JPH0187765U - - Google Patents
Info
- Publication number
- JPH0187765U JPH0187765U JP18414287U JP18414287U JPH0187765U JP H0187765 U JPH0187765 U JP H0187765U JP 18414287 U JP18414287 U JP 18414287U JP 18414287 U JP18414287 U JP 18414287U JP H0187765 U JPH0187765 U JP H0187765U
- Authority
- JP
- Japan
- Prior art keywords
- collimator
- opening
- signal
- irradiation field
- comparing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010894 electron beam technology Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 claims 1
- 238000001959 radiotherapy Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Radiation-Therapy Devices (AREA)
Description
第１図は本考案の一実施例の構成を示すブロツ
ク図である。
１…スキヤタリングフオイル、２…コリメータ
、３…照射ヘツド、４…照射野可変形電子線ガイ
ド、５…照射野開度信号発生器、６…Ａ／Ｄ変換
器、７…マイクロプロセツサ、８…Ｄ／Ａ変換器
、９…コリメータ開度信号発生器、１０…差動増
幅器、１１…インターロツク回路、１２…モータ
駆動回路、１３…コリメータ駆動用モータ。
FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Scattering oil, 2... Collimator, 3... Irradiation head, 4... Irradiation field variable electron beam guide, 5... Irradiation field opening signal generator, 6... A/D converter, 7... Microprocessor, 8...D/A converter, 9...Collimator opening signal generator, 10...Differential amplifier, 11...Interlock circuit, 12...Motor drive circuit, 13...Collimator drive motor.
Claims (1)
いて、照射野に応じた照射野開度信号を発生する
手段を備えた照射野可変形電子線ガイドと、前記
照射野開度信号をコリメータ開度設定信号に変換
する変換手段と、コリメータの開度に応じたコリ
メータ開度信号を発生する手段を備えたコリメー
タと、前記コリメータ開度設定信号と前記コリメ
ータ開度信号とを比較する比較手段と、前記比較
手段の出力に応じて前記コリメータの開度を制御
するコリメータ駆動手段と、前記比較手段の出力
に基づきコリメータが定められた開度にないとき
には放射線の発生を止める手段とを具備して成る
ことを特徴とするコリメータ開度制御装置。 A collimator opening control device for a radiation therapy machine includes a variable irradiation field electron beam guide including a means for generating an irradiation field opening signal according to the irradiation field, and a collimator opening setting signal that converts the irradiation field opening signal into a collimator opening setting signal. a collimator comprising a converting means for converting the opening into a collimator opening, a means for generating a collimator opening signal according to the opening of the collimator, a comparing means for comparing the collimator opening setting signal and the collimator opening signal, and a comparing means for comparing the collimator opening setting signal and the collimator opening signal; Collimator driving means for controlling the opening degree of the collimator according to the output of the means, and means for stopping the generation of radiation when the collimator is not at a predetermined opening degree based on the output of the comparison means. Features collimator opening control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18414287U JPH0187765U (en) | 1987-12-01 | 1987-12-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18414287U JPH0187765U (en) | 1987-12-01 | 1987-12-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0187765U true JPH0187765U (en) | 1989-06-09 |
Family
ID=31475522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18414287U Pending JPH0187765U (en) | 1987-12-01 | 1987-12-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0187765U (en) |
-
1987
- 1987-12-01 JP JP18414287U patent/JPH0187765U/ja active Pending