JP3999134B2 - Transrectal ultrasound system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transrectal ultrasonic diagnostic apparatus that transmits and receives ultrasonic waves in a state where a probe is inserted into a rectum, thereby forming an ultrasonic image.
[0002]
[Prior art]
Conventionally, a transrectal ultrasonic diagnostic apparatus has been used for ultrasonic diagnosis of the prostate and bladder. This is a method in which ultrasound is emitted from a transducer provided at the tip of the probe with the probe inserted into the subject's rectum, and an ultrasound image is formed based on the reflected wave. It is. Disease diagnosis is performed on organs such as the prostate and bladder based on the ultrasonic images. As such a transrectal ultrasonic diagnostic apparatus, a chair equipped with a mechanical scanning probe is known. This is because an ultrasonic image is formed based on a chair on which a subject is seated, a probe fixed to the chair in a state of protruding from the seating surface, and a received signal from a transducer at the tip of the probe. And an ultrasonic image forming apparatus. The probe is inserted into the rectum of a subject sitting in a chair. A mechanical scanning type vibrator is provided at the tip of the probe. The vibrator emits ultrasonic waves while rotating around the axis of the probe by a motor provided inside the probe. Then, an ultrasonic reception signal reflected from the inside of the living body is transferred to the image forming apparatus. In the image forming apparatus, an ultrasonic image is formed based on this ultrasonic reception signal.
[0003]
[Problems to be solved by the invention]
As described above, conventionally, in such a transrectal ultrasonic diagnostic apparatus, a probe having a mechanical scanning type single transducer is used. However, in order to obtain a higher quality ultrasonic image, there is a desire to use a probe having an electronic scanning array transducer capable of electronic focusing. Therefore, a probe having a non-chair electronic scanning array transducer that is held and operated by an observer's hand has been developed. However, a transrectal ultrasonic diagnostic apparatus having a practical value in which a probe having an electronic scanning array transducer is attached to a chair has not been realized yet. Further, in the conventional transrectal ultrasonic diagnostic apparatus, the probe is fixed to the chair and cannot be easily removed and attached. Therefore, for example, there is a problem that it is difficult to clean the probe or the chair, or that it cannot be replaced with another probe having a different frequency or the like.
[0004]
By the way, since the ultrasonic scanning plane is formed in the vicinity of the vibrator, it is necessary to bring the vibrator in the vicinity of the desired organ in order to acquire an ultrasonic image of the desired organ. Therefore, in the conventional chair-type transrectal ultrasound diagnostic apparatus, the position of the vibrator can be easily adjusted in the vertical and longitudinal directions. Thereby, the visual field range of ultrasonic measurement can be easily adjusted in the vertical direction and the front-back direction. However, since the conventional probe has a radial scan method, no mechanism is provided that can adjust the position of the transducer in the direction around the axis of the probe.
[0005]
In addition, regarding a probe inserted into a body cavity such as the rectum, it is desirable that the shaft diameter is small and the probe has sufficient strength. However, if the thickness of the probe is increased in order to improve the strength, there is a problem that the shaft diameter increases.
[0006]
Therefore, an object of the present invention is to provide an improved transrectal ultrasonic diagnostic apparatus having a probe having an electronic scanning array transducer. Another object of the present invention is to provide a transrectal ultrasonic diagnostic apparatus in which a probe can be easily attached and detached from a chair. Another object of the present invention is to provide a transrectal ultrasonic diagnostic apparatus that improves the strength of a probe and suppresses an increase in shaft diameter. Another object of the present invention is to provide a transrectal ultrasonic diagnostic apparatus that can adjust the visual field range of an ultrasonic image more flexibly.
[0007]
[Means for Solving the Problems]
The transrectal ultrasonic diagnostic apparatus according to the present invention includes a seat where a subject is seated, a probe inserted into the rectum of the subject , and a distal end portion of the probe from the seat. A transrectal ultrasonic diagnostic apparatus comprising: a holding unit that protrudes upward and holds; an ultrasonic image forming unit that forms an ultrasonic image based on a reception signal of the probe; And an electronic scanning type vibrator composed of a plurality of vibration elements, and a probe rotating mechanism for rotating the probe around its central axis, wherein the plurality of vibration elements are It is characterized by being arranged in an arc shape around the axis of the probe .
