JP2002355321A - Radiotherapy planning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiotherapy planning apparatus capable of obtaining more suitable dose distribution. SOLUTION: This radiotherapy planning apparatus 2 comprises functions of capturing an electron data of a DR image imaged at a patient's affected part from an X-ray simulator 1a on line to the apparatus 2, setting a profile shape and an irradiating field shape of the affected part, also capturing electron data of a CT image imaged at a patient's body section imaged by an X-ray CT 1b, calculating a radiation dose under combination of the electron data of the DR image with that of the CT image, and obtaining the dose distribution.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a radiation treatment planning apparatus used for calculating a radiation dose required for radiation treatment.

[0002]

2. Description of the Related Art An X-ray simulator image processing apparatus according to the prior art is disclosed in Japanese Patent Application Laid-Open No. Hei 5-15526. According to this document, an analog video signal of an image obtained by imaging an affected part of a patient using an X-ray simulator device is converted into an analog video signal.
D-convert, capture the contour shape of the affected part as a digital signal, adjust the X-ray shielding material shape according to the contour shape,
A technique for setting an optimum irradiation field is disclosed.

[0003] Japanese Patent Application Laid-Open No. 6-54916 discloses that
A respiratory monitor treatment method is shown, in which a television camera is used to image the body surface of an affected part of a patient in an exhaled state and an inspired state, and the amount of radiation applied to the affected part is controlled based on the phase of the patient's breathing. In addition, a technique has been disclosed in which treatment is performed by changing the shape of the radiation shielding plate, that is, by changing the irradiation field.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a method for imaging a diseased part of a patient obtained by using an X-ray simulator.
From the R image, the contour of the affected part shape and the irradiation field shape are set, and C
It is an object of the present invention to obtain a radiation treatment planning apparatus capable of calculating a radiation dose together with a T image and obtaining a more appropriate dose distribution.

[0005]

A radiotherapy planning apparatus according to the present invention takes in a DR image obtained by an X-ray simulator apparatus and takes an image of an affected part of a patient online, and inputs a contour of the affected part shape on the DR image. In a radiation treatment planning apparatus for obtaining an irradiation field shape in accordance with the contour shape, a CT image obtained by imaging a body cross section of an affected part of a patient obtained by an X-ray CT apparatus is taken, and an irradiation field shape obtained from the DR image is obtained. And a function of calculating a radiation dose to irradiate the affected part of the patient based on the CT image to obtain a dose distribution.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1. Next, an embodiment of the present invention will be described. FIG. 1 is a diagram showing a flow of a treatment plan using DR images. In this figure, reference numeral 1a denotes an X-ray simulator, 1b denotes an X-ray CT,
Reference numeral 2 denotes a radiation treatment planning apparatus for setting irradiation conditions and the like of radiation for irradiating an affected part based on electronic data of a DR image obtained by the X-ray simulator apparatus 1a and electronic data of a CT image obtained by the X-ray CT apparatus 1b. Reference numeral 3 denotes a data management device having a function of capturing radiation irradiation conditions and the like set by the radiation treatment planning device 2. Reference numeral 4 denotes a radiation irradiation device that irradiates radiation based on data received from the data management device 3. Each device is connected by LAN.

FIG. 2 shows an image of the same affected area.
1 shows a DR image 6 captured by an X-ray simulator apparatus 1a and a CT image 7 which is a tomographic image of a patient's body section taken at predetermined intervals using an X-ray CT apparatus 1b. Reference numeral 8 denotes the outline of the affected part shown on the DR image 6, and reference numeral 9 denotes the outline of the affected part shown on the CT image 7.

Next, the flow of a treatment plan will be described.
DR image 6 captured by X-ray simulator 1
Is transmitted online to the radiation treatment planning apparatus 2 as electronic data to which patient information and the like are added. The patient information includes patient ID, name, date of birth, gender, and the like. The radiation treatment planning device 2 inputs a region of interest, which is an affected area of the patient, on the received DR image 6, and automatically sets the irradiation field shape in accordance with the region. The information of the region of interest and the irradiation field shape set on the DR image 6 as described above is used when calculating the radiation dose.

