages information related to radiotherapy in cooperation with a treatment planning device 10, a radiotherapy device 30, an imaging device 40, a treatment time management device 50, and the like. For example, the radiotherapy information management system 20 has a treatment plan database 21. The treatment plan database 21 stores the treatment plan data generated by the treatment planning device 10 in association with patient information and the like. The treatment plan database 21 transmits the treatment plan data to the treatment time management device 50 in response to a request from the treatment time management device 50. In addition, the radiotherapy information management system 20 includes an input device, a display, a communication device, and a storage device included in a general-purpose computer or workstation.

The radiotherapy device 30 is a device for the purpose of radiotherapy, and treats a patient by irradiating the patient with radiation according to a treatment plan. The imaging device 40 performs medical imaging on the patient at the time of radiotherapy or the like to generate a medical image of the patient's body. The radiotherapy device 30 and the imaging device 40 according to the present embodiment can be applied to both an independent type and an integrated type, but are assumed to be an integrated type for the sake of simplicity of the following description.

FIG. 2 is a diagram showing the appearance of the integrated radiotherapy device 30 and the imaging device 40 of FIG. As shown in FIG. 2, the radiotherapy device 30 has a pedestal 31 and a sleeper 32. The gantry 31 has a gantry body 311 that rotatably supports the irradiation head portion 312 and the image capturing device 40 around the rotation axis Z. The irradiation head unit 312 irradiates radiation according to the treatment plan data. Specifically, the irradiation head portion 312 forms an irradiation field by a multi-division diaphragm (multi-leaf collimator), and the irradiation field suppresses irradiation to a normal tissue. When the treatment site is irradiated with radiation, the treatment site disappears or shrinks. The image capturing device 40 has an X-ray tube 41 and an X-ray detector 42 arranged so as to face each other with the rotation axis Z interposed therebetween. The X-ray tube 41 irradiates X-rays, which is radiation for imaging. The X-ray detector 42 detects the X-rays transmitted through the patient irradiated from the X-ray tube 41 and generates X-ray image data regarding the patient. The generated X-ray image data is transmitted to the radiotherapy information management system 20. The radiotherapy information management system 20 displays X-ray image data, generates three-dimensional image data based on X-ray image data related to a plurality of imaging angles, and performs arbitrary rendering processing on the three-dimensional image data. It may be displayed. As shown in FIG. 2, the sleeper 32 has a base 331 and a top plate 322. The base 331 movably supports the top plate 322. The patient is placed on the top plate 322.

The interference simulator 80 executes an interference check for determining the presence or absence of interference between each mechanism of the radiotherapy device 30, each mechanism of the imaging device 40, the patient, and other accompanying devices. The interference simulator 80 is, for example, a general purpose computer or workstation. For example, the interference simulator 80 is installed in a management room or the like adjacent to the treatment room. The interference simulator 80 includes input devices, displays, communication devices, and storage devices included in a general-purpose computer or workstation. The storage device is a storage device such as an HDD, an SSD, or an integrated circuit storage device. Further, the interference simulator 80 has a processor such as a CPU and a GPU and a memory such as a ROM and a RAM. The processor performs an interference check by executing an interference check program stored in the memory. Specifically, the interference simulator 80 calculates the physical distance between each mechanism of the radiotherapy device 30, each mechanism of the imaging device 40, the patient and other accompanying devices, and predicts the interference from the physical distance. And display the result of the interference check. The interference check is performed based on information on the structure of the mechanism such as the radiotherapy device 30, the imaging device 40 and the accompanying device, the movable range of the mechanism (hereinafter referred to as mechanism information), and the body shape information of the patient. .. The mechanism information can be acquired from the mechanism design data (CAD: Computer-Aided Design) relating to the radiotherapy device 30, the imaging device 40, and the accompanying device. The accompanying devices according to the present embodiment include an X-ray computed tomography device, an X-ray angio device, an ultrasonic diagnostic device, and a PET (positron emission tomography) device, which are separate from the radiotherapy device 30 and the imaging device 40. , SPECT (single photon emission CT) device, any imaging device such as a magnetic resonance imaging device, a patient respiration monitoring system, a patient body surface monitoring system, and the like.

Further, as shown in FIG. 1, the interference simulator 80 has a rotation speed table 81 for calculating the rotation prediction time described later. The rotation speed table 81 stores the rotation speed [° / sec] of the gantry in association with the identification information of the gantry.

