JP2839432B2 - Radiotherapy equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiotherapy apparatus for treating a diseased part by focusing a radiation on the diseased part while rotating the apparatus body around the diseased part.

[0002]

2. Description of the Related Art FIG. 7 is a perspective view of a conventional radiotherapy apparatus around a treatment table. In the figure, reference numeral 1 denotes a treatment table which is movable in X, Y, and Z directions orthogonal to each other, and has a placement section 1a for a patient M, 2 is attached to an end of the treatment table 1, and a head M1 of the patient M It is a head fixing device for fixing the head. The head fixing device 2 includes an X-direction moving unit 2a, Y that can move in the X direction.
It is composed of a Y-direction moving section 2b movable in the direction and a fixed section 2c of the head M1 movable in the Z direction. 3
And 4 are markers attached to the head fixture 2,
The marker 3 is a YZ coordinate plate vertically arranged behind the head M1, and the marker 4 is an XY coordinate plate horizontally arranged below the head M1.

A ceiling pointer 5 is mounted on the ceiling of the treatment room and emits a vertical cross ray A having a thickness of 2 to 3 mm downward in the Z direction. A ceiling pointer 6 is mounted on a side wall of the treatment room and has a thickness of 2 in front of the X direction. It is a side pointer that emits a horizontal cross ray B of up to 3 mm. Vertical cross ray A of this ceiling pointer 5
And the horizontal cross ray B of the side pointer 6 are on the same plane, and connect the intersection C.

[0004] Here, the main body of the apparatus (not shown) for emitting therapeutic radiation has a center line on a plane formed by a vertical cross light beam A and a horizontal cross light beam B, and these light beams A and B are combined. It is rotatable around the intersection C by a predetermined angle. In this case, the center line of the apparatus main body coincides with the center axis of the radiation emitted from the apparatus main body, and the focal position of the radiation is located at the intersection C between the vertical cross ray A and the horizontal cross ray B.

Next, the operation of the radiotherapy apparatus will be described. The patient M is placed on the placement section 1 a of the treatment table 1, and the head M <b> 1 is fixed by the head fixture 2. Thereafter, the coordinate value of the diseased part P of the patient M is measured by a CT device or the like using the YZ coordinate axis of the marker 3 and the XY coordinate axis of the marker 4 as reference coordinates, and according to the coordinate values, the head of the patient M is measured. Part M
Marks P1 and P2 are marked on the upper surface and the front side surface of No. 1.
Next, a vertical cross ray A and a horizontal cross ray B are respectively emitted from the pointers 5 and 6, and the treatment table 1 is moved to X so that the vertical cross ray A is projected on the mark P1 of the head M1 of the patient M.
The treatment table 1 is moved in the Z direction so that the horizontal cross ray B is projected on the mark P2 of the head M1 of the patient M while being moved in the direction and the Y direction. Then, the vertical cross ray A passes through the mark P1, and the horizontal cross ray B
After passing through No. 2, the intersection C is located at the diseased part P.

Therefore, if the apparatus main body is rotated, for example, toward the ceiling pointer 5 and the therapeutic radiation is emitted from the apparatus main body, the focus position coincides with the diseased part P. It can be treated by the focus of radiation.
Also, even if the device body is turned to the side pointer 6 side,
Since the focal position of the radiation is at the position of the diseased part P, the head M
Radiation may be applied from one side to treat the diseased part P at the focus of the radiation.

[0007]

However, in the above conventional radiotherapy apparatus, the position of the diseased part P of the patient M is such that the vertical cross light A and the horizontal cross light B of the affected part 2-3 mm hit the marks P1 and P2. However, there is a problem that the positioning accuracy of the diseased part cannot be further improved due to the limitation of the width of the cross light beam. Further, since the positions of the marks P1 and P2 attached to the head M1 of the patient M fluctuate according to the expression of the patient M, the position of the diseased part positioned based on the marks P1 and P2 is the position of the original diseased part P. There was also a problem that the position was shifted.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a radiotherapy apparatus capable of improving the positioning accuracy of a diseased part of a patient.

