JP2003024459A - Radiation therapy equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide radiation therapy equipment capable of performing a precise treatment in a short time by precisely positioning radiation to a lesion only by driving a radiation part without driving a treatment table. SOLUTION: This equipment comprises a drive part 145 rotatably connected to an equipment body and a radiation head part 133 housed in the drive part 145, wherein the radiation is irradiated from the head part 144 while rotating the drive part 145 to treat the lesion I. A circular arc route 145A is formed in the drive part 145 in the direction crossing the rotating direction of the head part 144, so that the head part 144 can reciprocate along the route 145A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation treatment apparatus capable of accurately aligning radiation with an affected area and performing accurate treatment in a short time.

[0002]

2. Description of the Related Art A conventional radiotherapy apparatus using the rotary irradiation method is constructed, for example, as shown in FIG. In the figure, 31 is a main body of the apparatus, 32 is a housing accommodating a radiation generator, and this housing 32 is a horizontal direction in the longitudinal direction including an affected part I of a patient on a treatment table 33 which is horizontally supported by a support 33A. It is configured to be rotatable around an axis (y-axis in the figure). 34 is an X-ray generator housed in the housing 32,
Reference numeral 5 denotes a first-stage collimator that limits an irradiation area (hereinafter, referred to as “irradiation field”) of X-rays emitted from the X-ray generator 34, and reference numeral 36 denotes a pair of collimator leaves 36A for the X-rays from the first-stage collimator 35. , 36B are moved in the y direction to limit the Y collimator (see FIG. 21), and 37 is an X collimator that further moves the pair of collimator leaves 37A and 37B in the x direction to limit the X-ray limited by the Y collimator 36. Is.

Next, the operation will be described. In the case of the radiotherapy apparatus shown in FIG. 20, the X-rays generated by the X-ray generator 34 are first limited in X-ray irradiation by the first-stage collimator 35 fixed in the housing 32, and then the Y collimator 36. Is driven to change its opening, the collimator 36 limits the irradiation field in the y direction symmetrically with the x axis,
Further, when the X collimator 37 is driven to change its opening, the collimator 37 reaches the affected area I in a state where the irradiation field in the x direction is symmetrically limited to the y axis. And the housing 3
By rotating 2 around the y-axis, the X-ray irradiation direction is changed by 360 °, and the exposure dose to the normal tissue is dispersed in the xz plane (shown in B in the same figure) as shown in FIG. I am trying to reduce it.

Another conventional radiotherapy apparatus using the rotary irradiation method is constructed, for example, as shown in FIG. As shown in FIG. 20, this radiotherapy apparatus uses a device main body 41 having a high frequency electric field generating part and a microwave input from the high frequency electric field generating part of the device main body 41 as shown in FIG. A housing 42 configured to accelerate an electron beam to irradiate an X-ray or an electron beam by rotating the housing 42 around the treatment table 43 around the y-axis. It is configured to emit radiation to. Further, in the housing 42, an electron generator 44 that generates an electron beam, an electron accelerator 45 that accelerates the electron beam of the electron generator 44 to the speed of light using the microwave, and the electron accelerator 45. The deflection electromagnet 46 that deflects the electron beam accelerated by the beam in the direction orthogonal to the treatment table 43, and the target 4 that generates X-rays when the electron beam deflected by the deflection electromagnet 46 is irradiated.
7 and a collimator 48 that limits the X-rays emitted from the target 47. And
In order to perform X-ray treatment, X-rays are applied to the affected area I of the patient on the treatment table 43 with the irradiation field limited by the collimator 48, and the treatment is performed. 4
3A is a support table for the treatment table 43.

Next, the operation will be described. To treat a patient, first, the position of the affected part I in the patient and the affected part I
Is obtained by a diagnostic device such as X-ray CT, and then the treatment planning device decides the electron beam to be irradiated, the X-ray line type, energy and irradiation field. Then, when the treatment is performed, x-z is performed while the housing 42 rotates a maximum of 270 ° in the left-right direction of the patient around the affected part I of the treatment table 43 of the patient.
The affected area I is two-dimensionally irradiated within the plane to treat the affected area I. When the affected area I is three-dimensionally irradiated, the patient's setting state is changed, the affected area I is positioned again, and then the two-dimensional irradiation is similarly performed.

