JP4686128B2 - 放射線送達装置の制御方法及び放射線治療を送達するシステム - Google Patents
放射線送達装置の制御方法及び放射線治療を送達するシステム Download PDFInfo
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- A61N2005/1061—Monitoring, verifying, controlling systems and methods for verifying the position of the patient with respect to the radiation beam using an x-ray imaging system having a separate imaging source
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- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/103—Treatment planning systems
- A61N5/1038—Treatment planning systems taking into account previously administered plans applied to the same patient, i.e. adaptive radiotherapy
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- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
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- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
- A61N5/1065—Beam adjustment
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- A—HUMAN NECESSITIES
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- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
- A61N5/1065—Beam adjustment
- A61N5/1067—Beam adjustment in real time, i.e. during treatment
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
- A61N5/1069—Target adjustment, e.g. moving the patient support
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Description
放射線治療用の医療機器は、高エネルギー放射で腫瘍状組織を処置する。放射量およびその位置を正確に制御して、腫瘍状組織が破壊されるのに十分な放射を与え、周囲の隣接する非腫瘍状組織に対する損傷を最小限に抑えるようにしなければならない。
この方法に必要な入力は、1)部分CT画像、2)部分CT内の関連する解剖学的フィーチャの輪郭、3)部分CTについての線量分布であり、この線量分布は、部分CTについて直接計算するか、あるいは、間接的に計画CTについて計算し、画像融合とも称する重ね合わせにより部分CTに一致するように位置合わせする。
様々な重ね合わせ技術を用いることによって、本発明の様々な実施形態が実現される。基本的には、計画画像および部分画像を整列させて、処置前にどんな改変が必要とされるかを決定する。好ましくは、この重ね合わせは、自動化または半自動化された融合によって実施される。
本発明の方法では、オンラインCTまたは部分画像を取得する他の手段を用いて、放射線治療計画を完全に最適化し直さずに、標的構造への放射送達を改善する。より具体的には、患者に前処置を施すために体位固定する位置および規定部分についての内部の解剖学的構造の位置が、計画位置から剛体回転および並進移動分だけ異なるとき、既存の方法を用いて患者のこれらのオフセット量を決定し、同様に、この変位した位置を反映するように、患者の移動または送達の改変によってこれらのオフセット量を補正し得る。しかし、内部の解剖学的構造の変化の場合には、従来の方法が求める「正しい」患者の再位置決めでは、任意の標的および感受性構造に所望の線量が分配されないことがある。その代わりに、CADRを用いて線量分布に関して好ましい位置に患者を移動させ(または、処置を並進移動させ)、かつ/または、患者の現在の解剖学的構造が与えられる場合には、MMODSを用いて、所望の線量分布を実現するのにより適切な代替処置計画を選択し得る。
図11は、本発明の別の実施形態による改善された適応放射線治療法のブロック図である。
Claims (32)
- 放射線送達装置を制御して所望の線量分布を達成する方法であって、
前記放射線送達装置は、他の構造に対する標的領域の位置を判定するために標的領域の第1画像を取得し、
前記放射線送達装置は、少なくとも前記第1画像に基づき、計画された線量分布を含んだ計画を生成し、
前記放射線送達装置は、線量の計算に使用される3次元の解剖学的な標的領域の第2画像を取得し、
前記放射線送達装置は、前記第1画像及び第2画像を比較し、
前記放射線送達装置は、その比較に基づき、前記標的領域によって受け入れられるべき線量を調整することからなる方法。 - 前記放射線送達装置は、前記計画に基づいて計画された線量分布を生成することを更に含む請求項1に記載の方法。
- 前記放射線送達装置は、前記標的領域の第2画像に基づいて線量分布を再位置決めすることを更に含む請求項1に記載の方法。
- 前記放射線送達装置は、前記計画及び線量分布を改変することを更に含む請求項1に記載の方法。
- 前記放射線送達装置は、前記線量分布に対して標的領域の位置を調整することを更に含む請求項1に記載の方法。
- 前記線量分布の生成は、前記放射線送達装置により、前記第2画像に基づいて線量分布を生成することである請求項2に記載の方法。
- 前記線量分布は前記標的領域の位置の変化を考慮して、前記放射線送達装置によって改変される請求項1に記載の方法。
- 前記放射線送達装置は、前記第2画像に基づいて予め存在する複数の計画から一つの計画を選択することを更に含む請求項1に記載の方法。
- 複数の計画は物体関数によって生成される請求項8に記載の方法。
- 物体関数及び重み付けは微調整処理の送達に対して調整される請求項9に記載の方法。
