JP2022509858A - コーンビームコンピュータ断層撮影における最適なパネル読み出しのための非対称散乱フィッティング - Google Patents
コーンビームコンピュータ断層撮影における最適なパネル読み出しのための非対称散乱フィッティング Download PDFInfo
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Abstract
Description
本出願は、2018年11月30日に出願の米国仮特許出願第62/773,712号明細書(代理人整理番号38935/04001)、2018年11月30日出願の米国仮特許出願第62/773,700号明細書(代理人整理番号38935/04002);2019年1月25日出願の米国仮特許出願第62/796,831号明細書(代理人整理番号38935/04004);2019年2月1日出願の米国仮特許出願第62/800,287明細書(代理人整理番号38935/04003);2019年2月5日出願の米国仮特許出願第62/801,260号明細書(代理人整理番号38935/04006);2019年3月4日出願の米国仮特許出願第62/813,335号明細書(代理人整理番号38935/04007);2019年3月20日出願の米国仮特許出願第62/821,116号明細書(代理人整理番号38935/04009);2019年4月19日出願の米国仮特許出願第62/836,357号明細書(代理人整理番号38935/04016);2019年4月19日出願の米国仮特許出願第62/836,352号明細書(代理人整理番号38935/04017);2019年5月6日出願の米国仮特許出願第62/843,796号(代理人整理番号38935/04005)明細書;および2019年7月25日に出願の米国仮特許出願第62/878,364号明細書(代理人整理番号38935/04008)を含む、11件の米国仮特許出願の利益を主張する。本出願はまた、「MULTIMODAL RADIATION APPARATUS AND METHODS」と題する代理人整理番号38935/04019、「APPARATUS AND METHODS FOR SCALABLE FIELD OF VIEW IMAGING USING A MULTI-SOURCE SYSTEM」と題する代理人整理番号38935/04020;「INTEGRATED HELICAL FAN-BEAM COMPUTED TOMOGRAPHY IN IMAGE-GUIDED RADIATION TREATMENT DEVICE」と題する代理人整理番号38935/04011、;「COMPUTED TOMOGRAPHY SYSTEM AND METHOD FOR IMAGE IMPROVEMENT USING PRIOR IMAGEと題する代理人整理番号38935/04010;「OPTIMIZED SCANNING METHODS AND TOMOGRAPHY SYSTEM USING REGION OF INTEREST DATA 」と題する代理人整理番号第38935/04013号;「HELICAL CONE-BEAM COMPUTED TOMOGRAPHY IMAGING WITH AN OFF-CENTERED DETECTOR」と題する代理人整理番号第38935/04015号;「MULTI-PASS COMPUTED TOMOGRAPHY SCANS FOR IMPROVED WORKFLOW AND PERFORMANCE」と題する代理人整理番号38935/04021;「METHOD AND APPARATUS FOR SCATTER ESTIMATION IN CONE-BEAM COMPUTED TOMOGRAPHY」と題する代理人整理番号38935/04012号;「METHOD AND APPARATUS FOR IMPROVING SCATTER ESTIMATION AND CORRECTION IN IMAGING」と題する代理人整理番号38935/04018、および「METHOD AND APPARATUS FOR IMAGE RECONSTRUCTION AND CORRECTION USING INTER-FRACTIONAL INFORMATION」と題する代理人整理番号38935/04022を含む、同日に出願された10件の米国非仮特許出願に関連する。上記のすべての特許出願(複数可)および特許(複数可)の内容は、参照により本明細書に完全に組み込まれる。
これは、非対称散乱フィッティングと呼ぶことができる。
Claims (20)
- x線撮像装置であって、
放射線ビームを発するための回転式x線源と、
前記x線源から放射線を受け取るように配置されたx線検出器であって、読み出し範囲を含む、x線検出器と、