[0006] Still another conventional radiotherapy apparatus using the rotary irradiation method is constructed, for example, as shown in FIG. As shown in FIGS. 2A and 2B, the present radiation therapy apparatus includes a fixed apparatus body 51 and a housing rotatably disposed in the apparatus body 51, as in the above radiation therapy apparatuses. 52 and a radiation source 54 of the irradiation head portion extended from the housing 52, and the affected part of the patient while rotating the housing 52 around the treatment table 53 as shown by the arrow (b) in the figure. The collimator 55 irradiates the (isocenter) I with the irradiation field of the radiation X being limited. Reference numeral 56 is a bearing for rotation.

Next, the operation will be described. As shown in (a) and (b) of FIG. 25, when the affected part I is near the surface of the human body of the patient, the isocenter I is adjusted to it.
The collimator 55 irradiates the affected area I of the patient on the treatment table 53 with the radiation X from the radiation generation source 54 while limiting the irradiation field. Further, as shown in FIGS. 26 (a) and 26 (b), when the affected part I is near the center of the human body, the isocenter I is moved accordingly, and the housing 52 is rotated while the affected part I is rotated.
And the treatment is performed with the radiation dose to the normal tissue suppressed as much as possible.

When it is necessary to intensively irradiate the affected area I with radiation, the treatment table 53 can be moved vertically or horizontally as shown by the arrow in FIG. 27, or rotated as shown in FIG. Irradiation to normal tissue is suppressed, and as shown in FIG. 29, when treatment is to be performed while avoiding the important organ I1, the treatment table 53 is driven to align the affected area I with the isocenter. .

FIG. 30 is a diagram showing a conventional medical linac, and this device is similar to the above-mentioned radiation therapy devices.
The apparatus main body 71, the housing 72, the treatment table 73, the radiation source 74, and the collimator 75 are provided, and the patient's affected part I on the treatment table 73 is irradiated with the radiation X while rotating around the y-axis for treatment. It is configured and operates similar to that described above.

Further, FIG. 31 shows a three-dimensional irradiation beam machine for head treatment with cobalt 60, which is called a γ knife, 74A is a cobalt 60 radiation source having about 200 pieces, and 75A is radiation from a cobalt 60 radiation source. A collimator I for narrowing down is a concentration point where radiation is concentrated, and the same reference numerals as those in FIG. 30 denote the same or corresponding portions. Explaining the operation of the three-dimensional irradiation ray machine for head treatment, the radiation from the cobalt 60 radiation source 74A is focused by the collimator 75A and is focused on the affected area I of the patient. This time,
About 200 pieces of radiation are arranged three-dimensionally around the head, so the radiation is dispersed and incident on the head surface,
While the dose at each site is low, the affected area I can be irradiated with the dose required for treatment. Incidentally, 79 is a fixture for fixing the head.

[0011]

However, in the case of the conventional radiation treatment apparatus shown in FIG.
When irradiating radiation such as rays and electron beams, the irradiation direction of radiation is limited to two dimensions, so when performing three-dimensional irradiation, it is necessary to attach a device that changes the patient state and irradiation direction each time. Furthermore, if the affected part I of the patient is changed from the irradiation position every time the affected part I is changed, there is a problem that the normal tissue is more exposed to the patient and the patient is burdened.

Further, in the conventional radiotherapy apparatus shown in FIG. 24, when it is necessary to intensively irradiate the affected area I, the irradiation of normal tissue is increased by that much even if rotational irradiation is performed. Further, if the treatment table 53 is moved vertically or horizontally as shown by the arrow in FIG. 27 or rotated to suppress irradiation of normal tissue as much as possible as shown in FIG. 28, the drive mechanism of the treatment table 53 becomes complicated. Therefore, there is a problem that it is difficult to perform highly accurate treatment because the patient and the affected area I are displaced from the original irradiation position due to the movement of the treatment table 53. Also, FIG.
As shown in FIG. 9, when the treatment should be performed while avoiding the important organ I1, there is a problem that the positioning of the treatment table 53 is very difficult.

Further, in the radiotherapy apparatus shown in FIG. 31,
Radiation can be concentrated three-dimensionally on the affected area I, but since about 200 cobalt 60 and collimator 75A are required, the manufacturing cost of the device is high and the half-life of cobalt 60 is every 5 years. In addition, the radiation source 75A must be replaced, management is complicated, and it is difficult to position the radiation on the affected area I, and it takes a long time for treatment.