FIG. 3 is a diagram showing an example of the rotation speed table 81 included in the interference simulator 80. As shown in FIG. 3, the rotation speed table associates devices such as the radiotherapy device 30 and the imaging device 40 managed by the radiotherapy system with the rotation speed [° / sec] of the gantry of the device. For example, the rotation speed of the radiotherapy device A is 5 ° / sec, and the rotation speed of the cone beam CT device C, which is an imaging device, is 30 ° / sec. Information about the rotation speed is supplied to the treatment time management device 50.

The treatment time management device 50 is a computer that manages the calculation, display, and the like of the treatment time for the patient to be treated. The treatment time management device 50 is installed in, for example, a management room adjacent to the treatment room. The treatment time management device 50 includes a communication device and a storage device included in a general-purpose computer or workstation. The storage device is a storage device such as an HDD, an SSD, or an integrated circuit storage device. The treatment time management device 50 has a processor such as a CPU and a GPU and a memory such as a ROM and a RAM. The processor has a treatment time calculation function 51, an actual measurement time measurement function 53, a display control function 54, a selection function 55, and a treatment schedule correction function 56 by executing a treatment time management program stored in the memory. Further, the treatment time management device 50 has a working time table 52.

In the treatment time calculation function 51, the treatment time management device 50 calculates or determines the work prediction time of each of the plurality of work items included in the radiotherapy, and calculates the total work time of these work items as the treatment prediction time. Work items are divided into work items caused by machines and work items caused by humans. Machine-induced work items include, for example, gantry rotation, radiation irradiation, image capture, and bed movement. For example, the treatment time management device 50 is based on the rotation speed of the gantry 31 supplied from the interference simulator 80 and the irradiation angles of a plurality of irradiation gates included in the treatment plan data supplied from the radiotherapy information management system 20. , Calculate the estimated rotation time of the gantry 31 required for movement between a plurality of irradiation gates.

FIG. 4 is a diagram showing an example of a working time table 52 included in the treatment time management device 50. As shown in FIG. 4, the work time table 52 associates a work item caused by a person with an estimated time [s]. Among the work items, the work items caused by the person are classified into the work items of the patient and the work items of the radiologist and the doctor. Examples of the patient's work items include entering and changing clothes, leaving the room and changing clothes. Work items of radiologists and doctors include, for example, patient setup, accessory replacement, position confirmation, and the like. As the predicted time, a value arbitrarily determined by the operator may be registered, or a past actual time may be registered. For example, the predicted time of the patient's work item "entering / changing clothes" is 60 s, and the predicted time of the work item "patient setup" of the doctor and the radiotherapy engineer is 120 s.

In the actual measurement time measurement function 53, the treatment time management device 50 measures the actual working time in radiotherapy for each work item. The measured working time will be called the measured time.

In the display control function 54, the treatment time management device 50 displays the treatment prediction time and the work prediction time calculated by the treatment time calculation function 51 on the display device 60 in a predetermined layout.

In the selection function 55, the treatment time management device 50 selects a display item designated by the user via the input device 70.

In the treatment schedule correction function 56, the treatment time management device 50 corrects the treatment schedule of the hospital in which the radiotherapy information management system 20 is installed according to the treatment prediction time calculated by the treatment time calculation function 51.

A display device 60 and an input device 70 are connected to the treatment time management device 50. The display device 60 is controlled by the display control function 54 of the treatment time management device 50 to display various information such as the treatment prediction time and the work prediction time. As the display device 60, for example, a CRT display, a liquid crystal display, an organic EL display, an LED display, a plasma display, or any other display known in the art can be appropriately used. The display device 60 may be provided in the management room adjacent to the treatment room, or may be provided in the treatment room. The input device 70 receives various commands from the user. As the input device 70, a keyboard, a mouse, various switches, and the like can be used. The output signal from the input device 70 is supplied to the treatment time management device 50.

Next, an operation example of the radiotherapy system according to the present embodiment will be described.

FIG. 5 is a diagram showing a typical processing flow of the radiotherapy system according to the present embodiment. In the first stage of the process of FIG. 5, the treatment planning device 10 generates treatment plan data for the patient to be treated, and the treatment plan database 21 of the radiotherapy information management system 20 registers the treatment plan data for the patient to be treated. It is assumed that you are doing it.

As shown in FIG. 5, the treatment time management device 50 acquires the treatment plan data regarding the patient to be treated registered in the treatment plan database 21 of the radiotherapy information management system 20 (step S1). The patient to be treated is arbitrarily designated by a user such as a radiologist via an input device 70, for example.

