JP4691574B2 - 荷電粒子ビーム出射装置及び荷電粒子ビーム出射方法 - Google Patents
荷電粒子ビーム出射装置及び荷電粒子ビーム出射方法 Download PDFInfo
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Description
加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に加速器から出射される荷電粒子ビームの量が設定量となるように制御することにある。これにより、レンジモジュレーションホイールを用いて多様なSOBPを得る方法やペンシルビームスキャニングのように出射工程中にビームの出射及び出射停止が繰り返し行われる場合においても、1周期内に照射装置から出射されるビーム量が減少することがない。したがって、患者に対する照射時間を短縮でき、単位時間当りの治療患者数を増加することができる。
本発明の好適な一実施形態である粒子線出射装置を、図1を用いて説明する。本実施形態の粒子線出射装置は、イオンビーム発生装置1と、イオンビーム発生装置1の下流側に接続されたビーム輸送系2とを有している。
本発明の他の実施形態である実施形態2の荷電粒子ビーム出射装置を、図11を参照して以下に説明する。
本発明の他の実施形態である実施形態3の荷電粒子ビーム出射装置を、図12を用いて以下に説明する。本実施形態は、スキャニング照射方式の荷電粒子ビーム出射装置に本発明を適用した例である。
以上述べた実施形態1乃至3では加速器としてシンクロトロンを用いるようにしたが、本発明は加速器としてサイクロトロンを用いた荷電粒子ビーム出射装置にも適用することができる。このサイクロトロンを用いた荷電粒子ビーム出射装置を図13を用いて説明する。
4A サイクロトロン(加速器)
8 高周波電源(ビーム出射量調整装置、ビーム強度調整装置)
9 開閉スイッチ(ビーム出射量調整装置、出射時間調整装置)
16 照射装置
16’ 照射装置
62 タイミング制御装置(制御装置、出射可能時間設定装置、積算装置、判定装置、出射停止装置)
62A タイミング制御装置(制御装置、出射可能時間設定装置、積算装置、判定装置、出射停止装置)
63 高周波出力制御装置(制御装置、ビーム強度設定装置)
63A 高周波出力制御装置(制御装置、ビーム強度設定装置)
Claims (10)
- 荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射装置において、
前記荷電粒子ビームの入射、加速及び出射工程を含むパターン運転を周期的に行う加速器と、
前記加速器から出射される前記荷電粒子ビームの量を変更するビーム出射量調整装置と、
前記加速器の出射工程中に前記荷電粒子ビームの出射停止が少なくとも1回行われる場合に、前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように前記ビーム出射量調整装置を制御する制御装置とを備えたことを特徴とする荷電粒子ビーム出射装置。 - 荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射装置において、
前記荷電粒子ビームの入射、加速及び出射工程を含むパターン運転を周期的に行う加速器と、
前記加速器の出射工程の時間を変更する出射時間調整装置と、
前記加速器の出射工程中に前記荷電粒子ビームの出射停止が少なくとも1回行われる場合に、前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように前記出射時間調整装置を制御する制御装置とを備えたことを特徴とする荷電粒子ビーム出射装置。 - 荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射装置において、
前記荷電粒子ビームの入射、加速及び出射工程を含むパターン運転を周期的に行う加速器と、
前記加速器から出射される前記荷電粒子ビームの強度を変更するビーム強度調整装置と、
前記加速器の出射工程中に前記荷電粒子ビームの出射停止が少なくとも1回行われる場合に、前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように前記ビーム強度調整装置を制御する制御装置とを備えたことを特徴とする荷電粒子ビーム出射装置。 - 前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記加速器の前記荷電粒子ビームの出射可能時間を設定する出射可能時間設定装置、前記加速器から前記荷電粒子ビームが出射された時間を積算する積算装置、及び前記積算した出射時間が前記設定した出射可能時間に到達したかどうかを判定する判定装置を有する前記制御装置を備えたことを特徴とする請求項2記載の荷電粒子ビーム出射装置。
- 前記判定装置により前記積算した出射時間が前記設定した出射可能時間に到達したと判定された場合に、前記加速器からの前記荷電粒子ビームの出射を停止させる出射停止装置を備えたことを特徴とする請求項4記載の荷電粒子ビーム出射装置。
- 前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記加速器から出射される前記荷電粒子ビームの強度を設定するビーム強度設定装置、及び前記設定したビーム強度となるように前記加速器中を周回する前記荷電粒子ビームに印加する高周波出力を制御する高周波出力制御装置を有する前記制御装置を備えたことを特徴とする請求項3記載の荷電粒子ビーム出射装置。
- 荷電粒子ビームの入射、加速及び出射工程を含むパターン運転を周期的に行う加速器から出射された前記荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射方法において、
前記加速器の出射工程中に出射停止が少なくとも1回行われる場合に、前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように制御することを特徴とする荷電粒子ビーム出射方法。 - 荷電粒子ビームの入射、加速及び出射工程を含むパターン運転を周期的に行う加速器から出射された前記荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射方法において、
前記加速器の出射工程中に出射停止が少なくとも1回行われる場合に、前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように前記加速器の出射工程の時間を変更することを特徴とする荷電粒子ビーム出射方法。 - 荷電粒子ビームの入射、加速及び出射工程を含むパターン運転を周期的に行う加速器から出射された前記荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射方法において、
前記加速器の出射工程中に出射停止が少なくとも1回行われる場合に、前記加速器の出射工程中における出射時間と出射停止時間との比率に基づき、前記パターン運転の1周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように前記加速器から出射される前記荷電粒子ビームの強度を変更することを特徴とする荷電粒子ビーム出射方法。 - 荷電粒子ビームを照射装置から出射させる荷電粒子ビーム出射装置において、
前記荷電粒子ビームを周期的に出射・停止させる加速器と、
前記加速器から出射される前記荷電粒子ビームの強度を変更するビーム強度調整装置と、
前記加速器から出射される荷電粒子ビームの出射停止がある周期内に行われる場合に、前記加速器の出射時間と出射停止時間との比率に基づき、その周期内に前記加速器から出射される前記荷電粒子ビームの量が設定量となるように前記ビーム強度調整装置を制御する制御装置とを備えたことを特徴とする荷電粒子ビーム出射装置。
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