JPS6320536B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a radiotherapy apparatus capable of performing X-ray diagnosis and radiotherapy.

Conventionally, when performing radiotherapy, the patient is first diagnosed and treated using an X-ray diagnostic device in order to examine the shape, location, and other specifications of the lesion, and the necessary data are obtained. Based on the above data, a radiation therapy device is used to emit radiation to perform treatment.

FIG. 1 is a block diagram showing an example of an X-ray diagnostic apparatus, in which X-rays are emitted from an X-ray generator 1 to a subject 2, and the transmitted X-rays are detected by an X-ray detector 3. Then, while the X-ray generating section 1 and the X-ray detecting section 3 are facing each other, they are rotated around the subject 2 by the rotation mechanism section 4 to obtain transmitted X-ray data in all directions and analyze this data. I try to make a diagnosis by doing this.

On the other hand, FIG. 2 is a block diagram showing an example of a radiation therapy apparatus, in which electrons generated in an electron generating section 5 are transferred to an accelerating section 6.
Furthermore, the microwave generated by the microwave generator 7 is applied to the acceleration unit 6 to obtain a microwave electric field to accelerate the electrons. The accelerated electrons are then deflected in a desired direction by the deflection section 8, the electron beam is converted into X-rays, and the irradiation field corresponding to the lesion of the irradiated subject is obtained by the conformal aperture section 9. I try to radiate it. Furthermore, the electron generating section 5, the accelerating section 6, the deflecting section 8, and the conformal aperture section 9 are integrally driven to rotate around the subject by the rotation mechanism section 10, and radiation can be irradiated from all angles to perform treatment. I try to do that. Further, the rotation angle of the rotation mechanism section 10 is detected by the angle detection section 11, and this detection output is given to the original object aperture control section 12. Original aperture control section 12
is the conformal aperture section 9 according to the rotation angle based on the detection output and the data regarding the lesion given in advance.
The radiation dose is controlled and irradiated only to the lesion, minimizing the exposure dose to normal tissues.

However, when performing radiation therapy based on the diagnostic results of an X-ray diagnostic device, the above-mentioned X-ray diagnostic device and radiation therapy device are required, and a diagnostic room and treatment room must be provided, which requires a large amount of space and is expensive. . Furthermore, in order to input the data obtained by the X-ray diagnostic apparatus into the radiotherapy apparatus, various calibrations must be performed, which poses a problem that is troublesome and takes a long time.

The present invention has been made in view of the above circumstances.1
Diagnosis and treatment can be performed using a single device, and the irradiation field for treatment can be automatically set according to the diagnosis results.The overall price is low, the operation is easy, and the installation space is small. It is an object of the present invention to provide a radiotherapy apparatus that can perform reliable radiotherapy with a small amount of radiation.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the block diagram shown in FIG. 3, in which the same parts as in FIGS. 1 and 2 are given the same reference numerals. First, during X-ray diagnosis, it is determined whether X-ray irradiation is continuous or intermittent, and the setting is made in the rotating mechanism section 10. For example, in the case of intermittent radiography, X-ray exposure is performed at 10-degree intervals and 30-degree intervals. When the rotation mechanism unit 10 sets the X-ray irradiation angle at intervals of 10 degrees, a setting signal is sent to the storage unit 12 via the acceleration unit 6 and the angle detection unit 11 for each rotation angle of 10 degrees.
For example, if the rotation start angle is 0 degrees, the acceleration unit 6 is ready for operation every 10 degrees of rotation, and the storage unit 12 detects the rotation angle. On the other hand, the electron beam generated by the electron generating section 5 and the microwave generated by the microwave generating section 7 are applied to the accelerating section 6, and the accelerating section 6 operates to accelerate the electron beam by the electric field of the microwave. This accelerated electron beam is deflected at a predetermined angle by a deflection section 8 and converted into radiation, for example, X-rays, and is
The irradiation field is narrowed down to a predetermined irradiation field, and the subject 2, that is, the subject to be irradiated, is irradiated. The X-rays that have passed through the subject 2 are converted into electrical signals according to the amount of X-rays by an X-ray detector 3 such as a photomultiplier or an ion chamber. Then, this electric signal is given to the analysis mechanism unit 13 to perform data analysis, determine the shape and position of the lesion of the subject 2, and set the open/close position of the aperture blades by the target aperture setting unit 14, and use this setting data as the original. The aforementioned set rotation angle is stored in the storage section 16 via the body aperture setting section 14 and the gate section 15 that opens during diagnostic operation and closes during treatment operation, for example, in units of 10 degrees. FIG. 4 is a block diagram showing an example of the analysis mechanism section 13.
The detection signal of the radiation detection section 3 is given to the analysis conversion section 131 of the analysis mechanism section 13 for data analysis, and the analyzed data is given as a video signal to the monitor section 132 to display and record an X-ray fluoroscopic image of the lesion. Part 1
Recorded on 33. Further, the opening degree of the conformal aperture setting section 14 for setting the opening/closing position of the aperture of the conformal aperture section 9 is displayed on the monitor section 132 superimposed on the X-ray fluoroscopic image of the lesion, and the gate Part 1
5 to the storage section 16. FIG. 5 is a diagram showing an example of an image displayed on the monitor unit 132, in which A is an image of a lesion to be treated with radiation, and B is an image of a lesion to be treated with radiation.
is an image showing the setting position of the aperture blades set in the conformal aperture setting unit 14 so as to obtain radiation of a desired irradiation field. The opening degree of the aperture blades of the original aperture setting section 14 is set by an operator while looking at the image on the monitor section 132 to prevent erroneous irradiation due to misdiagnosis. Note that the opening degree of the aperture blades may be set automatically by pattern recognition using, for example, an arithmetic processing unit.