When step S1 is performed, the treatment time management device 50 executes the treatment time calculation function 51 (step S2). In step S2, the treatment time management device 50 calculates the estimated treatment time of one radiotherapy for the patient to be treated based on the treatment plan data acquired in step S1. The estimated treatment time for one radiotherapy shall refer to the estimated time until the patient enters the treatment room, receives radiation therapy, and leaves the room. Hereinafter, the calculation of the predicted treatment time will be described in detail.

First, among the treatment prediction times, the calculation of the rotation prediction time, which is the work time related to the rotation of the gantry of the radiotherapy device 30 among the work items caused by the machine, will be described. The treatment time management device 50 extracts the identification information of the radiotherapy device to be used, the irradiation angles of the plurality of irradiation gates, and the irradiation order of the plurality of irradiation gates from the treatment plan data regarding the patient to be treated acquired in step S1. Then, the treatment time management device 50 specifies the rotation speed corresponding to the radiotherapy device to be used from the rotation speed table 81. Further, the treatment time management device 50 calculates the estimated rotation time between the irradiation gates according to the irradiation order based on the amount of movement between the irradiation gates and the rotation speed. The amount of movement is defined by the angular distance between the source irradiation gate and the destination irradiation gate. In principle, when calculating the movement amount, the treatment time management device 50 calculates both the clockwise and counterclockwise movement amounts, and selects the shorter movement amount as the movement amount.

FIG. 6 is a diagram showing an example of calculation of the estimated rotation time. As shown in FIG. 6, the irradiation angle of the first irradiation gate is 225 °, the irradiation angle of the second irradiation gate is 315 °, the irradiation angle of the third irradiation gate is 45 °, and the irradiation of the fourth irradiation gate. The angle is 135 °. In this case, since the angle range (movement amount) between the irradiation gates is 90 °, the predicted rotation time between the irradiation gates is 90/5 = 18 sec. Therefore, the total estimated rotation time from the first irradiation gate to the fourth irradiation gate is 18.3 = 54 sec.

FIG. 7 is a diagram showing another example of calculating the estimated rotation time. As shown in FIG. 7, the irradiation angle of the first irradiation gate is 315 °, the irradiation angle of the second irradiation gate is 225 °, the irradiation angle of the third irradiation gate is 45 °, and the irradiation of the fourth irradiation gate. The angle is 135 °. In this case, the angle range (movement amount) from the first irradiation gate to the second irradiation gate is 90 °, and the angle range (movement amount) from the second irradiation gate to the third irradiation gate is 180 °. The angle range (movement amount) from the third irradiation gate to the fourth irradiation gate is 90 °. Therefore, the angle range (movement amount) from the first irradiation gate to the second irradiation gate is 90 ° / 5 = 18 sec, and the angle range (movement amount) from the second irradiation gate to the third irradiation gate is. 180 ° / 5 = 36 sec, and the angle range (movement amount) from the third irradiation gate to the fourth irradiation gate is 90 °. Therefore, the total estimated rotation time from the first irradiation gate to the fourth irradiation gate is 18 + 36 + 18 = 72 sec.

The treatment time management device 50 calculates the movement amount and the predicted rotation time in consideration of the mechanical limitation of the movable range of the gantry 31.

FIG. 8 is a diagram showing an example of calculation of the rotation prediction time in consideration of the mechanical limitation of the movable range of the gantry 31. When the mechanical origin angle is designed to be 0 °, the gantry 31 is designed with ± 180 ° as the movable range centered on 0 °. In this case, the gantry 31 cannot rotate across 180 °. For example, as shown in FIG. 8, when the irradiation angle of the first irradiation gate is 225 ° and the irradiation angle of the second irradiation gate is 135 °, the irradiation head portion 312 is 180 from the first irradiation gate. It cannot be moved directly to the second irradiation gate via °. In this case, the irradiation head portion 312 must be moved from the first irradiation gate to the second irradiation gate via the mechanical origin angle of 0 °.

As described above, the treatment time management device 50 calculates the movement amount of both the clockwise and counterclockwise routes when calculating the movement amount from the irradiation gate of the movement source to the irradiation gate of the movement destination. Next, the treatment time management device 50 determines whether or not the shorter route passes through 180 °. When not passing through 180 °, the treatment time management device 50 sets the shorter route as the movement route for which the rotation prediction time is calculated, and sets the movement amount of the route as the movement amount for which the rotation prediction time is calculated. To do. When the shorter route passes through 180 °, the treatment time management device 50 sets the longer route as the movement route for which the rotation prediction time is calculated, and sets the movement amount of the route as the rotation prediction time calculation target. Set to the amount of movement of. As a result, it is possible to set the movement path and calculate the rotation prediction time in consideration of the movable range.

