JPH0724693B2 - Safety device in sitting irradiation surgical treatment system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with an adjusting device for moving a diseased part to the center of rotation in a sitting irradiation surgical treatment system using an electron beam linear acceleration irradiation device which allows a patient to perform radiation irradiation surgical treatment in a comfortable sitting position. It concerns a swivel chair. In recent years, for example, an affected area such as a tumor or an arteriovenous malformation (hereinafter, the affected area to be treated by radiation is simply referred to as an affected area) is not treated by a surgical operation, but ionized by x-rays, γ-rays or the like. Treatments have been advanced to irradiate radiation (hereinafter, all ionizing radiation used for treatment is simply referred to as radiation) to chemically alter the cellular tissue of the affected area.

[0002]

2. Description of the Related Art A conventional sitting position irradiation surgical treatment system will be described with reference to FIG. FIG. 4 is an explanatory diagram of a state in which the affected area of the patient is irradiated with radiation using the electron beam linear acceleration irradiation device to perform treatment. In FIG. 4, the patient 41 is shown sitting on the swivel chair 42 and receiving the irradiation of the electron beam 44 from the electron beam linear acceleration irradiation device 43 toward the center of the affected area 45. The irradiation field at the irradiation center of the electron beam 44 at this time is, for example, 3 m in diameter.
The size can be any size of m or more. Backrest 46
By changing the angle of the head fixing device and by adjusting the fixing portion 47 of the head fixing device, the head fixing device 48 is changed to the swivel chair 42.
It is attached at a predetermined position. Adjustment of the above installation,
The swivel chair 42 is adjusted so that the swivel chair 42 can be rotated at a constant angular velocity about a vertical axis passing through the center position of the affected part 45. The rotation angular velocity of the swivel chair 42 is, for example, about 1/2 rotation per second, but can be any rotation speed. In this case, since the patient 41 sitting on the swivel chair 42 rotates at a constant angular velocity, his / her eyes do not rotate. Further, the rotation center of the electron beam linear acceleration irradiation device 43 is adjusted so as to rotate about the center of the affected area 45 within a vertical plane passing through the center position of the affected area 45. Further, a jaw fixing device 49 that enables irradiation of the electron beam 44 without fatigue of the patient 41 for a long time.
Etc. are provided.

As shown in FIG. 4, when the irradiation angle of the electron beam 44 of the electron beam linear acceleration irradiation device 43 is 0 ° in front of the horizontal plane of the affected area 45, for example, it starts from −45 ° and then, as shown in FIG. Rotate back and forth to a position 225 degrees posterior to the patient 41 at. Further, since the swivel chair 42 rotates at a constant angular velocity, the electron beam 44 irradiates the affected area 45 with a much larger amount than the other normal cell tissues. Then, by controlling the rotation speed of the electron beam linear acceleration irradiation device 43, the electron beam 44 irradiated to the center of the affected area 45 can be made to have a required constant amount.

FIG. 5A shows a schematic side view of the electron beam linear acceleration irradiation apparatus, and FIG. 5B shows a schematic bottom view of the electron beam linear acceleration irradiation apparatus. In FIG. 5, the electron beam linear acceleration irradiation device 43 is substantially L-shaped and is supported by a supporting device (not shown). Further, the electron beam linear acceleration irradiation device 43 has an electron beam irradiation unit 50 on the upper lower surface thereof, and rotates about a rotation center 51 while irradiating an electron beam from this portion. The electron beam linear acceleration irradiation device 4
A rotating device for rotating 3 and an electron beam generating device for irradiating an electron beam are omitted.