On the other hand, the angle detection unit 1 detects the rotation angle of the rotation mechanism unit 10.
1, and this detection output is given to the storage section 16 and stored simultaneously with the setting data of the primary aperture setting section 14. That is, the storage unit 16 stores the rotation angle unit, for example, 10
The opening/closing angle of the original aperture 9 for each angle in degrees is stored.

Then, reference numeral 17 sets each operation for diagnosis and treatment, that is, the X-ray intensity at the time of diagnosis, the radiation intensity at the time of treatment, and the variable filter selection signal using the operation unit 17, and stores them in the storage unit 16. Therefore, in response to the diagnosis operation from the operation section 17, the microwave power of the microwave generation section 7 is controlled via the microwave control section 18 based on the data read out from the storage section 16, and the data is read out from the storage section 16. We try to obtain suitable relatively weak X-rays.

When performing radiation therapy next, first gate section 1
5 and execute the switch from diagnosis to treatment. Next, the set angle of the rotation mechanism unit 10 is detected by the angle detection unit 11, and if it matches the set angle of X-ray exposure in the case of the above-mentioned diagnosis, the storage unit
Give a signal to 6. Here, the storage unit 16 provides the original aperture control unit 12 with the set position of the aperture blades according to the set angle. The mass aperture control section 12 controls the mass aperture section 9 according to the signal given from the storage section 16.
is controlled to set an appropriate irradiation field according to the lesion of the irradiated subject 2. Further, a signal from the storage section 16 is given to the microwave control section 18 to control the microwave power of the microwave generation section 7, so as to obtain relatively strong radiation suitable for treatment.

Furthermore, in the case where the lesion of the radiation subject 2 is treated by continuously irradiating radiation from all angles, X-ray diagnosis may be similarly performed from all angles and the data may be stored in the storage unit 16.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, as shown in the block diagram of FIG. The variable filter section 19 may be controlled via the variable filter control section 20 in accordance with the data stored in the section 16.

As described in detail above, the present invention enables X-ray diagnosis and radiotherapy to be performed with a single device, and also stores the data at the time of X-ray diagnosis, reads out the stored contents, and performs the irradiation field at the time of radiotherapy. It is designed to control. Therefore, there is no need for a positioning device and a treatment device as in the past, and the irradiation range for treatment can be reliably matched with the irradiation range for diagnosis, allowing the irradiation range to be adjusted as required. While keeping it to a minimum,
It is possible to provide a radiation therapy device that is inexpensive, requires a small installation space, and can simply and easily perform accurate radiation therapy.

[Brief explanation of the drawing]

1 and 2 are block diagrams showing examples of conventional X-ray diagnostic equipment and radiotherapy equipment, FIG. 3 is a block diagram showing an embodiment of the present invention, and FIG. 4 is an analysis mechanism of the above embodiment. A block diagram showing an example of the part,
FIG. 5 is a diagram showing an example of a monitor image of the above embodiment;
FIG. 6 is a block diagram showing another embodiment of the present invention. 2... Subject (exposed subject), 3... X-ray detection unit,
5...Electron generation section, 6...Acceleration section, 7...Microwave generation section, 8...Deflection section, 9...Product constriction section,
10...Rotation mechanism section, 11...Angle detection section, 12
...Product aperture control section, 13...Analysis mechanism section, 14
...Content aperture setting section, 16...Storage section, 17...
Operation unit, 18...Microwave control unit, 19...Variable filter unit, 20...Variable filter control unit.

Claims (1)

[Claims] 1 After accelerating the electron beam by a microwave electric field and deflecting it in a predetermined direction, the electron beam is converted into radiation, and during diagnosis, the radiation is irradiated onto the subject, and the transmitted radiation is detected and analyzed by the radiation detection unit. In an apparatus that obtains diagnostic information about a subject and, during treatment, narrows the radiation to a predetermined irradiation field using a conformal aperture unit and irradiates the subject, the radiation that has passed through the subject during diagnosis is used to perform radiotherapy on the subject. a radiation detector that detects the radiation and outputs an electrical signal according to the radiation dose;
an analysis conversion unit that receives the electrical signal output from the radiation detector and analyzes the output to create a radiation transmission image signal of the subject; and an analysis conversion unit that receives the radiation transmission image signal obtained by the analysis conversion unit. a monitor section that displays a radiographic image of the subject, and a conformal aperture of the conformal aperture section, and displays the setting state of the conformal aperture on the monitor section superimposed on the radiographic image. a storage unit that stores setting signals of the standard aperture setting unit; and a storage unit that reads out the setting signals stored in the storage unit during treatment and controls the settings of the standard aperture based on the setting signals. A radiation therapy apparatus comprising: a conformal aperture control section that applies a signal to the conformal aperture section.