The treatment time management device 50 can calculate the irradiation predicted time, which is the work time related to radiation irradiation among the work items caused by the machine. For example, the treatment time management device 50 extracts the irradiation possible dose per hour of the radiotherapy device to be used and the planned irradiation dose to the treatment site from the treatment plan data. Then, the treatment time management device 50 calculates the predicted irradiation time based on the extracted irradiation dose per hour and the scheduled irradiation dose. Specifically, when the irradiable dose is 300 MU / min and the planned irradiation dose is 150 MU, the value obtained by dividing the planned irradiation dose by the irradiable dose, that is, 150/300 = 0.5 minutes = 30 seconds. is there.

The treatment time management device 50 can also calculate the estimated time required for image capture as a machine-induced work item. For example, when the image shooting is 2D shooting, the predicted time required for image shooting is divided into a rotation predicted time and a shooting predicted time. The estimated rotation time for image capture can be calculated in the same manner as the estimated rotation time for irradiation. That is, first, the treatment time management device 50 extracts the rotation speed of the gantry 31 related to image capture, the imaging angles in the plurality of imaging directions, and the imaging order from the treatment plan data. Next, the treatment time management device 50 specifies the rotation speed corresponding to the image capturing device to be used from the rotation speed table 81. Then, the treatment time management device 50 calculates the estimated rotation time required for movement between the imaging directions according to the imaging order based on the amount of movement between the imaging directions and the rotation speed. In the case of 2D imaging, it is not necessary to rotate the gantry during X-ray irradiation, so a predetermined value may be used for the X-ray irradiation time.

When the image shooting is 3D shooting, the shooting time is divided into a rotation prediction time for moving to the initial angle and an irradiation predicted time for cone beam shooting. The estimated rotation time for moving to the initial angle can be calculated based on the amount of movement from the gantry angle before the movement to the initial angle and the rotation speed. The predicted irradiation time can be calculated based on the imaging angle range and the rotation speed. For example, when the imaging angle range is 360 ° and the rotation speed is 10 ° / sec, the predicted irradiation time is 360/10 = 36 seconds.

The treatment time management device 50 can also calculate the estimated time for a work item caused by a person based on the work time table 52. The work items and order of human-derived work required for radiotherapy of the patient to be treated are determined according to the type of radiotherapy and the like. The treatment time management device 50 identifies a work item caused by a person required for radiotherapy of the patient to be treated, and specifies a work predicted time associated with the work item caused by the specified person from the work time table 52.

After calculating the work predicted time of the work item caused by the machine and the work predicted time of the work item caused by the person, the treatment time management device 50 calculates the total time of the work predicted time as the treatment predicted time.

When step S2 is performed, the interference simulator 80 executes an interference check according to the treatment plan data for the patient to be treated (step S3). The interference simulator 80 simulates the operation of each mechanism of the radiotherapy apparatus 30, each mechanism of the imaging apparatus 40, the patient and the accompanying apparatus according to the irradiation order and the imaging order included in the treatment plan data, and each mechanism of the radiotherapy apparatus 30. , It is determined whether or not interference occurs between each mechanism of the imaging device 40, the patient, and the accompanying device.

When step S3 is performed, the treatment time management device 50 executes the display control function 54 (step S4). In step S4, the treatment time management device 50 displays the treatment prediction time calculated in step S2 and the result of the interference check executed in step S3 on the display device 60.

FIG. 9 is a diagram showing an example of a display screen I1 of the treatment prediction time displayed in step S4 and the interference check result. As shown in FIG. 9, the display screen I1 displays the estimated treatment time of radiotherapy for the patient to be treated, displays the work items related to the radiotherapy in a list according to the execution order, and predicts the work time for each work item. Is displayed. Specifically, the display screen I1 displays the work item display column J1 below the patient name to be treated. In the work item display column J1, work items related to radiation therapy for the patient to be treated are displayed in a list according to the execution order. Work items should be displayed separately by hierarchy. For example, the work items on the uppermost layer are classified into "entering / changing clothes", "prescription", and "leaving / changing clothes". The prescription corresponds to the type of treatment for the patient. Specific work items belong to the lower layer of the work item "prescription". For example, patient A is first subjected to X-ray irradiation as prescription A, and then electron beam irradiation as prescription B. A mark indicating the type of the work item is displayed next to the name of each work item. For example, in FIG. 9, ■ indicates a patient's work item, □ indicates a radiation medical technician and a doctor's work item, Δ indicates an imaging work item, and ▲ indicates a radiation irradiation work item.

