JP2731168B2 - Tomography equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention irradiates a subject placed on a tabletop with X-rays,
The present invention relates to a tomography apparatus for performing tomography.

(Prior Art) In a conventional tomography apparatus, a surgeon performs a setup operation such as turning on a power source and moving an X-ray tube to a predetermined position. After the setup operation is completed, the tomography of the subject is performed. Shooting is taking place. That is, when the operator turns on a switch or the like, the tomographic apparatus moves the X-ray tube in, for example, a linear direction, and moves the bucky apparatus while facing the moving direction of the X-ray tube. X-rays are emitted to a subject placed on a bed, and a tomographic image is projected on an X-ray film in a bucky apparatus. The X-ray tube and the bucky device in such a device move linearly within a certain range as described above, and this range of motion is generally called a clear zone.

By the way, before the tomographic imaging of the subject is performed, an obstacle (an obstacle) such as a drip stand often exists in the movement range of the X-ray tube and the Bucky apparatus, that is, in the clear zone.

(Problems to be Solved by the Invention) However, despite the presence of the interfering object within the movement range of the X-ray tube and the Bucky apparatus, the operator performs tomography without confirming the interfering object. Was. For this reason, for example, the X-ray tube collides with the drip stand, and the X-ray tube is destroyed. This not only hinders tomography, but also lacks safety. For this reason, when performing tomography by placing an interfering object such as a drip stand near the inside of the clear zone, the outer periphery of the clear zone is taped to indicate that the zone is a clear zone, so that the interference does not occur. To ensure safety.

However, even if the operator can recognize the clear zone in advance by the above-described method, the subject cannot recognize how the device moves, and moves during imaging by being surprised by the movement of the X-ray tube, There was a problem of getting injured.
Therefore, in the conventional tomography, when confirming whether or not an interference object exists in the movement range of the X-ray tube and the Bucky apparatus, the imaging operation is performed without exposing the X-ray. Was.

However, in this case, since the X-ray tube moves quickly and the imaging operation is performed, there is a danger in confirming the interference.

Accordingly, it is an object of the present invention to confirm the clear zone, improve the reliability of the apparatus by taking a safe and reliable photograph, and
An object of the present invention is to provide a tomographic apparatus capable of reducing the amount of radiation of a line and reducing the operation burden on an operator.

[Structure of the Invention] (Means for Solving the Problems) The present invention has taken the following means to solve the above problems and achieve the object. That is, according to the present invention, the X-ray source is moved to a preset position, and the X-ray source and a projection device for projecting a tomographic image on an X-ray film are opposed to each other to perform a linear or rotating operation. In a tomography apparatus that radiates X-rays to a subject placed on a tomography apparatus, the X-ray source and the imaging apparatus are tilted at a maximum contact angle with respect to a straight line direction before tomography, and It is provided with an initial operation means for rotating in the rotation direction at the maximum contact angle.

(Action) By taking such means, the following action is exhibited. Prior to exposing X-rays from the X-ray source,
Since the source moves linearly and circularly at a very low speed, the operator can check for interferences in the clear zone of the apparatus before tomography. As a result, tomography can be performed safely and reliably, and the reliability of the apparatus is improved. In addition, since tomographic imaging can be performed reliably, it is not necessary to perform multiple imagings, the operation burden on the operator can be reduced, and imaging errors can be prevented, so that the amount of X-ray exposure can be reduced. Furthermore, since the subject can be made to recognize the motion of the apparatus before the photographing, the subject does not move with fear during the photographing.

(Embodiment) FIG. 1 is a schematic configuration diagram showing one embodiment of a tomography apparatus according to the present invention. FIG. 2 is a top view of the device,
FIG. 3 is a side view of the device, and FIG. 4 is a front view of the device. In FIG. 1, an X-ray tube 1 emits X-rays to a subject (not shown) mounted on a bed 2. As shown in FIG. 2, the X-ray tube 1 is attached to a support post 4,
This support 4 is attached to a gantry 5. X-ray tube 1
Moves along with the column 4 in the linear direction Y, that is, as shown in FIG. The X-ray tube 1 moves so as to be inclined at a maximum contact angle of ± 23 ° together with the column 4 in the linear direction X, that is, the direction as shown in FIG. Therefore, the movement range of the X-ray tube 1 and the support 4, that is, the clear zone 6 is a region indicated by a hatched portion. The X-ray tube 1 rotates at a very small speed in the rotation direction Q at the maximum contact angle. The bucky device 3 is a device for transferring an image transmitted through the subject as a tomographic image onto an X-ray film. As shown in FIG. 1, the bucky device 3 moves in the linear direction X2 while opposing the movement of the X-ray tube 1 in the linear direction X1, whereby tomography is performed.