The present invention has been made to solve the above-mentioned problems, and it is possible to accurately align radiation to a diseased part by driving the irradiation part without driving the treatment table, and to shorten the accurate treatment. It is an object of the present invention to provide a radiation treatment apparatus that can be performed in time.

[0015]

In the radiation treatment apparatus according to claim 1 of the present invention, an arcuate path is formed in the rotating body in a direction intersecting with the rotation direction of the irradiation section, and the irradiation section is the path. It is configured to be able to reciprocate along.

Further, in the radiotherapy apparatus according to claim 2 of the present invention, the rotating body has an arc shape and has an irradiation portion at its end, and the rotating body is irradiated with the irradiation portion at a connecting portion with the apparatus body. It is configured to be able to reciprocate in a direction intersecting with the rotation direction of the part.

Further, in the radiotherapy apparatus according to claim 3 of the present invention, the apparatus main body is constructed so as to be movable in an arc shape centered on the isocenter.

Further, in the radiotherapy apparatus according to claim 4 of the present invention, the rotating body is formed in an arc shape with the isocenter as a center point, and the rotating body is irradiated so that the radiation is concentrated at the isocenter. A plurality of parts are arranged in a distributed manner.

According to a fifth aspect of the present invention, there is provided a radiotherapy apparatus, an apparatus main body, a movable body movable in an arc shape with respect to the apparatus main body, and a bearing provided on the movable body via a bearing. A rotating body rotatable about the center and an irradiation section housed in the rotating body are provided, and with respect to the movement of the moving body, the affected area is on the central axis of the bearing, and the central axis and The line connecting the irradiation part and the affected part is always orthogonal to each other.

[0020]

According to the first aspect of the present invention, with the treatment table fixed, the irradiation unit reciprocates along the arcuate path intersecting the rotational direction of the irradiation unit and moved. It is possible to three-dimensionally irradiate the affected area by irradiating radiation while rotating the irradiation area around the affected area at each position on the path.

According to the second aspect of the present invention, the rotating body reciprocates in the direction intersecting the rotating direction of the irradiation unit at the connecting portion with the apparatus body while the treatment table is fixed. Then, the irradiation part can be irradiated three-dimensionally by irradiating radiation while rotating the irradiation part around the affected part at each moved position.

According to the third aspect of the present invention, the irradiation unit can be easily aligned with the isocenter simply by moving the apparatus main body in an arc shape with the isocenter as the center while the treatment table is fixed. The radiation can be focused on the affected area.

Further, according to the invention of claim 4 of the present invention, when the irradiation section irradiates the radiation, the radiation concentrates on the affected area from a plurality of positions of the rotating body to the isocenter, and the rotating body is rotated in this state. The affected area can be three-dimensionally and intensively treated.

According to the fifth aspect of the present invention, the affected part is located on the central axis of the bearing with respect to the movement of the moving body, and the central axis is connected to the irradiation part and the affected part. And are always orthogonal to each other, and when the rotating body is rotated around the affected area to intensively treat the affected area three-dimensionally, the irradiation of radiation does not concentrate on a part of the normal area.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on the embodiments shown in FIGS. Example 1. As shown in FIG. 1, the radiation treatment apparatus according to the present embodiment includes a fixed apparatus body 141 and the apparatus body 14
1, the housing 142 rotatably arranged and the irradiation head section 144 connected to the housing 142 are provided on the treatment table 14.
Radiation is applied to the affected area I of the patient while rotating around 3 around the y axis. The irradiation head section 144 is connected to a drive section 145 extending horizontally from the housing 142 along the treatment table 143.
A patient's affected part I on the treatment table 143 can be moved along an arcuate path 145A formed on the treatment table 145. That is, a motor (not shown) is provided in the irradiation head section 144, and the irradiation head section 144 reciprocates along the path 145A via the gear 146 of this motor. Therefore, the irradiation head section 144 is formed by rotating together with the housing 142, and has an arcuate path 145 centered on the affected area I in the direction orthogonal to the rotation surface in the xy plane.
It moves along A and irradiates the affected area I with radiation to three-dimensionally irradiate the affected area I. In addition, the drive unit 145
Is configured as a drive system independent of the housing 142.
143A is a support table for the treatment table 143.