As shown in FIG. 9, a treatment predicted time display field J2 and a work predicted time display field J3 are provided next to the work item display field J1. The predicted treatment time is displayed in the predicted treatment time display column J2. As described above, the predicted treatment time is the total time of each work predicted time. In the case of FIG. 9, the predicted treatment time is 626 s, that is, 10 m 26 s. The work estimated time of each work item is displayed in the work estimated time display column J3. For example, the work prediction time of the first irradiation is 36s, the work prediction time of the second irradiation is 27s, and the rotation prediction time of the gantry rotation from the first irradiation angle to the second irradiation angle is. 21s. In addition, "cc" refers to counterclockwise direction, and "cw" refers to clockwise rotation.

By displaying the predicted treatment time and the predicted work time for each work item in this way, the user such as a radiologist can use the pedestal in the current irradiation order and imaging order before the patient enters the treatment room. It is possible to know the rotation time and the predicted treatment time. Therefore, the user can prepare an efficient irradiation sequence and can shorten the treatment time. In addition, by displaying the work item and the estimated work time in parallel, the work procedure of radiotherapy is clarified, so that mistakes and rework of the procedure can be reduced.

As shown in FIG. 9, the display screen I1 is provided with an interference check result display column J4. In the interference check result display column J4, the result of the interference check performed in step S3 is displayed. For example, if it is determined in step S3 that there is a risk of interference, "there is a risk of interference" is displayed. At this time, in the work prediction time display column J3, it is preferable that a warning mark J5 is attached to the work item where interference may occur. For example, when it is determined in the interference check that interference may occur in the rotation of the gantry from frontal photography to side photography, a warning mark J5 is added to the work item of gantry rotation from frontal photography to side photography. If it is determined in step S3 that there is no risk of interference, "There is no risk of interference" or the like is displayed.

When step S4 is performed, the treatment time management device 50 waits for a change in the irradiation order and the imaging order (step S5).

Each work item displayed in FIG. 9 is displayed so as to be interchangeable with other work items according to an instruction by the user via the input device 70. That is, the irradiation order and the imaging order can be changed. For example, when the user determines that the irradiation order is inefficient as shown in FIGS. 7 and 8, the user rearranges the order of the irradiation gates so as to be the irradiation order shown in FIG. Sorting may be performed, for example, by dragging and dropping each work item on the display screen I1 shown in FIG. When the image shooting is 2D shooting, the order of the shooting angles can be changed by the same operation.

When the irradiation order and the imaging order are changed (step S5: YES), the treatment time management device 50 calculates the treatment prediction time including the rotation prediction time and the like based on the changed irradiation order and the imaging order (step S5: YES). Step S2), the interference check is performed (step S3), the treatment prediction time and the result of the interference check are displayed again (step S4), and the change of the irradiation order and the imaging order is waited for again (step S5).

In this way, by displaying the predicted treatment time and the predicted work time for each work item and accepting changes in the irradiation order and the imaging order, the user such as a radiologist can optimally perform the treatment before the patient enters the room. The gantry rotation time and treatment prediction time can be set.

When the irradiation order and the imaging order are not changed in step S5 (step S5: NO) and the treatment start button provided on the radiotherapy information management system 20 or the radiotherapy device 30 is pressed, the radiotherapy device 30 and The imaging device 40 starts radiotherapy (step S6). The radiotherapy device 30 and the imaging device 40 perform radiotherapy according to the treatment plan. When the irradiation order and the imaging order are changed in step S5, the radiation therapy is performed according to the changed irradiation order and the imaging order.

During the execution of radiation therapy, the treatment time management device 50 executes the display control function 54 (step S7). In step S7, the treatment time management device 50 displays the elapsed time and the completion status for each work item on the display device 60.

FIG. 10 is a diagram showing an example of the display screen I2 of the elapsed time and the completion status displayed in step S7. As shown in FIG. 10, the display screen I2 is provided with a work item display column J1, a treatment prediction time display column J2, and a work prediction time display column J3, similarly to the display screen I1 of FIG. What are the display contents of the work item display column J1, the treatment predicted time display column J2, and the work predicted time display column J3? It is the same as FIG.