FIG. 6 is a view for explaining a swivel chair in the sitting irradiation surgical treatment system. The swivel chair for a sitting irradiation surgical treatment system shown in FIG. 6 was previously proposed by the present applicant, and its outline will be described. In FIG. 6, a swivel chair 600 for a sitting irradiation surgical treatment system includes a swivel chair grounding base 611 and a swivel chair base 621.
And a seat portion 631. The swivel chair grounding base 611 enters a recess (not shown) formed in the swivel chair base 621, and the swivel chair base 621 is mounted by the X-axis direction sliding mechanism and the Y-axis direction sliding mechanism (not shown). It moves in the X-axis direction and the Y-axis direction. In the X-axis direction sliding mechanism and the Y-axis direction sliding mechanism, a rotating machine and a mechanism for converting the rotation of the rotating machine into a linear motion are fixed to the moving table. Further, the swivel chair ground base 611 includes a main motor (not shown), which rotates the swivel chair base 621. The main motor is a direct-acting type in which the rotor of the motor itself rotates, and the rotation speed detector in the rotating portion detects the rotation speed, and a control circuit (not shown) based on this rotation speed is used. Keeps the rotating speed of the rotating machine constant. A swivel chair base 621 mounted on the swivel chair grounding base 611 configured as described above.
The fine adjustment is performed in the X-axis direction and the Y-axis direction by pressing a switch of a rotating machine that drives the X-axis direction sliding mechanism and the Y-axis direction sliding mechanism, such as a foot switch. Then, by these adjustments, the rotation center of the main motor attached to the rotating chair ground base 611 is made to coincide with the rotation center of the electron beam linear acceleration irradiation device.

The swivel chair base 621 includes a swivel chair table 622, a protective cover 623 surrounding the swivel chair base 621, and an X attached to the swivel chair table 622.
It is composed of an axial sliding mechanism 624, a Y axial sliding mechanism 625, and a Z axial sliding mechanism (not shown). The X-axis direction sliding mechanism and the Y-axis direction sliding mechanism each include a table, and a rotating machine for sliding the table in each direction and a mechanism for converting the rotation into a linear direction. ing. The Z-axis direction sliding mechanism is not shown, but the swivel chair base 621 is mounted on the Z-axis sliding mechanism.
There are provided two rails for sliding in the axial direction, a sliding mechanism that can move along the rails, and a rotating machine that drives the sliding mechanism.

The Y-axis direction sliding mechanism 625 includes a seat portion 6
31 is attached. The seat 631 has an elbow pad 6
32 and a foot-up cushion 633 are attached. Further, a backrest 634 is attached to the rear of the seat 631 in a vertically movable state. Backrest 634 has back and front and backrest 635 with tilting mechanism.
And a shoulder guard 636 and a Z-axis direction sliding portion 637.
And a brain stereotaxic ring adjustment unit 638 are attached. Then, sliding of the backrest 634 in the Z-axis direction is performed by a sliding mechanism inside the backrest 634, which is not visible in FIG. In addition, a brain stereotaxic ring 639 is attached to the brain stereotaxic ring adjustment unit 638. Further, the foot-up cushion 633 of the seat 631 is provided with a footrest 640 for resting the patient's foot.

After the patient sits on the seat 631, the backrest 634 moves a Z-axis direction sliding mechanism (not shown) according to the sitting height of the patient. Further, the back and forth and backrest 635 with the tilting mechanism are adjusted to the inclination of the back of the patient. Since the positional relationship between the brain stereotaxic ring 639 and the affected part of the patient is predetermined by CT scan or the like, the center of the affected part of the brain stereotaxic ring 639 is the swivel chair base 621.
Of the swivel chair base 621 so that it becomes the center of rotation of
The axial sliding mechanism 624, the Y axial sliding mechanism 625, and the Z axial sliding mechanism (not shown) are adjusted. Similarly, in the stereotaxic fixation ring 639, the stereotaxic fixation ring adjustment part 638 and the Z-axis direction sliding part 637 are adjusted in advance.