The operation panel 10 as an initial operation means performs an operation of confirming the clear zone 6 prior to the tomography. That is, the operation panel 10 is provided on the bed 2 side, and is used to move the X-ray tube 1 in the linear directions X and Y in the position signal s.
1 and a test switch 11 for generating a speed signal s2 and a speed signal s3 for rotating in the rotation direction Q. When the test switch 11 is pressed, a position signal is sent to the X-ray tube 1 after one second elapses no matter where the X-ray tube 1 is stopped.
s1 and a speed signal s2 in the linear direction X1 are output. The X-ray tube 1 receives the position signal s1 and the speed signal.
s2 is input, and moves so as to incline at the maximum contact angle of 23 ° in the linear direction X1. When the X-ray tube 1 stops at the position of the maximum contact angle 23 °, the test switch 11
The X-ray tube 1 is rotated in the rotation direction Q at a maximum contact angle of 23 ° and a minute speed (1/3 of the LOW speed). When the test switch 11 is pressed, the rotation of the X-ray tube 1 is interrupted, and when the test switch 11 is opened, the rotation of the X-ray tube 1 is stopped and the X-ray tube 1 is locked at that position. In addition, the rotation is started after one second elapses by pressing the test switch 11 again.

Next, the operation of the embodiment configured as described above will be described with reference to FIG. First, a clear zone check is performed prior to tomography. That is, the surgeon turns on the power (step A), and then presses the test switch 11 (step B). Then, when the test switch 11 is pressed, a position signal s1 and a speed signal s2 are generated.
The speed signal s2 is sent to the X-ray tube 1. Then, the X-ray tube 1 receives the position signal s1 and the speed signal s2, and after one second, tilts to the position in the linear direction X1, that is, the position of the maximum touch angle of 23 ° (steps CD). When the X-ray tube 1 stops at the maximum contact angle of 23 °, the X-ray tube 1 receives the speed signal s3 from the test switch 11 and starts rotating in the rotation direction Q (step E). When the test switch 11 is released (step F), the X-ray tube 1 stops rotating and is locked at that position. When the test switch 11 is pressed again, the X-ray tube 1 starts rotating again. Then, the operator confirms the motion range of the X-ray tube 1, that is, the clear zone. When the clear zone check is completed, the test switch 11 is opened.

Next, a setup operation for tomography is performed. That is, the trajectory and the division format are selected to prepare for tomography, and the set switch 12 is pressed (step G). Then, the X-ray tube 1 moves to the start position of the selected trajectory, that is, the imaging position in the linear direction and the rotation direction (Steps H to K). Then, the camera stops at that position, the setup operation is completed, and the preparation for photographing is completed (step L).

As described above, according to the present embodiment, before the X-ray tube 1 is irradiated by the operation of the test switch 11, the X-ray tube 1 linearly and circularly moves at a very low speed. Interference in the clear zone of the device can be confirmed before shooting. As a result, tomography can be performed safely and reliably, and the reliability of the apparatus is improved. In addition, since tomographic imaging can be reliably performed, it is not necessary to perform multiple imagings, so that the operation burden on the operator can be reduced and an imaging error can be prevented, so that the amount of X-ray exposure can be reduced. Further, since the subject can be made to recognize the movement of the apparatus before the photographing, the subject does not move with fear during the photographing and is not injured.

It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[Effects of the Invention] According to the present invention, the X-ray source is moved to a preset position, and the X-ray source and a projection device for projecting a tomographic image on an X-ray film are linearly or rotated while facing each other. In a tomographic apparatus for performing tomography by irradiating an X-ray to a subject placed on a couch while performing an operation, the X-ray source and the imaging apparatus are moved up to a maximum in a linear direction prior to tomography. Since there is provided an initial operation means for tilting at the touch angle and rotating in the rotation direction at the maximum touch angle, it is possible to confirm an interference object in the clear zone prior to photographing. as a result,
It is possible to provide a tomographic apparatus capable of safely and reliably imaging, improving the reliability of the apparatus, reducing the amount of X-ray exposure, and reducing the operation burden on the operator.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a tomography apparatus according to the present invention. FIG. 2 is a top view of the device, FIG. 3 is a side view of the device, and FIG. 4 is a front view of the device.
FIG. 5 is a flowchart for explaining the operation of the embodiment. 1 ... X-ray tube, 2 ... Bed, 3 ... Bucky device, 4 ...
... post, 5 ... stand, 6 ... clear zone, 10 ... operation panel, 11 ... test switch, X1, X2, Y ... linear direction, Q ... rotation direction.

Claims (1)

(57) [Claims] An X-ray source is moved to a predetermined position, and the X-ray source and a projection device for projecting a tomographic image on an X-ray film are opposed to each other to perform a linear or rotary operation and to perform a bed. In a tomography apparatus that radiates X-rays to a subject placed on a tomography apparatus, the X-ray source and the imaging apparatus are tilted at a maximum contact angle with respect to a straight line direction before tomography, and A tomography apparatus, comprising: an initial operation unit that rotates the rotation at the maximum contact angle in the rotation direction.