前記x線源によって発せられた前記放射線ビームの形状を調整するように構成されたビームフォーマであって、それによって前記x線検出器の一次領域は、前記放射線ビームに直接露出され、前記x線検出器の少なくとも1つのシャドウ領域は、前記ビームフォーマによって、前記放射線ビームへの直接露出からブロックされる、ビームフォーマと
を備え、
前記一次領域のアパーチャ中心は、前記読み出し範囲の読み出し中心からオフセットされる、
x線撮像装置。 - データ処理システムをさらに備え、前記データ処理システムは、
前記一次領域内の測定された投影データおよび前記少なくとも1つのシャドウ領域内の測定された散乱データを受け取るように構成され、また
前記少なくとも1つのシャドウ領域内の前記測定された散乱データに基づいて、前記一次領域内の推定される散乱を決定するように構成される、
請求項1に記載のx線撮像装置。 - 前記データ処理システムが、さらに、
少なくとも1つの半影域内の測定された半影データを受け取るように構成され、また
前記少なくとも1つの半影領域内の前記測定された半影データに基づいて、前記一次領域内の前記推定される散乱を決定するように構成される、
請求項2に記載のx線撮像装置。 - 前記ビームフォーマが、前記一次領域の前記アパーチャ中心が前記x線検出器の検出器中心からオフセットされるように前記放射線ビームの位置を調整する、請求項1に記載のx線撮像装置。
- 前記読み出し範囲の前記読み出し中心が、前記x線検出器の検出器中心からオフセットされる、請求項1に記載のx線撮像装置。
- 前記ビームフォーマが、前記一次領域の前記アパーチャ中心が前記x線検出器の検出器中心からオフセットされるように前記放射線ビームの位置を調整し、前記読み出し範囲の前記読み出し中心は、前記x線検出器の検出器中心からオフセットされる、請求項1に記載のx線撮像装置。
- 前記x線検出器の前記少なくとも1つのシャドウ領域は、後方軸方向長さを有する後方シャドウ領域と、前方軸方向長さを有する前方シャドウ領域とを含み、前記後方軸方向長さは前記前方軸方向長さと等しくない、請求項1に記載のx線撮像装置。
- x線画像における散乱を推定する方法であって、
x線検出器の一次領域からの測定された投影データを受け取るステップであって、前記x線検出器の前記一次領域は、少なくとも1回の走査中に放射線源からの放射線ビームに直接露出される、ステップと、
前記x線検出器の少なくとも1つのシャドウ領域からの測定された散乱データを受け取ることであって、前記x線検出器の前記少なくとも1つのシャドウ領域は、前記放射線ビームへの直接露出からブロックされる、ステップと、
前記少なくとも1つのシャドウ領域内の前記測定された散乱データに基づいて、前記測定された投影データ内の推定される散乱を決定するステップと
を含み、
前記一次領域のアパーチャ中心は、前記少なくとも1つの走査中に前記読み出し範囲の読み出し中心からオフセットされる、
方法。 - 前記一次領域の前記アパーチャ中心が前記x線検出器の前記読み出し中心からオフセットされるように前記放射線ビームの位置を調整するステップをさらに含む、請求項8に記載の方法。
- 前記少なくとも1つの走査が、第1の走査と、第2の走査とを含み、前記少なくとも1つのシャドウ領域が、第1のシャドウ領域と、第2のシャドウ領域とを含み、前記方法は、
前記第1の走査中に前記第1のシャドウ領域が前記読み出し範囲の第1の側と重なり、前記第2の走査中に前記第2のシャドウ領域が前記読み出し範囲の第2の側と重なるように、前記第1の走査と前記第2の走査との間の前記放射線ビームの位置を調整するステップ
をさらに含み、
前記測定された投影データ内の前記推定される散乱を決定するステップが、前記第1のシャドウ領域および前記第2のシャドウ領域内の前記測定された散乱データに基づく、
請求項8に記載の方法。 - 前記読み出し範囲の前記第2の側が、前記第1の走査中に前記第1のシャドウ領域の反対側の第1の半影領域と位置合わせし、前記読み出し範囲の前記第1の側が、前記第2の走査中に前記第2のシャドウ領域の反対側の第2の半影領域と位置合わせする、請求項10に記載の方法。
- 前記第1の走査が第1の放射線量を含み、前記第2の走査が前記第1の放射線量とは異なる第2の放射線量を含む、請求項10に記載の方法。
- 前記測定された投影データ内の前記推定される散乱を決定するステップが、前記第1の放射線量と前記第2の放射線量との間の差に基づいて、前記第1のシャドウ領域または前記第2のシャドウ領域の少なくとも一方内の前記測定された散乱データをスケーリングすることを含む、請求項12に記載の方法。
- 前記測定された投影データ内の前記推定される散乱を決定するステップが、前記第1の放射線量と前記第2の放射線量との間の差に基づいて、前記第1の走査または前記第2の走査の少なくとも一方からの前記測定された投影データをスケーリングすることを含む、請求項12に記載の方法。