As shown in FIG. 10, an indicator display column J6 is provided next to the work prediction time display column J3. In the indicator display column J6, indicators J61, J62 and J63 indicating the elapsed time and the actual working time for each work item are displayed. The lengths of the indicators J61, J62 and J63 are set to the lengths corresponding to the estimated work time of the corresponding work items. The longer the work prediction time, the longer the widths of the indicators J61, J62 and J63 are set. When the work item has not been performed, the indicator J61 may be displayed in a color indicating that the work item has not been performed, for example, white. When the work item is being carried out, the indicator J62 may be displayed in, for example, a color corresponding to the elapsed time. For example, it is preferable that the lower the ratio of the elapsed time to the predicted work time is, the whiter it is, and the closer it is to 1, the bluer it is. Further, when the elapsed time exceeds the work prediction time, the indicator J63 may be displayed in red, which is a warning color, for example. When the work item is completed, the indicator may be displayed in a color indicating completion, for example, blue. Alternatively, a message such as "completed" may be displayed on the indicator. In this way, the treatment time management device 50 divides the work items into unexecuted, implemented, and completed indicators by displaying the indicators J61, J62, and J63, and visually divides the work items into unexecuted, implemented, and completed. Display separately. This allows the user to clearly grasp the status of each work item.

The elapsed time is measured by the actual measurement time measurement function 53 of the treatment time management device 50. For example, the treatment time management device 50 starts the time measurement with the start of each work item, and ends the measurement with the end of each work item. Instructions for starting and ending each work item may be input by the user via the input devices of the radiotherapy information management system 20, the radiotherapy device 30, and the imaging device 40, or may be input by the user, or the radiotherapy information management system 20, It may be automatically issued by the radiotherapy device 30 and the imaging device 40 with the start and end of the operation corresponding to each work item. The treatment time management device 50 measures the elapsed time in real time and displays an indicator in color or the like at the elapsed time.

In the above example, the elapsed time is represented by the colors of the indicators J61, J62 and J63. However, this embodiment is not limited to this. For example, the treatment time management device 50 may be directly displayed numerically. Further, when all the work items are completed, the total time of the actual measurement time of each work item may be calculated and displayed side by side with the estimated treatment time as the actual measurement treatment time.

FIG. 11 is a diagram showing an example of a display screen I3 that displays the predicted treatment time and the actually measured treatment time in parallel. As shown in FIG. 11, the display screen I3 is provided with a work item display column J1, a treatment prediction time display column J2, and a work prediction time display column J3, similarly to the display screen I1 of FIG. What are the display contents of the work item display column J1, the treatment predicted time display column J2, and the work predicted time display column J3? It is the same as FIG. A treatment actual measurement time display column J7 is provided next to the treatment predicted time display column J2, and a work actual measurement time display column J8 is provided next to the work predicted time display column J3. In the treatment actual measurement time display column J7, the actual work actual time is displayed in parallel with the estimated work time of each work item. As described above, the actual work measurement time and the actual treatment time are measured by the actual measurement time measurement function 53 of the treatment time management device 50. For example, as shown in FIG. 10, the work predicted time of the work item “setup” is 120 s, while the actual work time is 110 s. Further, the predicted treatment time is 626 s, whereas the measured treatment time is 666 s. With such parallel display, it is possible to easily determine how short or long the actual time required is expected.

When the treatment end button is pressed, the radiotherapy device 30 and the imaging device 40 end the radiotherapy (step S8).

As described above, the typical processing of the radiotherapy system according to the present embodiment is completed.

The processing flow of the radiotherapy system according to the present embodiment is not limited to the flow shown in FIG. 5, and various changes can be made. For example, in the above example, in step S3, the rotation prediction time and the treatment prediction time are calculated based on the initial irradiation order and imaging order included in the treatment plan data. However, this embodiment is not limited to this. For example, the treatment time management device 50 has a plurality of irradiation gates and a plurality of imaging directions included in the treatment plan data, and all irradiation sequences and imaging sequences constructed based on the rotation directions (clockwise and counterclockwise). The rotation prediction time and the treatment prediction time may be calculated for the pattern (hereinafter referred to as a movement flow). The rotation prediction time and the treatment prediction time of each movement flow are displayed in parallel with the display device 60 by the treatment time management device 50.

FIG. 12 is a diagram showing an example of a display screen I4 that displays moving flows in parallel. As shown in FIG. 12, the display screen I4 is provided with a display column J9n for each movement flow n. Here, n is a natural number indicating the number of the movement flow. In each display column J9n, the work items and the work prediction time of each movement flow n are displayed in a list in the irradiation order, and the treatment prediction time is displayed. This makes it possible to easily grasp the difference in the irradiation order, the work prediction time, and the treatment prediction time of each movement flow. Further, the adoption button Bn is displayed for each movement flow n. When the adoption button Bn is pressed via the input device 70 or the like, the treatment time management device 50 adopts the movement flow n corresponding to the pressed adoption button Bn as the movement flow for radiotherapy. As a result, the user can adopt the best movement flow from a plurality of movement flows in consideration of the difference in irradiation order, work prediction time, and treatment prediction time.