- 使用者のトレーニングに基づいて、物体関数の重みが学習される請求項10に記載の方法。
- 標的領域の移動、送達の改変、まらは、それら2つの組み合わせのいずれかによって結果が利用される請求項1に記載の方法。
- 手作業の輪郭処理、自動輪郭処理、変形可能な融合、テンプレート・ベースの自動輪郭処理、またはこれらの組合せのいずれかによって、前記放射線送達装置が輪郭を形成することを更に含む請求項1に記載の方法。
- 標的領域によって受け入れられるべき線量の調整は、前記放射線送達装置が線量分布を改善するために標的領域を再位置決めすることを含む請求項1に記載の方法。
- 前記標的領域の画像はCT,MRIのいずれかを使用して取得される請求項1に記載の方法。
- 前記計画は、最初に利用可能な画像、関連する計画、及び最初の計画の後で得られた画像を含む請求項12に記載の方法。
- 標的領域によって受け入れられるべき線量の調整は、画像情報、輪郭情報、線量−体積ヒストグラム、および、標的領域の再位置決めのための線量測定情報のいずれかを、前記放射線送達装置が利用することを含む請求項1に記載の方法。
- 放射線送達装置の制御方法であって、
前記放射線送達装置は、標的領域の第1画像を取得し、
前記放射線送達装置は、前記第1画像に基づいて複数の放射計画を生成し、
前記放射線送達装置は、前記標的領域の少なくとも3次元の解剖学的な第2画像を取得し、
前記放射線送達装置は、前記第2画像からの線量測定情報に少なくとも部分的に基づいて前記放射計画のひとつを選択すること
からなる方法。 - 前記第1画像及び第2画像中の標的領域の位置とは異なる標的領域の位置に基づいて異なる放射計画を、前記放射線送達装置が生成することを更に含む請求項18に記載の方法。
- 前記放射線送達装置は、前記第1画像中の標的領域の位置を第2画像中の標的領域の位置と比較することを更に含む請求項18に記載の方法。
- 前記各計画は前記第1画像中の標的領域の位置に基づき、標的領域の周りにマージンを形成する輪郭を含む請求項18に記載の方法。
- 前記第2画像は線量計算に適したものである請求項18に記載の方法。
- 放射線送達装置の制御方法であって、
前記放射線送達装置は、標的領域の第1画像を取得し、
前記放射線送達装置は、前記標的領域のために前記第1画像に基づく放射計画を取得し、
前記放射線送達装置は、3次元の輪郭形成に適した標的領域の第2画像を取得し、
前記放射線送達装置は、前記第2画像上に輪郭を生成し、
前記放射線送達装置は、線量測定情報及び前記輪郭に基づき、放射線送達装置に関して標的領域の位置を特定すること
からなる方法。 - 前記第2画像は線量の計算に適したものである請求項23に記載の方法。
- 前記標的領域の位置の特定は前記線量の計算に更に基づくものである請求項24に記載の方法。
- 前記放射線送達装置は、少なくとも部分的に前記第1画像に基づく複数の計画を生成することを更に含む請求項23に記載の方法。
- 前記放射線送達装置は、前記標的領域への送達のために複数の計画から一つの計画を選択することを更に含み、選択された計画は標的領域の所望の位置に基づくものである請求項26に記載の方法。
- 前記線量測定情報は前記第1画像から得られる請求項23に記載の方法。
- 前記線量測定情報は前記第2画像から得られる請求項23に記載の方法。
- 前記線量測定情報は前記第1画像及び第2画像の組み合わせから得られる請求項23に記載の方法。
- 放射線治療を送達するシステムにおいて、
コンピュータと、
コンピュータに接続されるとともに、標的領域を特定する第1画像に基づき、計画された線量分布を含む放射線治療計画に関する情報を格納し、かつ、標的領域を特定する第2画像に関する情報を格納するデータベースとを備え、前記第2画像は標的領域が所定の位置にあるときに取得され、かつ、線量計算に適したものであり、
前記コンピュータによってアクセス可能であってコンピュータにて読み取り可能な媒体中に格納され、かつ、第1画像と第2画像との間の標的領域の位置における変化を決定するために動作可能であるとともに、標的領域への放射線の送達前に、標的領域によって受け入れられるべき計画された線量分布に基づき、標的領域の位置及び放射線治療計画の一方を自動的に変更するために動作可能なソフトウェアプログラムをさらに備えるシステム。 - 前記標的領域は患者の内部にある請求項31に記載のシステム。
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US36211202P | 2002-03-06 | 2002-03-06 | |
PCT/US2003/007014 WO2003076003A2 (en) | 2002-03-06 | 2003-03-06 | Method for modification of radiotherapy treatment delivery |
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EP (1) | EP1480716A4 (ja) |
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AU (1) | AU2003213771A1 (ja) |
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- 2003-03-06 EP EP03711462A patent/EP1480716A4/en not_active Ceased
- 2003-03-06 JP JP2003574268A patent/JP4686128B2/ja not_active Expired - Lifetime
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AU2003213771A8 (en) | 2003-09-22 |
JP2005518908A (ja) | 2005-06-30 |
WO2003076003A3 (en) | 2003-11-13 |
US8406844B2 (en) | 2013-03-26 |
EP1480716A2 (en) | 2004-12-01 |
EP1480716A4 (en) | 2006-02-08 |
AU2003213771A1 (en) | 2003-09-22 |
WO2003076003A2 (en) | 2003-09-18 |
CA2478296A1 (en) | 2003-09-18 |
US20050201516A1 (en) | 2005-09-15 |
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