[0008]
Accordingly, since an ultrasonic diagnosis of an organ in the vicinity of the rectum can be performed with an electronic scanning vibrator, the image quality of an ultrasonic image can be improved by applying an electric focus technique or the like. In addition, since the position of the transducer can be adjusted also in the direction around the axis of the probe, the visual field range of the ultrasonic image can be changed in the direction around the axis.
[0009]
In the above-described transrectal ultrasonic diagnostic apparatus, the probe is provided at the distal end portion, and is connected to the electronic scanning transducer including a plurality of vibration elements and the distal end portion, and three or more A connecting pipe having a multi-tube structure in which tubes are provided coaxially, and an inlet for injecting an acoustic matching liquid into a balloon covering the tip, and a tip in the balloon A suction port for sucking air; and the connection tube includes a first tube communicated with the injection port, a second tube communicated with the suction port, and the electronic scanning vibration And a third tube through which a signal line connected to the child is inserted .
[0010]
Accordingly, since an ultrasonic diagnosis of an organ in the vicinity of the rectum can be performed with an electronic scanning vibrator, the image quality of an ultrasonic image can be improved by applying an electric focus technique or the like. In addition, since the multi-tube structure is used, the strength of the probe can be improved without particularly increasing the tube thickness.
[0011]
In the transrectal ultrasonic diagnostic apparatus described above, the holding unit includes a storage unit that stores the probe, and a fixing unit that fixes the probe to the storage unit. The child rotation mechanism includes an operation unit for operating the rotation of the probe, a drive unit that generates a drive force in response to the operation, and a drive force generated by the drive unit to the storage unit. It is desirable to have a rotation transmission mechanism that transmits as a dynamic motion.
[0012]
Accordingly, since an ultrasonic diagnosis of an organ in the vicinity of the rectum can be performed with an electronic scanning vibrator, the image quality of an ultrasonic image can be improved by applying an electric focus technique or the like. Also, the probe can be easily detached from the chair. Therefore, for example, cleaning and replacement of the probe can be easily performed.
[0013]
In the above description, the probe may be inserted either automatically or manually. The ultrasonic image may be an ultrasonic image by B mode display, M mode display, Doppler display, or other display methods. The plurality of vibration elements are preferably arranged in an arc shape in the direction around the probe axis, but may be arranged in the axial direction. Further, the vibration element may be provided in both the axial direction and the axial direction, or may be provided in another direction.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 shows a schematic diagram of a transrectal ultrasonic diagnostic apparatus 10 according to an embodiment of the present invention. The transrectal ultrasound diagnostic apparatus 10 is configured to obtain an ultrasonic image based on a reception signal from a chair portion 12 on which a subject sits, an observation unit 14 having a probe 18, and a tip portion of the probe 18. It is roughly divided into the image forming apparatus 16 to be formed. Further, an injection device 20 for injecting an acoustic matching liquid into a thin film bag called a balloon covering the tip of the probe 18, a suction device 22 for sucking air in the balloon, and the like are attached.
[0016]
The chair part 12 has a seat part 24 for the subject 30 to sit on, a leg part 25 for supporting the seat part, and a backrest 27 for the subject to lean on. A hole 24 a for projecting the probe 18 is formed in the seat 24 of the chair 12. The observation unit 14 includes a probe 18 that transmits and receives ultrasonic waves, a holding unit that holds the probe 18 in a state of protruding from the seat (which will be described later with reference to FIG. 7), A position adjusting unit for adjusting the position is provided. The observation unit 14 is fixed to the chair portion 12 by a fixing mechanism (not shown). The probe 18 is held by the holding portion so as to protrude from the hole 24a of the seating surface, and its position is adjusted by operation of the position adjusting portion. At this time, the position information of the probe 18 is detected by a position detection unit provided in the position adjustment unit, and sent to the image forming apparatus 16 through the scanner cable 26.
[0017]
The subject 30 inserts the probe 18 from the anus into the rectum 30c while sitting on the chair portion 12. An observer such as a doctor adjusts the position of the probe 18 by operating an operation unit provided in the position adjustment unit, and moves the tip of the probe 18 to the vicinity of the prostate 30a and the bladder 30b, which are observation target parts. In this state, a transmission signal for ultrasonic radiation is sent from the image forming apparatus 16. Based on this transmission signal, an ultrasonic wave is emitted from the tip of the probe 18, and a reception signal based on the reflected wave is sent to the image forming apparatus 16 through the probe cable 28. At the same time, the position information of the probe 18 detected by the position detector is also sent to the image forming apparatus 16 through the scanner cable 26. The image forming apparatus 16 forms a tomographic image of an organ such as the prostate 30a based on the received signal and position information.