Next, the operation will be described. First, FIG.
When the irradiation head section 144 is located at C, the radiation of the irradiation head section 144 is irradiated in a direction perpendicular to the treatment table 143 to treat the affected area I, and when the housing 142 is subsequently rotated, the irradiation head section is irradiated. The 144 rotates in the xz plane, and radiation is applied from the circumference of the xz plane in which the irradiation head part 144 moves to perform treatment by two-dimensional irradiation.
Next, after driving the gear 146 to D ′ to position the irradiation head section 144 at D in FIG. 2 and irradiating radiation from the irradiation head section 144 in the same manner, the circumference drawn at the position C is obtained. The intersecting circumference can be drawn and the surroundings can be treated at different parts of the affected area I. Further, the gear 146 is driven to E ′ to move the irradiation head section 144 to the position shown in FIG.
When the radiation is similarly applied from the irradiation head portion 144 after being positioned at E, a circle intersecting with the circles drawn at the positions C and D is drawn, and further from different directions of the affected area I. The area around it can be treated.

As described above, according to this embodiment, the gear 146 is driven to move the irradiation head section 144 to the path 14.
The affected area I can be set by sequentially setting different positions of 5A.
Thus, spherical irradiation, that is, three-dimensional irradiation treatment can be performed to disperse the irradiation dose to the normal tissue and suppress the exposure dose to the normal tissue. The drive unit 145 and the jig can be appropriately changed in irradiation range by changing their forms according to the necessity of treatment.

Example 2. The radiation therapy apparatus of this embodiment is
As shown in FIG. 3, a fixed device main body 151 and an arcuate arm 152 centered on the isocenter I, which is rotatably arranged with respect to the device main body 151, are provided.
A radiation generator 1 that irradiates the arm 152 with radiation.
54 and a collimator 155 for limiting the radiation irradiation field from the radiation generation unit 154, and irradiates the affected area I of the patient on the treatment table 153 while rotating the arm 152 with the rotation bearing 156. ing.
In addition, the arm 152 has rails 15 along its side surface.
7 is provided, and the motor 158 is provided via this rail 157.
Is transmitted to the arm 152 to move the arm 152 from one end to the other end as indicated by the arrow in the figure. Further, a radiation detector 159 is arranged at the other end of the arm 152 so as to face the irradiation head portion 156, and the radiation detector 159 can detect the radiation distribution state in the affected area I in real time. It is like this. 153A is a support table for the treatment table 153.

The arm 152 is, for example, as shown in FIG.
As shown in FIG. 3, three acceleration tubes 152A and each acceleration tube 15A
A drift space 152B located between 2A and a magnet 152 which is arranged in each drift space 152B and deflects an electron beam in each drift space 152B.
C, each of these members is arranged in an arc shape, and the magnet 152C irradiates the electron beam with the electron beam irradiation head unit 15.
It is designed to stably guide to No. 4. In addition, 152D
Is an electron gun. In the case of this arm 152, even a long accelerating tube necessary for obtaining a high energy beam can be manufactured.

Conventionally, in order to mount the acceleration tube 152A on the arcuate arm 152, it was necessary to shorten the tube length as shown in FIG. 4B, but as described above, the acceleration tube is divided into a plurality of sections. However, by providing the drift space 152B between them, the arm 152 of this embodiment can be manufactured.

Therefore, when a large dose of radiation is applied to the affected area I, the driving force of the motor 158 is transmitted to the arm 152 via the rail 157 in order to reduce the dose on normal tissue as much as possible. Centered around the arm 15
2 is moved to change the position of the radiation generation unit 154, and the radiation X ₁ , X ₂ , X is moved from each position as shown in FIG.
₃ and irradiate the arm 152 with the rotation bearing 154 as an axis at each position as shown in FIG.
By irradiating the affected area I with radiation around the affected area I as a center, the affected area I as a whole can be three-dimensionally irradiated without moving the treatment table 153, and accurate treatment can be easily performed.

As described above, according to the present embodiment, the radiation is accurately aligned with the affected area I only by rotating the radiation generator 154, that is, the arm 152, without complicatedly driving the treatment table 153. The radiation can be concentrated on the affected area I while avoiding the important organs and normal tissues, and a large dose can be applied to perform accurate treatment.