[0009]

According to a first aspect of the present invention, there is provided a radiotherapy apparatus comprising: a treatment table side jig which is detachably provided on a treatment table and has a fitting portion movable in a radiation direction of radiation; An apparatus body-side jig detachably provided at a radiation emitting section of the apparatus body and having a fitted portion which is located on the center line of the radiation and which can be fitted to the fitting section.

According to a second aspect of the present invention, there is provided a radiotherapy apparatus, comprising: a treatment table side jig having a fitting portion detachably provided on a treatment table and movable in a radiation direction of radiation; An apparatus main body side jig which is detachably provided on a center line of the radiation and has a fitted portion which can be fitted to the fitting portion, and the fitting portion and the fitted portion. One of the joints penetrates the other.

According to a third aspect of the present invention, there is provided a radiotherapy apparatus which is detachably provided on a treatment table and has a fitting portion, and a radiation treatment apparatus which is detachably provided on a radiation emitting section of the apparatus main body. An apparatus main body side jig having a fitted portion which is located on the center line and can be fitted with the fitting portion, and one of the treatment table side jig and the apparatus main body side jig. An elastic means is provided for enabling the fitting portion or the fitted portion to move in the radiation direction.

[0012]

In the radiotherapy apparatus according to the first aspect of the present invention, the position of the diseased part is adjusted by the treatment table side jig in the first direction of radiation and the second direction.
The treatment table is attached to the treatment table so that it can be specified by the fitting section from the direction and the treatment table is moved so that the fitting section can be fitted to the fitted section in the first direction and the second direction. Aligning the diseased part with the focus of the radiation.

In the radiotherapy apparatus according to claim 2 of the present invention, in addition to the invention according to claim 1, one of the fitting portion and the fitted portion penetrates the other. When the fitting portion is fitted to the fitted portion, the center line of the radiation coincides with the center lines of the fitting portion and the fitted portion.

According to a third aspect of the present invention, in addition to the first aspect, a fitting portion or a fitted portion is provided on one of the treatment table side jig and the apparatus body side jig. Is provided, for example, after the fitted portion of the apparatus main body is fitted to the fitting portion, the fitted portion is returned to its original position by the elastic force of the elastic means. Return to

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Embodiment 1 FIG. FIG. 1 is a perspective view of a radiotherapy apparatus according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view around the applicator of the radiotherapy apparatus, which is the same as or equivalent to the conventional radiotherapy apparatus shown in FIG. Are denoted by the same reference numerals and description thereof is omitted.

In the figure, reference numerals 7 and 8 denote first and second treatment table-side jigs which are detachably attached to the fixing portion 2c of the head fixing device 2. The first treatment-table-side jig 7 has a vertical moving unit 7a that can move up and down in the Z direction, a left and right moving unit 7b that can move left and right in the Y direction, and can move back and forth in the X direction. The vertical moving portion 7a is formed with a hole 7d as a fitting portion on a line in the first direction D1 facing in the vertical direction. The second treatment table side jig 8 includes a front-rear moving unit 8a that can move back and forth,
It comprises a left / right moving unit 8b movable left and right and a vertical moving unit 8c movable up and down.
Is formed with a hole 8d as a fitting portion on a line in the second direction D2 facing the front-rear direction. The two holes 7
d and 8d have the same size.

Reference numeral 9 denotes an apparatus main body that emits radiation for treatment and whose center line coincides with the center line of the radiation. Device body 9
Is centered on the focus position of the emitted radiation (after the positioning, this focus position is the position of the diseased part P of the patient M), and the center line of the device is aligned with the first direction D1 and the second direction D2. It is rotatable on the formed plane. 10
Is an applicator attached to the lower part of the apparatus main body 9 as a radiation emitting unit for preventing radiation from radiating, and the radiation is emitted outward in a coaxial state with the central axis L of the applicator 10.

