JP2578535B2 - Radiotherapy equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention prevents a collimator forming a radiation field corresponding to the shape of an affected part of a patient from colliding with the patient during radiation treatment, and an irradiation head for irradiating the patient with radiation. The present invention relates to a radiotherapy device that can prevent collision with a technician or the like.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing a configuration of a conventional radiotherapy apparatus. In FIG. 4, reference numeral 1 denotes an electron generator for generating an electron beam, and 2 denotes an electron generator which is coupled to the electron generator 1. An electron accelerator 3 for accelerating the beam is coupled to the electron accelerator 2, and a high-frequency electric field generator for generating a microwave and supplying the electron to the electron accelerator 2 is disposed adjacent to the electron accelerator 2. A deflection electromagnet 5 which deflects the laser beam in a direction orthogonal to a treatment table to be described later. Is a collimator arranged adjacent to the target 5 for irradiating a patient (not shown) with X-rays by limiting an irradiation field of scattered X-rays;
Reference numeral 7 denotes a treatment table arranged to face the collimator 6 for fixing the patient and irradiating the affected part with X-rays from the collimator 6, and 8 is connected to the electron beam generator 1 and the high-frequency electric field generator 3. And 9 is connected to the collimator 6, the treatment table 7 and the power supply 8, and X
This is an operation device that performs overall control such as setting of a line and rotation of the treatment table 7.

Next, the operation will be described. Electron generator 1
Is sent to the electron accelerator 2, and the electron accelerator 2 receives the microwave generated by the high-frequency electric field generator 3, thereby accelerating the electron beam. The electron beam accelerated to almost the speed of light by the electron acceleration unit 2
Thus, the light is deflected in a direction perpendicular to the treatment table 7 and is incident on the target 5. As a result, X-rays are generated and scattered from the target 5, and the scattered X-rays are irradiated on the affected part of the patient fixed on the treatment table 7 with the irradiation field limited by the collimator 6.

[0004] When performing treatment using a radiation therapy apparatus, it is necessary to obtain the position of the affected part in the patient in advance using an X-ray CT, a treatment planning apparatus, or the like. FIG. 5 is an explanatory view showing such an X-ray treatment situation, and FIG. 6 is an explanatory view showing a treatment situation at a certain rotational position of an irradiation head unit described later. In FIGS. 5 and 6, 1
Reference numerals 1 and 12 denote a fixed gantry and a rotary gantry, respectively, of the radiation therapy apparatus, and 13 denotes an irradiation head mounted on the gantry 12. 6 is included. Reference numeral 14 denotes an irradiation head unit rotation drive unit which is located between the fixed base 11 and the rotary base 12 and drives the irradiation head unit 13 to rotate. ) Is activated, 16 is a patient lying on the treatment table 7, 17 is the affected part of the patient 16, 18 is the irradiation head 1
A setter, such as a technician or a physician, who sets 3 in the affected area 17 of the patient 16, and 19, when operated by the setter, rotationally drives the rotating base 12 and thus the irradiation head 13 via the irradiation head rotation driving unit 14. It is a handheld device. In such a configuration, the irradiation head unit 13 can rotate 270 ° left and right around the patient 16 regardless of the position of the affected area 17 on the patient 16, and thus can emit X-rays from any angle. . When the irradiation head unit 13 is set at the position of the affected part 17 determined in advance, the irradiation head unit 13 may collide with the patient 16, and if it does, the limit switch 15 operates and the interlock ( (Not shown) to stop the subsequent X-ray irradiation. As described above, in the conventional radiotherapy apparatus, if the irradiation head unit 13 collides with the patient 16, the driving thereof is stopped, and the X-ray irradiation is also stopped. However, since the irradiation head unit 13 stops at the collision position, there is a risk that the patient 16 may be harmed in this state. Further, in addition to the collision of the irradiation head unit 13 with the patient 16, there is a possibility that the irradiation head unit 13 collides with a setter 18 who sets the irradiation head unit 13.

[0005]

Since the conventional radiation therapy apparatus is configured as described above, when setting the irradiation head to the affected part, if the irradiation head collides with the patient,
Since the rotation movement of the irradiation head unit is stopped and the X-ray irradiation is stopped, there is a problem that the patient may be harmed in some way. Further, there is a problem that a setting person who sets the irradiation head unit may collide with the irradiation head unit.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and prevents the irradiation head from colliding with a patient and a setter himself or a person other than the setter.
An object of the present invention is to provide a radiotherapy apparatus capable of stopping X-ray irradiation even in the event of a collision.

[0007]

A radiotherapy apparatus according to the present invention is mounted on a collimator, and senses the temperature of the patient when the collimator is set at an affected part of a patient to prevent the collimator from colliding with the patient. A temperature sensor for a collimator, and attached to the collimator,
A limit switch is provided for stopping treatment setting when radiation of the temperature sensor is broken and collision of the collimator with the patient, and disabling radiation irradiation.

Further, the radiation therapy apparatus according to the present invention is attached to an irradiation head, and senses the temperature of a person other than a predetermined person or a setter of the collimator when setting the collimator to an affected part of a patient. An irradiation head temperature sensor is provided for preventing the head from colliding with the setter or a person other than the setter.