Further, the treatment time management device 50 performs an interference check for each of the plurality of movement flows before displaying the display screen I4, and together with the result of the interference check, the treatment prediction time, the work item, and the work prediction time of each movement flow n. May be displayed.

FIG. 13 is a diagram showing an example of another display screen I5 that displays moving flows in parallel. As shown in FIG. 13, the display screen I5 is provided with interference check result display fields J101 and J101 together with the display fields J9n and the adoption button Bn of each movement flow n. The interference check result display column J101 is a column for displaying a message indicating a result indicating that there is a risk of interference. The interference check result display column J102 is a column for displaying a message indicating a result indicating that there is no risk of interference. The treatment time management device 50 performs an interference check for each movement flow, displays an interference check result display column J101 for the movement flow determined to be likely to interfere, and determines that there is no possibility of interference. The interference check result display column J102 is displayed.

The display mode of the interference check result is not limited to the display of a message indicating the presence or absence of interference. For example, the treatment time management device 50 may display the presence or absence of interference by the color of the display column J9n or the like. Further, the treatment time management device 50 may mask or blink the display column J9n corresponding to the movement flow n that may interfere.

When the gantry 31 is provided with a mechanism capable of changing the rotation speed, the treatment time management device 50 may display the "high speed" mark M1 adjacent to the work item of "rotation of the gantry". The "high speed" mark M1 indicates that the gantry 31 can be rotated at high speed by utilizing the boost (acceleration) mechanism mounted on the radiotherapy device 30. The treatment time management device 50 displays a boost button together with the predicted treatment time and the predicted work time together with the “high-speed” mark M1. If it is determined by the interference check that the gantry 31 may interfere during rotation, or if it is determined that an object that may interfere with the gantry rotation is close to the start angle or the end angle, the radiotherapy device 30 is used. , "High speed" mark M1 is not displayed.

FIG. 14 is a diagram showing a display screen I6 that displays a work item, a treatment prediction time, and a work prediction time together with a boost button. As shown in FIG. 14, the display screen I6 displays the boost button B4 in the work item display column J1, the treatment prediction time display column J2, and the work prediction time display column J3. The display contents of the work item display column J1, the treatment predicted time display column J2, and the work predicted time display column J3 are the same as the display contents of FIG. The boost button B4 is a button for increasing the rotation speed of the gantry by one step. When the boost button B4 is pressed, the treatment time management device 50 calculates the rotation prediction speed and the treatment prediction time based on the rotation speed after raising the boost button B4 by one step. Then, the treatment time management device 50 displays the rotation prediction speed and the treatment prediction time after the gantry rotation speed is increased by one step.

FIG. 15 is a diagram showing a display screen I7 that displays the predicted rotation speed and the predicted treatment time after increasing the rotation speed of the gantry by one step. As shown in FIG. 15, the work prediction time display column J12 displays the rotation prediction time after increasing the gantry rotation speed by one step, and the treatment prediction time display column J11 displays the rotation prediction time.
The estimated treatment time after increasing the gantry rotation speed by one step is displayed. For example, when FIG. 14 and FIG. 15 are compared, it can be seen that the gantry rotation cw is shortened from 28s to 14s. Further, when the gantry rotation speed is the maximum speed, as shown in FIG. 15, it is preferable that the boost button B4 is marked as non-pressable.

The radiotherapy information management system 20 or the like may manage the treatment schedule of the hospital in which the radiotherapy information management system 20 is installed. The treatment schedule is a timetable of radiation therapy performed in each treatment room. However, the treatment time of each radiotherapy included in the treatment schedule is roughly determined by a medical worker such as a radiological technologist and may not be accurate.

The treatment time management device 50 according to the present embodiment executes the treatment schedule correction function 56, and calculates the treatment time of each radiotherapy included in the treatment schedule by the treatment time calculation function 51 to predict the treatment of the patient to be treated. Correct based on time. Specifically, the treatment time management device 50 first acquires a treatment schedule from the radiotherapy information management system 20. Next, the treatment time management device 50 specifies the radiotherapy schedule of the patient for which the predicted treatment time is to be calculated from the acquired treatment schedule. Then, the treatment time management device 50 overwrites the treatment time of the specified radiotherapy with the treatment prediction time calculated by the treatment time calculation function 51. As a result, the treatment time registered in the treatment schedule can be made more accurate.