An apparatus body side jig 11 is detachably attached to an end of the applicator 10 via a groove, and has an axis of a protruding portion 11a which is a fitting portion projecting outward. It is positioned so as to exactly coincide with the central axis L of the applicator 10. The convex portion 1 of the jig 11 of the device body side
The size 1a is a size that can be fitted without play into the holes 7d, 8d of the first and second treatment table jigs 7, 8.

Next, the operation of the radiotherapy apparatus will be described. After placing the patient M on the treatment table 1 and fixing the head M1 with the head fixture 2, the coordinate values of the diseased part P of the patient M are measured by a CT device or the like using the coordinates of the markers 3 and 4 as reference coordinates. I do. Next, the left-right moving part 7b and the front-rear moving part 7c of the first treatment table side jig 7 are moved based on the coordinate values, and the hole 7d of the vertical moving part 7a is located just above the diseased part P,
That is, the left-right moving part 7b and the front-rear moving part 7c of the first treatment-table-side jig 7 are fixed so as to be positioned in the first direction D1. Next, the left and right moving part 8b and the up and down moving part 8c of the second treatment table side jig 8 are moved, and the hole 8d of the front and rear moving part 8a is located right beside the diseased part P, that is, in the second direction D2. Thus, the left and right moving part 8b and the up and down moving part 8c of the second treatment table side jig 8 are fixed.

Next, the apparatus main body 9 is rotated so as to face the first direction D1. Then, while moving the treatment table 1 in the front-back, left-right direction, the up-down moving unit 7 of the first treatment table-side jig 7.
is moved upward, and the hole 7d of the vertical moving portion 7a and the convex portion 11a of the apparatus body side jig 11 attached to the lower end of the applicator 10 are fitted. Thereafter, the vertical moving portion 7a is moved downward to release the engagement between the hole 7d and the convex portion 11a, and then the apparatus main body 9 is moved to the second treatment table side jig 8
It is rotated by 90 degrees in the second direction D2 side.

Next, while moving the treatment table 1 up and down, the front and rear moving part 8a of the second treatment table side jig 8 is moved to the apparatus body 9 side, and the hole 8d of the front and rear moving part 8a is Convex portion 11 of apparatus body side jig 11 attached to
a is fitted. The movement of the treatment table 1 causes the second
When the hole 8d of the treatment table-side jig 8 and the projection 11a of the apparatus body-side jig 11 are fitted together, the diseased part P of the patient M is accurately positioned with respect to the apparatus body 9 (each from two directions). As a result, the focus position of the radiation radiated from the apparatus main body 9 coincides with the position of the diseased part P.

That is, the patient's diseased part P is positioned through the hole 7d of the first treatment table side jig 7 at the front, rear, left and right with respect to the apparatus main body 9, and the second treatment table side. The diseased part P is positioned at the focal position of the radiation radiated from the apparatus main body 9 by positioning the upper and lower positions with respect to the apparatus main body 9 via the hole 8d of the jig 8. However, in order to confirm that the diseased part P is positioned at the focal position of the radiation radiated from the apparatus main body 9, the apparatus main body 9 is again rotated by 90 degrees in the first direction D1 side, Vertical moving part 7a of first treatment table side jig 7
Is moved upward, and it is confirmed that the projection 11a of the apparatus body side jig 11 is fitted into the hole 7d. In this case, if a sufficient fitting cannot be obtained, the treatment table 1 is finely adjusted to confirm that they are fitted.

Next, the apparatus body 9 is again rotated by 90 degrees in the second direction D2, and the front-rear moving portion 8a of the second treatment table side jig 8 is moved back and forth, and the same operation is performed. Do. Then, the above confirmation operation is repeated, and it is confirmed that the position of the diseased part P of the patient M and the focal position of the radiation radiated from the apparatus main body 9 match without finely adjusting the treatment table 1. Then, the first and second treatment table-side jigs 7 and 8 are removed from the head fixture 2 and the apparatus body-side jig 11 is removed from the applicator 10. Then, for example, radiation is emitted from the device main body 9 toward the diseased part P from above the head M1 of the patient M, and the radiation is focused on the diseased part P to treat the diseased part P. The same treatment is performed while rotating.