Example 3. The radiation therapy apparatus of this embodiment is
As shown in FIG. 6, in the same manner as in Example 2 except that a radiation generation unit 154A and a collimator 155A similar to the radiation generation unit 154 having a radiation generation source in place of the radiation detector in Example 2 were provided. It is configured. Therefore, according to the present embodiment, the irradiation time of radiation can be shortened to half.

Example 4. The radiation therapy apparatus of this embodiment is
As shown in FIG. 7, an arcuate rail 151B disposed on the ceiling 151A and an attachment portion 158A movably attached to the rail 151B are provided.
Example 3 except that the arm 152 is attached to 8A
Is configured similarly to. Further, the center of the rail 151B is located at the intersection with the vertical line from the isocenter I. Therefore, also in this embodiment, it is possible to obtain the same effects as those of the third embodiment.

Example 5. The radiation therapy apparatus of this embodiment is
As shown in FIG. 8, the device body 161 and the device body 1
61 includes a housing 162 rotatably disposed with respect to 61, a radiation generation unit 164 that radiates radiation to the housing 162, and a collimator that limits a radiation irradiation field from the radiation generation unit 164. (Not shown), while irradiating the affected part I of the patient on the treatment table 163 with radiation while rotating the casing 162 with the rotation bearing 166,
The apparatus main body 161 is adapted to move in an arc shape in the direction of the arrow in the figure. As shown in FIG. 9, in the present embodiment, the rail 16 as a path formed in an arc shape with the isocenter I as the center so that the apparatus main body 161 moves.
7 is provided, and the device main body 161 runs along the rail 167.

Therefore, in the case of irradiating the affected area I with a large dose of radiation, the apparatus main body 161 is mounted on the rail 1 around the affected area I in order to reduce the dose that hits the normal tissue as much as possible.
The irradiation position from the radiation source 164 is changed as shown in FIG. 10 by traveling along the line 67 to irradiate the radiation X from each position, and the rotation bearing 16 at each position.
By rotating the housing 162 around the affected area I with 6 as an axis and intensively irradiating radiation, the affected area I is three-dimensionally irradiated as a whole without moving the treatment table 163, and accurate treatment is simplified. Can be done.

As described above, according to this embodiment, the radiation source 164 of the irradiation head, that is, the housing 162 is simply driven to rotate without complicatedly driving the treatment table 163, and the radiation is accurately affected. It is possible to perform accurate treatment by aligning with I and irradiating a large dose of radiation to the affected area I while avoiding important organs and normal tissues.

Further, as shown in FIG.
61 is provided on, for example, a fan-shaped drive plate 168.
Even in the radiotherapy apparatus configured by rotating 68, the same operational effect can be obtained as in the above embodiment.

Example 6. The radiation therapy apparatus of this embodiment is
As shown in FIG. 12, the apparatus main body 171 and the rotating body 172 rotatably arranged with respect to the apparatus main body 171 are provided, and the rotating body 172 rotates around the treatment table 173 around the y axis. While the patient's head is affected (eye center) I
The collimator 175 is configured to irradiate the radiation with the radiation field limited. Also, the rotating body 1
72 is formed in an arc shape with the affected part I as the center point. A radiation source 176, which is an irradiation unit, is distributed and arranged at four locations on the rotating body 172 so that the radiation is concentrated on the affected area I. In the figure, 177 is a shield that shields radiation, 178 is a detector, and 179 is a fixture that fixes the patient's head.

Next, the operation will be described. When radiation is emitted from each radiation source 176, each radiation is concentrated and applied to the affected area I. By rotating the rotating body 172 by 360 ° in this state, the dose is three-dimensionally concentrated on the affected area I. And during this rotation,
Radiation is concentrated on the affected area I in a state where one plane and three different conical shapes are formed by the four radiation sources 176, and the dose can be dispersed on the body surface of the patient.
Moreover, since there are four radiation sources 176, it is possible to irradiate the radiation in a short time. For example, in order to give a dose of 60 Gy, it is possible to complete the irradiation time of about 2 minutes. In addition, treatment can be performed without moving the patient while irradiating with radiation. Further, the irradiation dose and the diameter of the collimator 175 can be appropriately adjusted or selected so that the distribution of the absorbed dose becomes closer to the affected area I.