As described above, the radiotherapy system according to the present embodiment includes a treatment planning device 10, a radiotherapy device 30, a treatment time management device 50, and a display device 60. The treatment planning device 10 generates treatment planning data for the patient to be treated. The radiation therapy device 30 has a pedestal 31 that rotatably supports the irradiation head portion 312 that irradiates therapeutic radiation. The treatment time management device 50 calculates the estimated rotation time of the gantry 31 required for movement between the plurality of irradiation gates based on the rotation speed of the gantry 31 and the irradiation angles of the plurality of irradiation gates included in the treatment plan data. .. The treatment time management device 50 displays the estimated rotation time of the gantry 31 on the display device 60.

Thus, according to at least one embodiment, it is possible to present an accurate treatment time to a radiological technologist or the like before performing radiotherapy.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and the equivalent scope thereof.

10 ... Treatment planning device, 20 ... Radiation therapy information management system, 21 ... Treatment plan database, 30 ... Radiation therapy device, 31 ... Stand, 32 ... Sleeper, 40 ... Imaging device, 41 ... X-ray tube, 42 ... X-ray Detector, 50 ... Treatment time management device, 51 ... Treatment time calculation function, 52 ... Working time table, 53 ... Actual measurement time measurement function, 54 ... Display control function, 55 ... Selection function, 56 ... Treatment schedule correction function, 60 ... Display device, 70 ... Input device, 80 ... Interference simulator, 81 ... Rotation speed table, 311 ... Stand body, 312 ... Irradiation head, 322 ... Top plate, 331 ... Base.

Claims (12)

A treatment planning department that generates treatment planning data for patients to be treated,
A therapeutic pedestal that rotatably supports the irradiation part that irradiates the therapeutic radiation,
A calculation unit that calculates the estimated rotation time of the treatment pedestal required for movement between the plurality of irradiation gates based on the rotation speed of the treatment pedestal and the irradiation angles of the plurality of irradiation gates included in the treatment plan data. When,
A display unit that displays the estimated rotation time of the treatment frame, and
Radiation therapy system equipped with. The calculation unit determines a plurality of movement patterns including the movement order and the movement direction between the plurality of irradiation gates based on the irradiation angles of the plurality of irradiation gates, and rotates the therapeutic pedestal for each of the plurality of movement patterns. The radiotherapy system according to claim 1, which calculates an estimated time. With more selection
The display unit displays the estimated rotation time for the plurality of movement patterns, and displays the estimated rotation time.
The selection unit selects a movement pattern to be adopted for radiotherapy for the patient to be treated from the plurality of movement patterns according to an instruction via an input device by the user.
The radiation therapy system according to claim 2. An interference check unit for checking interference for each of the plurality of movement patterns is further provided.
The display unit displays the result of the interference check for each of the plurality of movement patterns.
The radiation therapy system according to claim 2. The radiation therapy system according to claim 1, wherein the calculation unit calculates the estimated rotation time of the treatment frame for each movement between the plurality of irradiation gates. The calculation unit calculates the work prediction time for each work item of the movement between the plurality of irradiation gates by the treatment frame, the irradiation of radiation by the irradiation unit, and the human work, and each of the calculated work items. The estimated treatment time for the patient to be treated is calculated as the total estimated time of the work of
The display unit displays the estimated treatment time.
The radiation therapy system according to claim 1. The radiotherapy system according to claim 6, wherein the display unit displays the elapsed time from the work start time with a number or an indicator for each work item. The radiotherapy system according to claim 6, wherein the display unit visually distinguishes between completed items and incomplete items. The radiotherapy system according to claim 6, wherein the display unit displays the predicted treatment time and the measured work time side by side for each work item. The calculation unit calculates the estimated irradiation time of the therapeutic radiation based on the hourly irradiation possible dose of the treatment gantry and the planned irradiation dose to the treatment site.
The display unit further displays the predicted irradiation time.
The radiation therapy system according to claim 1. An imaging pedestal that rotatably supports the irradiation unit that irradiates the imaging pedestal, which is integrated with or separate from the treatment gantry, is further provided.
The calculation unit predicts the rotation of the imaging pedestal required for movement between the plurality of imaging directions based on the rotation speed of the imaging gantry and the imaging angles of the plurality of imaging directions included in the treatment planning data. Calculate the time,
The display unit further displays the estimated rotation time of the imaging frame.
The radiation therapy system according to claim 1. A storage unit that stores treatment plan data for the patient to be treated and the rotation speed of the treatment pedestal that rotatably supports the radiation source.
Based on the rotation speed of the treatment pedestal and the irradiation sequence and irradiation angle of the plurality of irradiation gates included in the treatment plan data, the estimated rotation time of the treatment pedestal required for movement between the plurality of irradiation gates is determined. Calculation unit to calculate and
A display unit that displays the estimated rotation time of the treatment frame, and
A treatment time management device equipped with.

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