The radiation treatment planning apparatus 2 has a function of calculating a radiation dose to irradiate an affected part and obtaining a dose distribution in addition to setting a region of interest and an irradiation field shape as described above. Conventionally, the dose distribution was obtained only from the data of the CT image. In the present invention, the dose applied to the region of interest is calculated based on the CT image and the irradiation field shape obtained from the DR image. Ask for. Conventionally, in order to calculate a radiation dose given to a region of interest by combining information of the region of interest and the shape of the irradiation field set on the DR image 6 as well as the region of interest and the shape of the irradiation field obtained from only the CT image. It is possible to obtain a more appropriate dose distribution. The obtained dose distribution can be displayed not only on the CT image 7 but also on the DR image 6.

The parameters such as the irradiation field shape and the dose distribution set by the radiation treatment planning device 2 are transmitted to the data management device 3 and used when the radiation irradiation device 4 irradiates the affected part. As shown in FIG. 1, by connecting the radiation treatment planning device 2, the X-ray simulator device 1a, the X-ray CT device 1b, the data management device 3, and the radiation irradiation device 4 by LAN, data handling becomes easy. This has the effect.

As described above, in addition to obtaining the contour 8 of the affected part from the electronic data of the DR image 6 and setting the irradiation field shape,
By calculating the radiation dose based on the electronic data of the DR image 6 and the CT image 7 and obtaining the dose distribution, it is more appropriate than in the conventional case where the radiation dose is calculated only from the data of the CT image. It is possible to obtain a proper dose distribution, and the parameters of the dose distribution can be used in the treatment by the radiation irradiation device 4.

[0012]

The radiation treatment planning apparatus according to the present invention
In a radiotherapy planning apparatus, a DR image obtained by imaging an affected part of a patient obtained by an X-ray simulator apparatus is taken online, a contour of the affected part shape is input on the DR image, and an irradiation field shape is determined according to the contour shape. , X
A CT image obtained by imaging the body cross section of the affected part of the patient obtained by the X-ray CT apparatus is captured, and based on the irradiation field shape obtained from the DR image and the CT image, a radiation dose to be irradiated on the affected part of the patient is calculated. Because it has a function to calculate the dose distribution, it not only calculates the contour and irradiation field shape of the affected part shape of the patient from only the CT image, but also calculates the radiation dose based on the CT image and the DR image. It is possible to obtain an appropriate dose distribution. Furthermore, it is possible to take in the DR image data online from the X-ray simulator apparatus to the radiation treatment planning apparatus, and there is an effect that data handling becomes easy.

[Brief description of the drawings]

FIG. 1 is a diagram showing a flow of a treatment plan according to Embodiment 1 of the present invention.

FIG. 2 is a diagram showing a DR image and C according to Embodiment 1 of the present invention;
It is a figure showing a T picture.

[Explanation of symbols]

1a X-ray simulator, 1b X-ray CT,
2 radiation treatment planning device, 3 data management device, 4
Radiation irradiation device, 6 DR image, 7 CT image,
8, 9 The contour of the affected area.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 2G088 EE01 EE02 FF02 FF17 FF19 KK32 KK33 LL08 4C082 AC02 AC09 AE01 AG21 AJ08 AN05 AP03 4C093 AA22 AA25 AA30 CA50 EE01 FF28 FF50 FG16 FH06

Claims (1)

[Claims] 1. A DR image obtained by imaging an affected part of a patient obtained by an X-ray simulator apparatus is taken online, a contour of the affected part shape is input on the DR image, and an irradiation field shape is determined according to the contour shape. In a radiation treatment planning apparatus, a CT image obtained by capturing a cross section of a patient's body obtained by an X-ray CT apparatus is fetched, and radiation to irradiate an affected part of the patient based on the irradiation field shape obtained from the DR image and the CT image. A radiation treatment planning apparatus having a function of calculating a dose and obtaining a dose distribution.