Next, the sitting position irradiation surgical treatment system will be described. First, the swivel chair 600 is transported to the lower part of the electron beam linear acceleration irradiation device. At this time, a caster for floating movement (not shown) of the grounding base 611 for the swivel chair is projected to the lower part to facilitate the movement of the swivel chair 600. After the swivel chair 600 is moved to the predetermined position, the floating caster is housed in the swivel chair grounding base 611, and the swivel chair 600 is fixed at that position. Next, in order to match the center of rotation of the electron beam linear acceleration irradiation device in the vertical plane with the center of rotation of the rotary chair 600 in the horizontal plane, the X-axis direction sliding mechanism 624 of the grounding base 611 for the rotary chair and the Y-axis slide mechanism 625 by sliding <br/>, moving the center of rotation of the chair 600. On the other hand, the brain stereotaxic ring 639 is fixed to the skull of the patient by a pin (not shown), and the positional relationship between the brain stereotaxic ring 639 and the center of the affected area is determined by CT scan or the like. After the positional relationship between the brain stereotaxic ring 639 and the center of the affected area is determined, the pseudo brain stereotaxic ring is attached to the swivel chair 600, and as described above, the rotational center of the swivel chair 600 in the horizontal plane and the electron beam linear acceleration. The adjustment is performed so that the center of rotation of the irradiation device in the vertical plane substantially coincides. After that, the patient with the stereotaxic ring 639 sits on the seat 631 of the swivel chair 600 and puts his legs on the footrest 640 to take a comfortable posture. At this time, the center of the affected part may not coincide with the center of the swivel chair 600. In such a case, if the center of the affected area is forcibly moved to the center of the swivel chair 600, the patient will be treated for a long time in an unnatural posture. In order to move the patient to the center of rotation of the swivel chair 600 in a comfortable posture, the sliding mechanism of the swivel chair base 621 is pressed by a not-illustrated foot switch or the like in the X-axis direction, Y-axis direction, and Z-axis direction sliding mechanism. Slide it. In this way, the rotation center line of the definitive in the horizontal plane round <br/> rolling chair 600, and the rotation center line of the electron beam linear accelerator irradiation device in the vertical plane, consistent with the patient's diseased heart.

[0010]

The swivel chair in the electron beam linear accelerating irradiation apparatus and the sitting irradiation surgical treatment system is a very large and expensive medical instrument. The electron beam linear acceleration irradiation device and the rotating chair in the sitting irradiation surgical treatment system rotate in different dimensions. When such a large medical device collides with a patient being treated or an operator who is adjusting, not only serious injury to human body but also expensive medical device may be damaged due to contact or collision between medical devices. To be done. In addition, the swivel chair used in the sitting irradiation surgical treatment system has a complicated shape. For example, protruding parts such as the brain stereotaxic ring adjustment part, shoulder guard part, elbow rest part or footrest part may rotate the swivel chair in a horizontal plane, or the electron beam linear acceleration irradiation device in a vertical plane. If it is not rotated with, it cannot be determined whether there is a contacting part. Further, when the patient sits on the swivel chair, it is difficult to accurately confirm how much the patient's arms, knees, toes and the like protrude from the swivel chair.

The present invention has been made to solve the above-mentioned problems, and an electron beam linear accelerating irradiation device and a rotating chair in a sitting irradiation surgical treatment system or a patient sitting on the rotating chair or an operator of the rotating chair is provided. An object of the present invention is to provide a safety device in a sitting irradiation surgical treatment system that does not collide or come into contact with the patient. Further, another object of the present invention is to provide a safety device in a sitting irradiation surgical treatment system having high safety by devising a mounting arrangement of a sensor attached to the safety device in the sitting irradiation surgical treatment system.

[0012]

To achieve the above object, a safety device in a sitting irradiation surgical treatment system according to the present invention comprises a safety device structure including a sensor arrangement.
The invention is composed of the invention and the second and third inventions having an efficient sensor arrangement.

(First Invention) A safety device in a sitting irradiation surgical treatment system includes an electron beam linear acceleration irradiation device that irradiates radiation while rotating in a vertical plane centered on an affected area, and a vertical axis that passes through the center of the affected area. And a first fixing device (12 in FIG. 1 and FIG. 2) on the peripheral edge of the radiation irradiation part of the electron beam linear acceleration irradiation device .
Therefore , the sensor support ring (11 in FIG. 1 and FIG. 2) attached and fixed so as to be attached to the sensor support ring (11) and changeable in the X-axis direction, the Y-axis direction, and the Z-axis direction. At least one sensor support rod (14 in FIGS. 1 and 2) with a possible second fixing device (17 to 22 in FIG. 3), and the second fixing device (17 to 22). Sensor support rod (1
4), double, each attached to different orientations
Number of sensors for detecting intruding objects (1 to 4 in FIGS. 1 and 2), and a safety control device for stopping the rotation of the electron beam linear acceleration irradiation device by the output of at least one of the sensors (1 to 4) (FIG. 1 and 16) in FIG.