[0018]
Further, at the time of diagnosis, water or a chemical solution that is an acoustic matching liquid is injected into a balloon that covers the distal end portion of the probe 18. This is to prevent the attenuation and reflection of ultrasonic waves by the air in the gap between the probe 18 and the wall of the rectum 30c, and to perform efficient transmission / reception. Therefore, the liquid for acoustic matching into the balloon is injected by the injection device 20 via the injection hose 32. Further, the air remaining in the balloon is sucked by the suction device 22 through the suction hose 34.
[0019]
FIG. 2 shows a perspective view of the probe 18 in the transrectal ultrasonic diagnostic apparatus 10. The probe 18 is roughly divided into a distal end portion 36 inserted into the body cavity, a gripping portion 40 accommodated in the holding portion, and a connecting tube 38 that connects the distal end portion and the gripping portion.
[0020]
The distal end portion 36 has a substantially elliptical shape that is rounded so as to be easily inserted into the rectum 30c. An electronic scanning type transducer 46, which will be described later, is arranged on the side surface of the distal end portion, and a fan-shaped scanning surface is formed around this. Further, two injection ports 44 for injecting the acoustic matching liquid into the balloon are provided below the vibrator 46 so as to face each other. At the apex of the distal end portion 36, a suction port 42 for sucking air in the balloon is provided.
[0021]
The grip portion 40 has a cylindrical shape having a flange portion 52 at the upper end. The collar portion 52 is provided with a cutout portion 52 a for preventing the probe 18 from rotating. Further, an injection hose port 56 and a suction hose port 54 connected to the injection hose 32 and the suction hose 34 respectively project from the side of the cylinder. A probe cable hole 60 is provided at the lower end of the grip portion 40, and the probe cable 28 is drawn out. The connecting pipe 38 is a shaft that connects the tip part 36 and the grip part 40 and has a double pipe structure.
[0022]
This will be described with reference to the cross-sectional view shown in FIG. 3 and the AA cross-sectional view shown in FIG. As can be seen from FIG. 3 and FIG. 4, the connecting pipe 38 has a double pipe structure composed of an inner pipe 66 and an outer pipe 62 provided coaxially, one end at the distal end portion 36 and the other end. Is connected to the gripping portion 40. Both the outer tube 62 and the inner tube 66 are made of steel tubes having a thickness of 0.3 mm. However, the material is not limited to steel, and may be various alloys or hard resins as long as the material has a predetermined strength. Moreover, the thickness should just be the thickness which can maintain intensity | strength according to a material. A suction tube 68 is inserted into the inner tube 66. The suction tube has a thickness of 0.3 mm and is made of Teflon (registered trademark). However, the tube is not limited to Teflon, and may be tubes of various materials having insulating properties. The suction tube 68 has one end connected to the suction port 42 and the other end connected to the suction hose port 54. A probe cable 28 (not shown) drawn from the transducer 46 is also inserted into the inner tube 66. A gap between the inner tube 66 and the outer tube 62 serves as an injection path 64 for the acoustic matching liquid 76 so that the acoustic matching liquid 76 flows. One end thereof is connected to the injection port 44. An injection path port 72 protrudes from the end of the outer tube 62 on the gripping portion side, and is connected to the injection hose port 56 via a connection tube 74.
[0023]
Thus, by making the connecting pipe 38 into a double pipe structure, the strength of the connecting pipe 38 can be improved without significantly increasing the wall thickness. Further, since the gap between the inner tube 66 and the outer tube 62 is used as the injection path 64, the space in the connecting tube 38 can be used effectively. Therefore, an increase in the shaft diameter can be suppressed while improving the strength of the connecting pipe 38. Further, by providing the probe cable 28 in the inner tube 66 and the injection path 64 in the outer tube 62, the cable and the liquid can be reliably separated from each other.
[0024]
In the present embodiment, the connecting pipe 38 is a double pipe. However, instead of the double pipe, for example, a multiple pipe composed of a plurality of pipes such as a triple pipe or a quadruple pipe may be used. In this embodiment, the gap between the outer tube and the inner tube is used as an injection path. This gap is used as a suction path for transmitting suction force, and is used for injection for injecting the acoustic matching liquid into the inner pipe. A tube may be inserted.