Further, the shield 177 can shield the radiation transmitted through the patient, and can easily shield the building in which the present apparatus is installed. This shield 17
7 can be attached to other than the rotating body 172, and in that case, the size of the shielding body 177 can be minimized by driving the shielding body 177 in synchronization with the rotation of the rotating body 172. .

Example 7. The radiation therapy apparatus of this embodiment is
As shown in FIG. 13, a preamplifier 180 that includes a rotating body 172 configured similarly to the sixth embodiment, further amplifies the detection signal from the detector 178, and an image processing unit that performs image processing on the signal from the preamplifier 180. 181 is provided. The processing signals of the imaging X-ray tube 180 and the image processing unit 181 are the image display device 1.
The X-ray fluoroscopic image 182A and the CT cross-sectional image 182B are displayed at 82, respectively. Further, in order to increase the resolution of the image, an X-ray tube 183 for image pickup having a lower energy than X-rays such as 4 MV and 150 KV may be separately provided. In this case, the detector 178 corresponding to the X-ray tube 183 is arranged symmetrically with respect to the y axis.

Next, the operation will be described. The detector 1
The detection signal at 78 is amplified by the preamplifier 180, subjected to image processing by the image processing unit 181, and displayed on the image display device 182. With this image, the position of the affected area I can be confirmed or aligned. Further, if the detector 178 is configured as a two-dimensional detector, a fluoroscopic image can be obtained as shown in FIG. 21, and the affected part I is imaged while the rotating body 172 is rotated and image processing is performed, so that a CT image can be obtained. A cross-sectional image 182B can be obtained. Further, in order to perform accurate and highly accurate alignment of the affected part I, the treatment table 173 is moved in the direction along the y-axis to take several CT cross-sectional images, and also X-ray fluoroscopic images are taken. Thus, the affected part I can be three-dimensionally aligned.

Example 8. In the radiotherapy apparatus of the present invention,
As shown in FIG. 14, the apparatus main body 200 is provided with a motor 201 for moving the moving body 202.
The moving body 202 is moved along the rail 203 by the driving. Bearing 2 for moving body 202
An arm 205, which is a rotating body, is provided via 04, and the arm 205 has 360 ° around the bearing 204.
It is designed to rotate. At the tip of the arm 205, the radiation generator 206 and the collimator 20 which are irradiation units are provided.
7 is provided. With respect to the movement of the moving body 202, the affected part 208 is located on the central axis A of the bearing 204, and the central axis A, the radiation generation part 206, and the affected part 20.
The radial center axis B connecting 8 and 8 is always orthogonal to each other.

In the case of the second embodiment shown in FIG. 3, the affected area can be three-dimensionally irradiated, and the arm 152 is moved stepwise along the rail 157 to make the bearing 15
6 is rotated about the central axis of FIG.
As shown in (a) and (b), radiation irradiation trajectories with different turning radii are drawn, and the arm 152 is connected to the rail 15
When the bearing 156 is rotated about the central axis of the bearing 156 while being continuously moved along 7, a spiral radiation orbit is drawn. The rotation angular velocity of the arm 152 is constant, and the irradiation radius per unit length is increased in (3) in FIG. 15 (a) where the rotation radius is small, as compared with (1),
Radiation is radiated to a portion of the normal area. On the other hand, in the case of this embodiment, when the movable body 202 is moved to change the irradiation angle of the radiation to the affected part 208 and the arm 205 is rotated around the affected part 208,
The central axis A of the bearing 204 and the radial central axis B are always orthogonal to each other, and the radius of gyration does not change, as shown in FIG.
As shown in (b), the affected area 208 is irradiated with radiation.

Example 9. FIG. 17 is an example different from the eighth embodiment in that the rail 210 is provided on the apparatus main body 211. FIG. 18 shows a radiotherapy apparatus using the arm 152 of the second embodiment shown in FIG. 3 instead of the arm 205 of FIG. Further, FIG. 19 shows the arm 205 shown in FIG.
4 is an apparatus using the arm 152 of FIG.

[0047]

As described above, according to the invention described in claim 1 of the present invention, while the treatment table is fixed, the irradiation unit follows the arcuate path in the direction intersecting the rotation direction. Since it reciprocates, it is possible to provide a radiotherapy device that can disperse the irradiation dose to normal tissue and suppress the exposure dose to normal tissue.