(Second Invention) A circumference of a radiation irradiation section in the electron beam linear acceleration irradiation device.
Two sensor support rods (14, 1) attached to the edges
5) is 90 degrees away from the irradiation center of radiation, and is vertical to each other in the vertical plane of rotation or the vertical plane of rotation.
It is arranged so as to face the left-right direction when viewed from the side .

(Third invention) The directions of the plurality of sensors (1 to 4) in the safety control device (16) are sensed by an object other than the inside of a predetermined frustoconical shape of the swivel chair and output. It is configured to operate the safety control device (16).

[0016]

[Operation] (First invention) An electron beam linear acceleration irradiation device irradiates an affected area with an electron beam while rotating in a vertical plane centered on the affected area. on the other hand,
Patients As can be treated for radiation in a state of sitting, swivel chair sitting the patient has a structure that allows rotation in a horizontal plane centered on the vertical line axis passing through the center of the affected area. That is, the grounding base for a swivel chair to which the patient's seat is attached is transported so as to be the center of rotation of the electron beam linear acceleration irradiation device, and is fixed there. Then, by the sliding mechanism in the X-axis direction and the Y-axis direction provided on the rotating chair grounding base, the rotation center of the electron beam linear acceleration irradiation device and the rotation center of the rotating chair are finely adjusted. It Then, while the patient is sitting on the seat of the swivel chair, the slide mechanism in the X-axis direction, the Y-axis direction, and the Z-axis direction provided on the swivel chair base prepositions the CT scan. The center of the affected area and the center of rotation of the swivel chair are finely adjusted so that they coincide with each other. When the patient is rotated by the rotation of the main motor mounted on the grounding base for the swivel chair by the above adjustment, the center of the affected area of the patient and the center of rotation of the electron beam linear acceleration irradiation device coincide with each other. In this state, the radiation beam emitted from the electron beam linear accelerator irradiation device rotating center and the inside vertical surface of the affected area, about a vertical line axis passing through the vertical plane in which the electron beam linear accelerator irradiation device is rotated The affected area rotating in the horizontal plane is irradiated.

During such treatment or preparation for treatment, the electron beam linear acceleration irradiation device may contact or collide with the swivel chair, the patient , the operator , or the like . Safety device to prevent the contact or collision in advance is attached by a first fixing device to the peripheral portion of the radiation irradiation section of the electron beam linear accelerator irradiation device. The safety device comprises, for example, a sensor support ring that supports a sensor attached to the peripheral portion. The sensor support ring is provided with at least one sensor support rod. In addition, this sensor support rod,
Each of the plurality of sensors is attached by the second fixing device so as to be rotatable in the X-axis direction, the Y-axis direction, or the Z-axis direction. Then, these sensors are always fixed to different orientations, rotated territory of the radiation irradiation section
Detects objects that enter the area . In this way, at least one of the plurality of sensors attached to at least one sensor support rod is used to rotate the radiation irradiation unit in the rotation region.
When there is an intruding object , this is immediately detected and the output from the safety device stops the rotation of the electron beam linear acceleration irradiation device.

[0018] (second invention) and two with the sensor supporting rod, these arrangements, together with a right angle from the irradiation center of the radiation of the electron beam linear accelerator irradiation device, or the vertical direction, to each other in a rotational vertical plane Vertical rotation
It is arranged so as to face the left-right direction when viewed from the surface side. Electron beam
The radiation irradiation part in the linear acceleration irradiation device is in the vertical plane.
While rotating around the patient's affected area, the swivel chair
Rotates about the patient's affected area in a horizontal plane. There
The sensor support phosphorus attached to the radiation irradiation unit.
Are mounted on a surface perpendicular to the direction of radiation.
It In addition, the two sections attached to the sensor support ring
The sensor support bar is used when the radiation irradiation unit rotates and descends.
If not, they will not be installed in the same direction. That is, in the radiation irradiation unit of the electron beam linear acceleration irradiation device, the first
Two sensor supports attached by the fixing device of
One side of the
They are arranged to point in different directions. Further, a plurality of sensors provided in the sensor supporting rod, the second stationary
Depending on the device , it may be fixed in different directions.
It is for, or projections Tsu there somewhere in the swivel chair, a
If there is an intruder during medical treatment , at least one of the sensors is arranged to detect it and operate the safety device.
Has been .