[0025]
The case where the acoustic matching liquid 76 is injected and the air is sucked by the probe 18 will be described. FIG. 5 shows the distal end portion 36 covered with the balloon 80. The balloon 80 covering the distal end portion 36 is attached to the distal end portion 36 by an attachment tool 78 such as a rubber band. The acoustic matching liquid 76 injected from the injection device 20 is injected into the balloon from the injection port 44 via the injection hose 32, the injection path 64, and the like. The suction force from the suction device 22 is transmitted to the suction port 42 via the suction hose 34, the suction tube 68, and the like. Thereby, the air in the upper part of the balloon 80 is sucked from the suction port 42. The acoustic matching liquid 76 sucked simultaneously with the air is discharged into a waste liquid container provided in the suction device 22 through the suction hose 34 and the like. Thus, by filling the balloon 80 with the acoustic matching liquid 76 and eliminating the air layer in the gap between the transducer 46 and the rectum 30c, the attenuation and reflection of ultrasonic waves by the air layer can be prevented, and the efficiency can be improved. Good transmission and reception can be performed.
[0026]
Next, the vibrator 46 used in the present embodiment will be described. FIG. 6 is a cross-sectional view taken along the line BB in FIG. The vibrator 46 includes a vibration element group 82 including a plurality of vibration elements 82 a, and the plurality of vibration elements 82 a are arranged in an arc shape on the periphery of the tip portion 36. Each vibration element 82a is connected to a lead wire (not shown), and an ultrasonic signal is transmitted / received via the lead wire. The plurality of lead wires are bundled and inserted into the connecting tube 38 as the probe cable 28. An acoustic lens 84 is provided on the front surface of the vibration element group 82, and the ultrasonic beam radiated from the vibration element group 82 is converged in the elevation direction. A backing material 86 is provided on the back surface of the vibration element group 82 to absorb backward sound waves and suppress emission of excessive sound waves.
[0027]
When performing ultrasonic diagnosis, a plurality of transmission pulses having a predetermined delay time are transmitted from a transmission circuit (not shown) to a plurality of vibration elements 82a via a plurality of lead wires. Thereby, ultrasonic waves are radiated from each vibration element 82a, and a fan-shaped scanning surface 88 perpendicular to the probe axis is formed. The reflection of the emitted ultrasonic wave is received by each vibration element 82a, converted into a voltage signal, and transmitted to the image forming apparatus 16 through a lead wire as a reception signal having a delay time. In the image forming apparatus 16, the received signal having this delay time is subjected to phasing addition processing, and an ultrasonic image is formed based on the received signal obtained thereby. The transmission / reception signal is transmitted / received with a predetermined delay time. By controlling this delay time, electronic focusing of the ultrasonic beam becomes possible, and a more accurate ultrasonic image can be acquired.
[0028]
In the present embodiment, the plurality of vibration elements are arranged in a circular arc shape around the axis, but the present invention is not limited to this arrangement. For example, a plurality of vibration elements may be arranged in a straight line in the axial direction. In this case, a scanning plane parallel to the probe axis is formed, and a longitudinal tomographic image such as a prostate can be acquired. Further, the vibration elements may be arranged in a linear shape in the axial direction and a circular arc shape around the axis. The scanning method is not limited to convex scanning, and may be electronic sector scanning or linear electronic scanning.
[0029]
Next, a probe holding mechanism and a rotation mechanism will be described with reference to FIG. FIG. 7 is a perspective view of the probe 18, the holding unit 90, the drive unit 92, and the operation unit 94. In addition, the drive part 92 and the operation part 94 show only the part especially related to the rotation mechanism of the probe, and the vertical movement mechanism and the tilting mechanism are not shown. In addition, the transrectal ultrasonic diagnostic apparatus of this embodiment has a position detection unit for detecting the position of the tip of the probe, but this is also not shown.