As described above, the patient M with respect to the apparatus main body 9
The positioning of the diseased part P is performed through the holes 7d and 8d of the first and second treatment table-side jigs 7 and 8 and the projection 11a of the apparatus body-side jig 11. , Hole 7
The diseased part P of the patient M can be accurately positioned with respect to the apparatus main body 9 by reducing the diameters of d, 8d and the convex part 11a. In this case, the positions of the holes 7d and 8d of the first and second treatment table-side jigs 7 and 8 and the protrusion 11a of the apparatus body-side jig 11 are fixed without being influenced by the expression of the patient M. In this sense, the diseased part P of the patient M with respect to the apparatus main body 9 is more accurately positioned than in the conventional radiotherapy apparatus. Further, the pointers 5 and 6 required for positioning the diseased part P, which is conventionally required, become unnecessary.

As shown in FIG. 3, the first and second treatment table-side jigs 7 and 8 have projections 7e, which are fitting portions, on the side thereof.
The same effect can be obtained by providing the hole 8e and providing the hole 11b which is the fitted portion on the apparatus body side jig 11 side. Also, a recess may be used instead of the hole.

Embodiment 2 FIG. FIG. 4 is a perspective view of a radiotherapy apparatus according to another embodiment of the present invention, and FIG. 5 is an explanatory view showing a fitted state of a treatment table side jig and a main body side jig of the radiotherapy apparatus. (a) shows a case where the convex portion of the device body side jig is short, and (b) shows a case where the convex portion of the device body side jig is long.

In the figure, reference numeral 12 denotes an apparatus body side jig which is detachably attached to an end of the applicator 10.
The projection 12a is formed so as to exactly coincide with the central axis L. The projecting portion 12a of the device body side jig 12 penetrates the hole 7d so that the inclination of the treatment table 1 can be detected. The outer diameter is the same as the outer diameter of the projection 11a of the first embodiment. Other configurations are the same as those of the radiotherapy apparatus according to the first embodiment.

As shown in FIG. 5A, when the length of the convex portion 11a of the apparatus body side jig 11 is short, the convex
a is a hole 7d of the first and second treatment table side jigs 7, 8,
Even when the treatment table 1 is fitted to the position 8d, if the treatment table 1 is slightly inclined about the Y axis, the focus position of the radiation emitted from the apparatus main body 9 and the diseased part P of the patient M are not accurately positioned. If the protruding portion 12a of the apparatus body side jig 12 attached to the applicator 10 is long, if the treatment table 1 is inclined around the Y axis, as shown in FIG.
The protrusions 12a of the apparatus body side jig 12 and the holes 7d, 8d of the first and second treatment table side jigs 7, 8 are not sufficiently fitted. In this case, the treatment table 1 may be rotated by a small angle about the Y axis so that the fitting can be performed smoothly.

That is, the projection 12 of the apparatus body side jig 12
By making a longer than a predetermined length and penetrating through the hole 7d, the diseased part P of the patient M can be positioned with respect to the apparatus main body 9 in consideration of the inclination of the treatment table 1, and the diseased part of the patient M can be more accurate. P can be positioned. Note that the first and second treatment table side jigs 7 and 8 may be provided with long projections as fitting portions, and the apparatus body side jig 12 may be provided with holes as fitting portions. .