According to the second aspect of the present invention, the rotating body reciprocates in the direction intersecting with the rotating direction of the irradiation unit at the connecting portion with the apparatus body while the treatment table is fixed. Therefore, without complicatedly driving the treatment table, it is possible to perform accurate treatment by accurately aligning radiation to the irradiation unit and irradiating the affected region in a concentrated manner simply by driving the irradiation unit without complicated driving. Can be provided.

Further, according to the third aspect of the present invention, since the apparatus main body is moved in an arc shape with the affected part as the center while the treatment table is fixed, the treatment table is complicated. It is possible to provide a radiation treatment apparatus capable of accurately aligning radiation to the irradiation unit and irradiating the affected part in a concentrated manner by performing irradiation of the irradiation unit only by driving the irradiation unit without driving.

According to the fourth aspect of the present invention, since the radiation is concentrated on the affected area from a plurality of positions of the rotating body, the irradiation unit is driven without complicatedly driving the treatment table. Thus, it is possible to provide a radiation treatment apparatus capable of accurately aligning radiation to the irradiation portion and irradiating the affected portion in a concentrated manner to perform accurate treatment.

According to the invention of claim 5 of the present invention, when the movable body is moved to change the irradiation angle of radiation to the affected part and the arm is rotated about the affected part,
The center axis of the bearing and the center axis of radiation are always orthogonal to each other, the radius of gyration does not change, and when the affected area is irradiated with radiation three-dimensionally, the normal area is uniformly irradiated without being biased. Thus, it is possible to provide a radiotherapy device capable of suppressing the destruction of normal tissue to a minimum.

[Brief description of drawings]

FIG. 1 is a side view showing still another embodiment of the radiotherapy apparatus of the present invention.

FIG. 2 is a side view for explaining the operation of the radiotherapy apparatus shown in FIG.

FIG. 3 is a side view showing still another embodiment of the radiotherapy apparatus of the present invention.

4A and 4B are diagrams showing a configuration of an arm of the radiotherapy apparatus shown in FIG. 3, in which FIG. 4A is a side view thereof, and FIG. 4B is a side view showing a main part of the configuration of another arm. .

5A and 5B are diagrams showing a state of irradiating an affected area with the radiotherapy apparatus shown in FIG. 3, where FIG. 5A is a side view thereof and FIG.
Is a front view thereof.

FIG. 6 is a side view showing still another embodiment of the radiotherapy apparatus of the present invention.

7A and 7B are views showing still another embodiment of the radiotherapy apparatus of the present invention, FIG. 7A is a side view thereof, and FIG. 7B is a plan view from below.

FIG. 8 is a plan view showing still another embodiment of the radiotherapy apparatus of the present invention.

9 is a plan view showing a specific example of the radiation therapy apparatus shown in FIG.

10 is a plan view showing a state in which the affected area is irradiated by the radiotherapy apparatus shown in FIG.

FIG. 11 is a plan view showing still another embodiment of the radiotherapy apparatus of the present invention.

FIG. 12 is a plan view showing still another embodiment of the radiotherapy apparatus of the present invention.

13 is a plan view showing the overall configuration of the radiotherapy apparatus shown in FIG.

FIG. 14 is a side view showing still another embodiment of the present invention.

15 (a) is a view of the trajectory of irradiation of radiation based on the operation of the radiation treatment apparatus shown in FIG. 3 as seen from the center axis of the bearing, and FIG. 15 (b) is a side view of the radiation treatment apparatus. It is the figure seen from.

16 (a) is a diagram showing a state in which radiation is emitted based on rotation of an arm of the radiotherapy apparatus shown in FIG. 14, as seen from the center axis of the bearing, and FIG. 16 (b) is a diagram showing movement of a moving body. FIG. 6 is a view of a state in which radiation is emitted based on the above, as viewed from the center axis of the bearing.

FIG. 17 is a side view showing still another embodiment of the present invention.

FIG. 18 is a side view showing another embodiment of the present invention.

FIG. 19 is a side view showing still another embodiment of the present invention.

FIG. 20 is a side view showing another example of the conventional radiotherapy apparatus.

FIG. 21 is a plan view showing a collimator of the radiotherapy apparatus shown in FIG.

22 is an explanatory diagram showing a range of an affected part to which radiation is applied based on the operation of the radiation therapy apparatus shown in FIG.

FIG. 23 is a side view showing another example of the conventional radiotherapy apparatus.