[0030]
The holding unit 90 is roughly divided into a fixing lid 96 for fixing the probe 18, a cylinder 98 for storing the probe 18, and a holding box 100 which is a holding unit main body. The holding box 100 is fixed to the main body of the observation unit 14 and supports the cylinder 98 by a plurality of bearings 102 so as to be rotatable. The fixing lid 96 is provided with a through hole 104 at the center through which the tip of the probe can pass. Further, a lid side screwing portion 106 is provided inside the fixing lid 96. The cylinder 98 has a cylindrical shape that can accommodate the grip portion 40 of the probe 18, and a slit 108 is provided on the side surface so that the injection hose port 56 and the suction hose port 54 can slide. In addition, a cylinder side screwing portion 110 for screwing into the lid side screwing portion 106 is provided at the upper end. The inner diameter of the cylinder side screwing portion 110 is slightly smaller than the outer diameter of the flange portion 52 of the probe 18. Further, a geared rod 112 having a cylinder gear 116 is provided at the lower end of the cylinder 98, and a cable opening 114 for drawing the probe cable is provided at the center thereof. On the outer peripheral side of the geared rod 112, a rotation prevention notch 118 for preventing the cylinder 98 from rotating beyond an allowable value is provided. The holding box 100 is provided with a rotation prevention shaft 120 at a position corresponding to the rotation prevention notch 118. When the cylinder 98 rotates 30 degrees in either the left or right direction, the rotation prevention notch 118 abuts against the rotation prevention shaft 120. Thereby, the cylinder 98 cannot be rotated by 30 degrees or more on the left and right.
[0031]
The operation unit 94 includes an operation panel 124 that displays a rotation angle and an operation knob 126 that performs a rotation operation. The rotation of the probe 18 is adjusted by rotating the operation knob 126 left and right. The rotation of the operation knob 126 is transmitted to the first pulley 130 through the transmission shaft 128 connected to the operation knob 126. The rotation of the first pulley 130 is transmitted to the second pulley 134 provided in the holding box 100 via the transmission wire 132. The second pulley 134 has a gear that meshes with the gear portion of the geared rod 112, and the driving force generated by the driving portion due to this meshing is transmitted to the cylinder as a rotational motion.
[0032]
When the probe 18 is attached to the chair portion 12, the fixing lid 96 is passed through the probe 18 from the distal end side, and the probe cable 28 is passed through the slit 108 of the cylinder 98 to inside the cylinder 98. To fit. Then, the injection hose port 56 and the suction hose port 54 are slid into the slit 108 of the cylinder 98, and the probe 18 is accommodated in the cylinder 98. When the probe 18 tries to rotate in the cylinder 98, the injection hose port 56 and the slit 108 projecting from the side of the probe 18 interfere with each other and serve as a stopper. The rotation of the probe 18 can be prevented. Further, since the inner diameter of the cylinder side screwing portion 110 of the cylinder 98 is smaller than the diameter of the flange portion 52 of the probe 18, the probe 18 that is slid and inserted into the cylinder 98 is Stop at a predetermined position. In this state, the lid side screwing portion 106 and the cylinder side screwing portion 110 are screwed together. Thereby, it is possible to prevent the probe 18 from jumping out of the cylinder 98. When removing the probe 18 from the chair part 12, the above procedure is reversed. That is, the probe can be removed from the chair portion by removing the fixing lid 96 and extracting the probe 18 from the cylinder 98 and then allowing the probe cable 28 to pass through the slit 108. Thereby, a probe can be easily attached to or detached from the holding portion. Therefore, for example, the probe can be easily cleaned or replaced with another probe.
[0033]
When the probe 18 is rotated, the operation knob 126 is operated with the probe 18 mounted on the holding portion 90, and the cylinder 98 is rotated. When the cylinder 98 is rotated, the rotation is transmitted to the probe 18 fixed to the cylinder 98, and the probe 18 is also rotated in the same manner as the rotation of the cylinder 98. As a result, the vibrator 46 provided at the tip of the probe 18 can be rotated in the direction around the axis. Therefore, the visual field range of the ultrasonic image can be easily adjusted in the direction around the axis, and an ultrasonic image of a desired organ can be obtained more easily.
[0034]
In this embodiment, the probe 18 is rotated by transmitting the rotational force generated when the operation knob 126 is operated to the cylinder 98 via the transmission shaft 128. However, the probe 18 is rotated by other methods. It does not matter. For example, the probe may be rotated by transmitting a rotational force of a motor or the like to a cylinder or a probe body using a transmission shaft or the like.
[0035]
【The invention's effect】
According to the transrectal ultrasonic diagnostic apparatus of the present invention, since an ultrasonic diagnosis of an organ near the rectum can be performed with an electronic scanning probe, a high-quality ultrasonic image is applied by applying an electronic focusing technique. Can be obtained. Also, the probe can be easily detached from the chair.