(Third invention) The sensors attached to the respective sensor support rods have different directions, and when an object is present other than inside the virtual truncated cone of the swivel chair, the sensor detects it. Arranged to operate the safety device. The safety device in the sitting irradiation surgical treatment system of the present invention operates by changing the orientations of a large number of sensors so that the electron beam linear acceleration irradiation device does not come into contact with or collide with the swivel chair, or the patient or operator, The rotation of the electron beam linear acceleration irradiation device is stopped.

[0020]

EXAMPLE FIG. 1 is a top view of a sensor support ring provided with a safety control device and a sensor according to an embodiment of the present invention. FIG. 2 is a side view of the sensor support ring.
In Figure 1, the sensor support ring 11, a fixing device 12 for fixing when attached to the periphery of the radiation irradiation section of the electron beam linear accelerator irradiation device, at least one sensor support rods 14 and 15 to be described later A bracket 13 for attachment, at least one sensor support rod 14, 15 attached to the bracket 13, and a safety control device 16 attached to the sensor support ring 11.
And a plurality of sensor horizontal support bases 17 for mounting the sensors mounted on the sensor support rods 14 and 15.
, And the sensors 1, 2, 3, 4, ... Attached to each sensor horizontal support base 17. Also,
The sensor support ring 11 is, for example, an electron beam linear acceleration illumination.
Along the peripheral edge of the housing that constitutes the radiation irradiation unit
By fitting and tightening the fixing device 12,
Attached. The sensor support rods 14 and 15 are
For example the center of the sensor carrier ring 11, i.e., are provided two spaced at right angles from the irradiation center of the radiation irradiation unit. Further, the sensor support rods 14 and 15 are used for the sensor support rod 1 when the electron beam linear acceleration irradiation device rotates in a vertical plane.
One of the parts 4 and 15 faces upward, and the other faces downward. That is, the sensor support rods 14 and 15
Mounted in a horizontal plane, as shown in FIG.
Assuming that, when viewed from the left side of the paper
When rotating in the vertical direction of the paper in this state,
When the sensor support bar 14 of the
The support bar 15 faces downward. Furthermore, as shown in FIG. 2 , the sensor support rods 14 and 15 are provided so as to extend outward from the horizontally arranged sensor support ring 11. It is desirable that the angle at which the sensor support rods 14 and 15 are spread be an angle substantially along the outer peripheral surface of the truncated cone of the swivel chair. For example, the sensor support bar 14,
When one of the 15 is lowered, the sensor support ring 1
The angle between 1 and the sensor support bar 14 or 15 is the above rotation.
The angle between the outer surface of the frusto-conical surface of the chair and the floor is approximately
Let it hit. With this structure,
Object detection attached to the example sensor support bar 14, 15
Is the rotating sensor of the electron beam linear acceleration irradiation device?
Electron beam linear acceleration irradiation equipment
Stop the operation of the table.

The mounting of the sensor will be described with reference to FIG. 3A and 3B are enlarged views of the sensor mounting portion. 3A and 3B, the sensor vertical support member 18 to which the sensor 1 is attached
Is mounted on the sensor horizontal support stand 17 so as to be freely rotatable in a horizontal plane by a rotation shaft 19 in the horizontal plane. Then, the sensor 1 is mounted in a desired direction and then fixed by the fixing member 20. Also, the sensor 1
Is attached to the sensor vertical support member 18 so as to be rotatable about a vertical in-plane rotation shaft 21, and then fixed by a fixing member 22. That is, the sensors 1, 2, 3, 4, ...
.. can be mounted in desired directions in horizontal and vertical planes.