[0009]

In the present invention, the collision between the patient and the collimator is prevented by the temperature sensor for the collimator. Further, the collision between the setter and the irradiation head unit is prevented by the irradiation head temperature sensor.

[0010]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment of the radiotherapy apparatus according to the present invention.
In the figures, 6, 9, 14 and 19 are the same as the conventional example described with reference to FIGS. 4 to 6, and 21 is attached to the collimator 6 and sets the collimator 6 to the patient's diseased part 17. This is a collimator temperature sensor for detecting the temperature of the patient 16 and preventing the collimator 6 from colliding with the patient 16.

Next, the operation will be described. The setter of the radiation therapy apparatus activates the irradiation head unit rotation drive unit 14 with the hand-held operation device 19, whereby the irradiation head unit 13 is rotated and the collimator 6 is set to the affected area 17 of the patient 16. At this time, the collision between the collimator 6 and the patient 16 is prevented by the collimator temperature sensor 21 attached to the collimator 6. The collimator temperature sensing sensor 21 is damaged and the collimator 6
When the patient and the patient 16 collide, the limit switch 15 operates as in the conventional example. That is, the temperature sensing sensor 21
Then, a signal from the limit switch 15 is input to the operating device 9, and an interlock for preventing treatment setting and X-ray irradiation is activated. The resetting of the device is performed by the resetter 18 resetting the hand-held operation device 19.

Embodiment 2 FIG. FIG. 2 is a block diagram showing a second embodiment of the present invention, in which 9, 14, and 19 are the same as those shown in FIG.
3 and the collimator 6 is attached to the affected part 17 of the patient.
A temperature sensor for the irradiation head unit for detecting the temperature of the setter 18 or a person other than the setter to prevent the collision between the irradiation head unit 13 and the setter 18 or a person other than the setter. is there.

The operation of the second embodiment configured as described above is as follows. The setting person 18 drives the irradiation head unit rotation drive unit 14 by the hand-held operation device 19 and the irradiation head unit 13
Is rotated to set the collimator 6 at the affected part 17 of the patient. During this setting, the irradiation head temperature sensor 22 attached to the side of the irradiation head senses the temperature of the setter 18 or a person other than the setter to prevent collision with the irradiation head 13. That is, by inputting a detection output signal from the irradiation head unit temperature sensing sensor 22 to the operating device 9, an interlock that disables treatment setting and X-ray irradiation operates. The resetting is performed by a reset operation of the hand-held operation device 19.

[0014]

As described above, according to the present invention, the collimator is provided with a temperature sensor and a limit switch for the collimator, and is provided with a temperature sensor for the irradiation head on the side surface of the irradiation head, thereby setting erroneously. Also at this time, there is an effect that it is possible to prevent the collision of the irradiation head unit with the patient, the setter or a person other than the setter, and to prevent erroneous X-ray irradiation.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a radiotherapy apparatus according to the present invention.

FIG. 2 is a block diagram showing another embodiment of the present invention.

FIG. 3 shows an X-ray treatment situation in the present invention,
FIG. 4 is an explanatory diagram showing a positional relationship between a temperature sensor for a collimator of an irradiation head unit and a limit switch.

FIG. 4 is a block diagram illustrating a configuration of a conventional radiation therapy apparatus.

FIG. 5 is an explanatory diagram showing a conventional radiation treatment situation.

FIG. 6 is an explanatory diagram showing a conventional radiotherapy situation and showing a position of a limit switch attached to an irradiation head unit.

[Explanation of symbols]

 6 Collimator 13 Irradiation head 15 Limit switch 16 Patient 17 Affected part 21 Temperature sensor for collimator 22 Temperature sensor for irradiation head

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-129572 (JP, A) JP-A-2-88081 (JP, A) JP-A-64-27568 (JP, A) JP-A-62-1987 204769 (JP, A) JP-A-61-20564 (JP, A) JP-A-64-54565 (JP, U) JP-A-58-185234 (JP, U) JP-A-55-87247 (JP, U) Japanese Utility Model Showa 55-40857 (JP, U) Japanese Utility Model Showa 55-40815 (JP, U)

Claims (2)

(57) [Claims] 1. A radiation therapy apparatus for treating an affected part of a patient by irradiating the affected part with a radiation from an irradiation head unit including a collimator for limiting an irradiation field of the generated radiation. A collimator temperature sensor for sensing the temperature of the patient when set to prevent the collimator from colliding with the patient, and attached to the collimator, when the collimator temperature sensor is damaged And a limit switch for stopping treatment setting when the collimator collides with the patient and disabling radiation irradiation. 2. A radiation therapy apparatus for irradiating the affected part of a patient with the radiation from a radiation head including a collimator for limiting an irradiation field of the generated radiation, and treating the affected part of the patient, wherein the collimator is attached to the radiation head. An irradiation head for sensing the temperature of a person other than the setter of the collimator or a person other than the setter to prevent the irradiation head from colliding with the setter or a person other than the setter when setting the patient's affected part. A radiotherapy device comprising a temperature sensor for external use.