Embodiment 3 FIG. FIG. 6 is a sectional view around an applicator of a radiation therapy apparatus according to still another embodiment of the present invention. In the figure, 13 is a case detachably attached to the end of the applicator 10 via a groove, and 14 is a device body side jig attached to the case 13 via a spring member 15 which is an elastic member. The protruding portion 14a, which is a fitting portion that protrudes outward long, has an axis line of the applicator 10.
Are accurately positioned so as to coincide with the central axis L of
The treatment table side jig 14 is connected to the case 1 via a spring member 15.
3, but by compressing the spring member 15 and pulling the convex portion 14 a outward, the convex portion 1 is removed from the case 13.
4a can be projected outward in a state where the center axis L of the applicator 10 and the axis thereof are aligned. Other configurations are the same as those of the radiotherapy apparatus according to the first embodiment.

Therefore, in order to fit the holes 7d and 8d of the treatment table jigs 7 and 8 attached to the treatment table 1 and the projections 14a of the apparatus body jig 14, the apparatus body jig is required. 14 may be pulled out of the case 13 using a finger or the like, and the protrusion 14a may be protruded outward. In this case, the apparatus body side jig 14 is automatically Since the jig 14 is moved into the case 13, it is not necessary to move the apparatus body side jig 14 to the inside of the case 13.
Work can be facilitated. Further, in this radiotherapy apparatus, if the length of the convex portion 14a of the apparatus body side jig 14 is set to a length that can detect the inclination of the treatment table 1, the same effect as the radiotherapy apparatus of the second embodiment can be obtained. be able to.

The first and second treatment table side jigs are provided with protrusions as fitting portions which advance and retreat via a spring member, and the device body side jig attached to the applicator is provided with a fitting portion. A certain hole may be provided.

In the first to third embodiments, the first and second treatment-table-side jigs 7 and 8 are provided. However, one treatment-table-side jig is connected to the first direction D1. The same effect can be obtained by replacing the second direction D2 with the second direction D2.

[0034]

As described above, according to the radiotherapy apparatus according to the first aspect of the present invention, the side of the treatment table having a fitting portion detachably provided on the treatment table and movable in the radiation direction of radiation. A jig and a device main body side jig detachably provided on a radiation emitting portion of the device main body and having a fitted portion which is located on a center line of the radiation and can be fitted with the fitting portion; The treatment table-side jig is attached to the treatment table so that the position of the part can be specified by the fitting part from the first direction and the second direction of the radiation, and the fitting part is provided in the first direction and the second direction. By moving the treatment table so that the diseased part can be fitted to the fitted part, the diseased part of the patient is positioned with respect to the apparatus main body. Determined by the fitting accuracy with the joint, the positioning accuracy of the diseased part is There is an effect of the above. In addition, the position of the diseased part is specified by the treatment table side jig and the apparatus main body side jig, and when positioning the diseased part, the conventional inconvenience of being affected by a change in the expression of the patient is eliminated. . Further, there is an effect that expensive pointers conventionally required for positioning the diseased part can be reduced.

According to the radiation therapy apparatus of the second aspect of the present invention, in addition to the configuration of the first aspect, one of the fitting portion and the fitted portion penetrates the other. Therefore, in addition to the effect of the first aspect, when the fitting portion is fitted to the fitted portion, the center line of the radiation coincides with the center lines of the fitting portion and the fitted portion. There is also the effect that the radiation is accurately focused on the diseased part.

According to the third aspect of the present invention, in addition to the configuration of the first aspect, a fitting portion or a cover is provided on one of the treatment table side jig and the apparatus body side jig. Since the elastic means for moving the fitting part in the radiation direction is provided, in addition to the effect of claim 1, for example, after the fitting part of the apparatus body is fitted to the fitting part, the elastic means The engaged portion returns to the original position due to the applied force, and in addition to the effect of claim 1, there is also an effect that the workability for positioning the diseased part is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a radiotherapy apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view around an applicator of the radiation therapy apparatus of FIG. 1;

FIG. 3 is a perspective view of a radiotherapy apparatus according to a modification of the first embodiment of the present invention.

FIG. 4 is a perspective view of a radiotherapy apparatus according to Embodiment 2 of the present invention.