FIG. 24 is a diagram showing another example of a conventional radiotherapy apparatus, FIG. 24 (a) is a side view thereof, and FIG. 24 (b) is a front view thereof.

25A and 25B are diagrams showing a state in which the affected area is irradiated by the radiotherapy apparatus shown in FIG. 24, FIG. 25A is a plan view thereof, and FIG. 25B is a side view thereof.

26 is a diagram showing a state of irradiating an affected area with the radiotherapy apparatus shown in FIG. 24, FIG. 26 (a) is a side view thereof, and FIG. 26 (b) is a lateral cross-sectional view thereof.

27 is a plan view showing a state in which the treatment table of the radiation treatment apparatus shown in FIG. 24 is driven.

28 is a plan view showing a state in which the treatment table of the radiation treatment apparatus shown in FIG. 24 is driven to treat the affected area with radiation.

29 is a plan view showing a state in which the treatment table of the radiation treatment apparatus shown in FIG. 24 is driven to avoid an important organ and irradiate the affected area of the patient with radiation.

FIG. 30 is a side view showing still another example of the conventional radiotherapy apparatus.

FIG. 31 is a side view showing still another example of the conventional radiotherapy apparatus.

[Explanation of symbols]

133 treatment table, 134 X-ray generator (irradiation unit), 1
35 First-stage collimator, 136 Y collimator, 138
X collimator, 144 irradiation head section (irradiation section), 1
45 drive unit (rotating body), 145A arc-shaped path, 1
52 arms (arc-shaped rotating body), 157 rails (arc-shaped path), 167 rails (arc-shaped path), I
Isocenter or affected area, 200 Device body, 202
Moving body, 204 bearing, 205 arm (rotating body), 206 radiation generating section, 208 affected section, 211
The device body.

Continued front page    (72) Inventor Masaaki Kurokawa             3-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Prefecture             Ryo Electric Co., Ltd. (72) Inventor Kazuyuki Hanakawa             3-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Prefecture             Ryo Electric Co., Ltd. (72) Inventor Funata Sansei             3-1-1 Tsukaguchihonmachi, Amagasaki City, Hyogo Prefecture             Ryo Electric Co., Ltd. F-term (reference) 4C082 AA01 AC02 AE03 AG22 AG54

Claims (5)

[Claims] 1. A rotating body rotatably connected to a main body of the apparatus, and an irradiation unit housed in the rotating body, and while rotating the rotating body, irradiates radiation from the irradiation unit to treat an affected area. In the radiotherapy apparatus, the arc-shaped path is formed in the rotating body in a direction intersecting with the rotation direction of the irradiation section, and the irradiation section is configured to be reciprocable along the path. Radiation therapy device. 2. A rotator rotatably connected to the apparatus main body, and an irradiation unit housed in the rotator, and the irradiation unit irradiates radiation while treating the affected part while rotating the rotator. In the radiotherapy device, the rotating body has an arc shape and has the irradiating portion at its end, and the rotating body reciprocates in a direction intersecting the rotating direction of the irradiating portion at a connecting portion with the apparatus body. A radiotherapy device characterized by being configured to be movable. 3. A rotating body rotatably connected to a main body of the apparatus, and an irradiation unit housed in the rotating body. Radiation is emitted from the irradiation unit while rotating the rotating body to treat an affected area. In the radiation treatment apparatus described above, the apparatus body is configured to be movable in an arc shape around the affected part. 4. A rotating body rotatably connected to a main body of the apparatus, and an irradiation unit housed in the rotating body. Radiation is emitted from the irradiation unit while rotating the rotating body to treat an affected area. In the radiotherapy device, the rotating body is formed in an arc shape with the affected part as a center point, and the irradiation parts are arranged in a distributed manner so that radiation is concentrated on the rotating body in the affected part. Radiation therapy device. 5. An apparatus main body, a moving body that can move in an arc with respect to the apparatus main body, a rotating body that is provided in the moving body via a bearing and is rotatable about the bearing, and a rotating body inside the rotating body. With a stored irradiation unit, the affected area is located on the central axis of the bearing with respect to the movement of the moving body, and the central axis and the line connecting the irradiation unit and the affected area are always orthogonal to each other. The radiation treatment apparatus is characterized in that the irradiation part is irradiated with radiation while rotating the rotating body around the affected part to treat the affected part.