- 前記測定された投影データ内の前記推定される散乱を決定するステップが、前記第1の走査および前記第2の走査からの前記測定された投影データを一緒に再構成することを含む、請求項10に記載の方法。
- 少なくとも1つの半影内の測定された半影データを受け取るステップと、
前記少なくとも1つの半影領域内の前記測定された半影データに基づいて、前記一次領域内の前記推定される散乱を決定するステップと
をさらに含む、請求項8に記載の方法。 - 前記少なくとも1つの半影領域内の前記測定された半影データに基づいて前記一次領域内の前記推定される散乱を決定するステップが、半影領域画素に隣接する一次領域画素内の前記推定される散乱を決定することを含む、請求項16に記載の方法。
- 前記少なくとも一つの半影領域内の前記測定された半影データに基づいて前記一次領域内の前記推定される散乱を決定することが、反復プロセスを含む、請求項17に記載の方法。
- 前記一次領域内の前記推定される散乱を決定するステップが、前記少なくとも1つのシャドウ領域内の前記測定された散乱データを前記少なくとも1つの半影領域内の前記測定された半影データとは異なって重み付けすることを含む、請求項16に記載の方法。
- 放射線療法送達デバイスであって、
患者支持体の周りに少なくとも部分的に配置された回転可能なガントリシステムと、
前記回転可能なガントリシステムに結合された第1の放射線源であって、治療用放射線源として構成される、第1の放射線源と、
前記回転可能なガントリシステムに結合された第2の放射線源であって、前記治療放射線源よりも低いエネルギーレベルを有する撮像放射線源として構成される、第2の放射線源と、
前記回転可能なガントリシステムに結合され、前記第2の放射線源からの放射線を受け取るように配置された放射線検出器と、
前記第2の放射線源によって発せられる放射線ビームの形状を調整するように構成されたビームフォーマであって、それにより、前記放射線検出器の一次領域は、前記放射線ビームに直接露出され、前記放射線検出器の少なくとも1つのシャドウ領域は、前記ビームフォーマによって、前記放射線ビームへの直接露出からブロックされる、ビームフォーマと、
データ処理システムであって、
前記一次領域内の測定された投影データおよび前記少なくとも1つのシャドウ領域内の測定された散乱データを受け取るように構成され、
前記少なくとも1つのシャドウ領域内の前記測定された散乱データに基づいて前記一次領域内の推定される散乱を決定するように構成され、前記一次領域のアパーチャ中心は前記読み出し範囲の読み出し中心からオフセットされ、
前記推定される散乱に基づいて患者画像を再構成するように構成され、
前記適応IGRT中の前記患者画像に基づいて前記第1の放射線源を介して前記患者に治療法放射線の線量を送達するように構成される、データ処理システムと
を備える、放射線療法送達デバイス。
Applications Claiming Priority (23)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862773700P | 2018-11-30 | 2018-11-30 | |
US201862773712P | 2018-11-30 | 2018-11-30 | |
US62/773,712 | 2018-11-30 | ||
US62/773,700 | 2018-11-30 | ||
US201962796831P | 2019-01-25 | 2019-01-25 | |
US62/796,831 | 2019-01-25 | ||
US201962800287P | 2019-02-01 | 2019-02-01 | |
US62/800,287 | 2019-02-01 | ||
US201962801260P | 2019-02-05 | 2019-02-05 | |
US62/801,260 | 2019-02-05 | ||
US201962813335P | 2019-03-04 | 2019-03-04 | |
US62/813,335 | 2019-03-04 | ||
US201962821116P | 2019-03-20 | 2019-03-20 | |
US62/821,116 | 2019-03-20 | ||
US201962836352P | 2019-04-19 | 2019-04-19 | |
US201962836357P | 2019-04-19 | 2019-04-19 | |
US62/836,352 | 2019-04-19 | ||
US62/836,357 | 2019-04-19 | ||
US201962843796P | 2019-05-06 | 2019-05-06 | |
US62/843,796 | 2019-05-06 | ||
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