The sensors 1, 2, 3, 4, ... Are proximity switches using near infrared rays, and known ones can be used. Proximity switch using near infrared,
It is composed of a light emitting element that emits near infrared rays, an optical means that collects the emitted near infrared rays when it hits an object, and collects the reflected near infrared rays, and a light receiving element that receives the near infrared rays collected by the optical means. . The near-infrared rays emitted from such a proximity switch hit an object at a predetermined distance, and when reflected from there, the reflected near-infrared rays are condensed by the optical means to operate the light receiving element. The output of the light receiving element is detected by the safety control device 16 shown in FIGS. 1 and 2 through a line (not shown), and the rotation of the electron beam linear acceleration irradiation device is stopped. Sensors 1, 2,
, 3, ... Are attached at different angles. That is, as shown as an example in FIG. 2, the sensors 1 to 4 are slightly changed in angle in the horizontal plane and the vertical plane. Although not shown, a sensor is similarly attached to the sensor support rod 15. In this way, if the angle of each sensor is slightly shifted and attached, the rotating chair 600 can rotate.
When there is a protrusion from the inside of the virtual truncated cone to the outside, the near infrared rays emitted from the sensor are reflected by this protrusion and focused on the proximity switch to operate the safety control device 17. ing.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments. And
Various design changes can be made without departing from the present invention described in the claims. For example, the proximity switch described in the present embodiment can be a far infrared ray or an optical switch in addition to the near infrared ray. At this time, needless to say, the light receiving element and the like may be slightly changed. Further, as the means for rotatably attaching the sensor to the sensor support rod, known means other than this embodiment can be adopted.

[0024]

According to the present invention, a plurality of sensors attached change the orientation to the radiation beam irradiating portion of the electron beam linear accelerator irradiation device detects what projects from all parts of the swivel chair, safety The device is activated to stop the rotation of the electron beam linear acceleration irradiation device. Further, according to the present invention, two sensor support rods to which the sensor is attached are arranged at right angles,
When one of them faces upward, the other is attached so as to face downward. Therefore, during rotation, it is always wary of protrusions from the vertical direction or the horizontal direction. Therefore,
The safety device of the present invention can cover the entire area around the swivel chair.

[Brief description of drawings]

FIG. 1 is a top view of a sensor support ring including a safety control device and a sensor according to an embodiment of the present invention.

FIG. 2 is a side view of a sensor support ring.

3A and 3B are enlarged views of a sensor mounting portion.

FIG. 4 is an explanatory diagram showing a state in which an affected area of a patient is irradiated with an electron beam for treatment using an electron beam linear acceleration irradiation device.

5A is a schematic side view of the electron beam linear acceleration irradiation device, and FIG. 5B is a schematic bottom view of the electron beam linear acceleration irradiation device.

FIG. 6 is a diagram for explaining a swivel chair in the sitting irradiation surgical treatment system.

[Explanation of symbols]

 1, 2, 3, 4, ... Sensor 11 ... Sensor support ring 12 ... Fixing device 13 ... Bracket 14, 15 ... Sensor support rod 16 ... Safety control device 17 ... Sensor horizontal support 18 ... Sensor vertical support member 19 ... Horizontal rotation axis 20 ... Fixing member 21 ... Vertical rotation axis 22 ... Fixing member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display area A61G 15/06

Claims (3)

[Claims] 1. An electron beam linear acceleration irradiation device that irradiates radiation while rotating in a vertical plane centered on the affected area, and a rotating chair that rotates in a horizontal plane about a vertical axis passing through the center of the affected area. In a safety apparatus for a sitting irradiation surgical treatment system, the sensor support ring attached by the first fixing device to the peripheral portion of the radiation irradiation section of the electron beam linear acceleration irradiation apparatus, and the X-axis attached to the sensor support ring. direction, Y-axis direction, and Z-axis and at least one sensor support rod having a second fixing device capable of fixing to be redirected in a direction, the sensor support rod by said second solid <br/> constant device A plurality of intruding object detection sensors, each mounted in different directions,
A safety control device for stopping the rotation of the electron beam linear acceleration irradiation device by the output of at least one of the sensors, and a safety device in a sitting irradiation surgical treatment system. 2. The emission in the electron beam linear acceleration irradiation device.
The two sensor support rods attached to the peripheral portion of the radiation irradiating unit are separated from each other by 90 degrees from the irradiation center of the radiation , and are vertically arranged in the rotation vertical plane , or the rotation vertical plane
The safety device in the sitting irradiation surgical treatment system according to claim 1, wherein the safety device is arranged so as to face the left-right direction when viewed from the side . 3. The orientation of the plurality of sensors is sensed and output by the swivel chair to an object other than the inside of a predetermined frustoconical shape, and the safety device is operated.
Alternatively, the safety device in the sitting irradiation surgical treatment system according to claim 2.