[0036]
Moreover, since it has a multi-tube structure, the strength can be improved without significantly increasing the thickness of the probe shaft.
[0037]
In addition, since the position of the transducer can be easily adjusted in the direction around the axis of the probe, the field of view of the ultrasonic image can be adjusted more flexibly.
[Brief description of the drawings]
FIG. 1 is a schematic view of a transrectal ultrasonic diagnostic apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view of a probe of the transrectal ultrasonic diagnostic apparatus according to the embodiment of the present invention.
FIG. 3 is a cross-sectional view of a probe of a transrectal ultrasonic diagnostic apparatus according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view taken along line AA of the probe of the transrectal ultrasonic diagnostic apparatus according to the embodiment of the present invention.
FIG. 5 is a perspective view when a balloon is attached to the probe of the transrectal ultrasonic diagnostic apparatus according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view of the probe of the transrectal ultrasonic diagnostic apparatus according to the embodiment of the present invention, taken along the line BB.
FIG. 7 is a diagram showing a probe holding mechanism and a rotation mechanism of the transrectal ultrasonic diagnostic apparatus according to the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Transrectal type ultrasonic diagnostic apparatus, 16 Ultrasound image forming apparatus, 18 Probe, 24 Seat part, 30 Subject, 38 Connection pipe, 40 Gripping part, 42 Suction port, 44 injection port, 46 Vibrator, 62 outer pipe, 64 injection path, 66 inner pipe, 76 acoustic matching liquid, 80 balloon, 88 scanning plane, 90 holding section, 92 drive section, 94 operation section, 98 cylinder, 126 operation knob, 132 transmission wire.

Claims (6)

A seat where the subject is seated;
A probe inserted into the subject's rectum;
A holding portion that holds the tip of the probe projecting upward from the seat portion; and
An ultrasonic image forming unit that forms an ultrasonic image based on a received signal of the probe;
In a transrectal ultrasonic diagnostic apparatus comprising:
An electronic scanning vibrator that is provided at the tip portion and includes a plurality of vibration elements;
A probe rotation mechanism for rotating the probe around its central axis;
Have
The transrectal ultrasonic diagnostic apparatus, wherein the plurality of vibration elements are arranged in an arc shape around an axis of the probe. The transrectal ultrasonic diagnostic apparatus according to claim 1 ,
The holding part is
A storage section for storing the probe;
Fixing means for fixing the probe to the storage unit;
Have
The probe rotating mechanism is
An operation unit for operating the rotation of the probe;
A driving unit that generates a driving force in response to the operation;
A rotation transmission mechanism for transmitting a driving force generated in the drive unit to the storage unit as a rotation motion;
A transrectal ultrasonic diagnostic apparatus comprising: The transrectal ultrasonic diagnostic apparatus according to claim 1 or 2,
Before Kisagu probe is,
An electronic scanning vibrator that is provided at the tip portion and includes a plurality of vibration elements;
A multi-tubular structure connecting pipe connected to the tip and having three or more pipes coaxially;
Have
The tip is formed with an inlet for injecting an acoustic matching liquid into a balloon covering the tip, and a suction port for sucking air in the balloon,
The connection pipe includes a first pipe communicated with the injection port, a second pipe communicated with the suction port, a third tube through which a signal line connected to the electronic scanning vibrator is inserted, including,
A transrectal ultrasonic diagnostic apparatus characterized by the above. The transrectal ultrasonic diagnostic apparatus according to claim 3 ,
When there is another pipe inside the first pipe, the gap between the first pipe and the other pipe is used as an injection path,
If there is another pipe inside the second pipe, use the gap between the second pipe and the other pipe as a suction path,
A transrectal ultrasonic diagnostic apparatus characterized in that when another tube is present inside the third tube, a gap between the third tube and the other tube is used as a signal line insertion path. The transrectal ultrasonic diagnostic apparatus according to any one of claims 1 to 4 ,
The transrectal ultrasonic diagnostic apparatus, wherein the probe has a mounting portion that is detachably mounted to the holding portion. The transrectal ultrasonic diagnostic apparatus according to claim 5 ,
The holding part is
A storage section for storing the probe;
Fixing means for fixing the probe to the storage unit;
Have
The transrectal ultrasonic diagnostic apparatus, wherein the mounting portion includes a gripping portion that is housed in the housing portion.

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