5A and 5B are explanatory diagrams of a fitting state of a treatment table side jig and an apparatus main body side jig of the radiotherapy apparatus of FIG. 4, and FIG. 5A illustrates a case where a convex portion of the apparatus main body side jig is short. (B) shows a case where the convex portion of the apparatus body side jig is long.

FIG. 6 is a sectional view around an applicator of a radiation therapy apparatus according to Embodiment 3 of the present invention.

FIG. 7 is a perspective view around a treatment table of a conventional radiation therapy apparatus.

[Explanation of symbols]

 Reference Signs List 1 treatment table 7 first treatment table side jig 7d hole (fitting part) 7e convex part (fitting part) 8 second treatment table side jig 8d hole (fitting part) 8e convex part (fitting) 9) Device body 10 Applicator (radiation emitting portion) 11 Device body side jig 11a Convex portion (fitted portion) 11b Hole (fitted portion) 12 Device body side jig 12 Convex portion (fitted portion) Joint part) 14 Device body side jig 14a Convex part (part to be fitted) D1 Vertical direction (first direction) D2 Front and rear direction (second direction) M Patient P Diseased part

Claims (3)

(57) [Claims] After moving a treatment table on which a patient is placed and aligning a diseased part of the patient with a focal position of radiation emitted from the apparatus main body, while rotating the apparatus main body around the diseased part, A radiation treatment apparatus for treating a diseased part by focusing the radiation on the diseased part, a treatment table side jig having a fitting part detachably provided on the treatment table and movable in a radiation direction of the radiation. And a device body side jig detachably provided on a radiation emitting portion of the device body and located on a center line of the radiation, and having a fitted portion that can be fitted with the fitting portion, The treatment table side jig is attached to a treatment table so that the position of the diseased part can be specified by the fitting section from the first direction and the second direction of the radiation, and the first direction and the 2 in the direction of The radiation treatment apparatus, wherein the treatment table is moved so as to be able to be fitted to a fitting part, and the diseased part is positioned at the focal point of the radiation. 2. After moving the treatment table on which the patient is placed and aligning the diseased part of the patient with the focal position of the radiation emitted from the apparatus main body, while rotating the apparatus main body around this diseased part, A radiotherapy apparatus for irradiating the diseased part with the focus of the radiation to treat the diseased part, wherein the treatment table side treatment includes a fitting part detachably provided on the treatment table and movable in a radiation direction of the radiation. And a device body side jig detachably provided on a radiation emitting portion of the device body and having a fitted portion which is located on a center line of the radiation and can be fitted with the fitting portion. And at least one of the fitting portion and the fitted portion penetrates the other, and the position of the diseased part is set in the first direction and the second direction of the radiation. So that it can be specified by the joint The treatment table is attached to the treatment table, and the treatment table is moved in the first direction and the second direction so that the fitting section can be fitted to the fitted section. A radiation treatment apparatus, wherein the position of the radiation treatment is adjusted to the focal point of the radiation. 3. After moving the treatment table on which the patient is placed and positioning the diseased part of the patient at the focal position of the radiation emitted from the apparatus main body, while rotating the apparatus main body around the diseased part, A radiation treatment apparatus for irradiating the diseased part with a focus of the radiation to treat the diseased part, a treatment table side jig detachably provided on the treatment table and having a fitting part, and radiation emission of the apparatus body An apparatus body side jig detachably provided on the unit and having a fitted part which is located on the center line of the radiation and can be fitted to the fitting part, and the treatment table side jig And elastic means for allowing the fitting portion or the fitted portion to move in the radiation direction is provided on one of the apparatus body side jigs, and the position of the diseased part is determined by the first direction of the radiation and the From the direction of 2 The treatment table side jig is attached to the treatment table so that the treatment table can be fixed, and the treatment table is fitted so that the fitting section can be fitted to the fitted section in the first direction and the second direction. A radiation therapy apparatus, wherein the apparatus moves and aligns the diseased part with the focal point of the radiation.