JP6838057B2 - 種々のイメージング・モダリティを用いて得られる画像を位置合せし、画像レジストレーションを検証するためのシステムおよび方法 - Google Patents
種々のイメージング・モダリティを用いて得られる画像を位置合せし、画像レジストレーションを検証するためのシステムおよび方法 Download PDFInfo
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Description
Claims (24)
- 第1イメージング・システムおよび第2イメージング・システムを用いて得られる内側解剖学的対象の画像のレジストレーションを検証するための方法であって、
(a)第1イメージング・システムを用いて、解剖学的対象および第3イメージング・システムの少なくとも一部分の第1画像を得ること、
(b)第3イメージング・システムを用いて、第3イメージング・システムと解剖学的対象との間の距離を測定すること、
(c)第2イメージング・システムを用いて、解剖学的対象の第2画像を得ること、
(d)前記レジストレーションを用いて、第1画像および第2画像を位置合せすること、ならびに
(e)(i)第1画像における第3イメージング・システムの少なくとも一部分および解剖学的対象の位置、ならびに(ii)前記測定された距離に基づいて、前記レジストレーションの誤差を算出することを含んで成る、方法。 - 第1イメージング・システム、第2イメージング・システムおよび第3イメージング・システムが、磁気共鳴イメージング(MRI)システム、コンピュータ・トポグラフィ(CT)システムおよび超音波トランスデューサ・システムをそれぞれ含んで成る、請求項1に記載の方法。
- 第3イメージング・システムの座標系における第3イメージング・システムの少なくとも一部分の位置を得ることをさらに含んで成る、請求項1に記載の方法。
- 第3イメージング・システムの座標系における第3イメージング・システムの少なくとも一部分の位置が、飛行時間法に基づいて決定される、請求項3に記載の方法。
- 第1画像および第3イメージング・システムの座標系における第3イメージング・システムの少なくとも一部分の位置に基づいて、第1イメージング・システムの座標系および第3イメージング・システムの座標系を関連付ける変換を算出することをさらに含んで成る、請求項3に記載の方法。
- 第3イメージング・システムの位置を、第3イメージング・システムの座標系から第1イメージング・システムの座標系に変換することをさらに含んで成る、請求項5に記載の方法。
- 解剖学的対象の第2画像を、第2イメージング・システムの座標系から第1イメージング・システムの座標系に変換することをさらに含んで成る、請求項6に記載の方法。
- 第3イメージング・システムの変換された位置および第1イメージング・システムの座標系における変換された第2画像に基づいて、第3イメージング・システムと解剖学的対象との間の距離を算出することをさらに含んで成る、請求項7に記載の方法。
- ステップ(b)で得られる測定距離を、第3イメージング・システムの座標系から第1イメージング・システムの座標系に変換することをさらに含んで成る、請求項8に記載の方法。
- 前記レジストレーションの誤差が、前記算出された距離から変換された測定距離のずれに基づいて決定される、請求項9に記載の方法。
- 前記レジストレーションの誤差と予め決められた閾値とを比較すること、および該比較に
基づいて、前記レジストレーションの妥当性を決定することをさらに含んで成る、請求項10に記載の方法。 - 第3イメージング・システムから送信され、また第3イメージング・システムによって受信される信号に基づいて、第3イメージング・システムと解剖学的対象との間の距離が測定される、請求項1に記載の方法。
- 第1イメージング・システムおよび第2イメージング・システムを用いて得られる内側解剖学的対象の画像のレジストレーションを検証するためのシステムであって、
解剖学的対象および第3イメージング・システムの少なくとも一部分の第1画像を得るための第1イメージング・システム、
解剖学的対象の第2画像を得るための第2イメージング・システム、ならびに
第1イメージング・システム、第2イメージング・システムおよび第3イメージング・システムと連通するコントローラを含んで成り、
コントローラが、
第3イメージング・システムと解剖学的対象との間の距離を測定するようになっており、
第1画像および第2画像を位置合せするようになっており、ならびに
(i)第1画像における第3イメージング・システムの少なくとも一部分および解剖学的対象の位置、ならびに(ii)前記測定された距離に基づいて、前記レジストレーションにおける誤差を算出するようになっている、システム。 - 第1イメージング・システム、第2イメージング・システムおよび第3イメージング・システムが、磁気共鳴イメージング(MRI)システム、コンピュータ・トポグラフィ(CT)システムおよび超音波トランスデューサ・システムをそれぞれ含んで成る、請求項13に記載のシステム。
- コントローラが、第3イメージング・システムの座標系における第3イメージング・システムの少なくとも一部分の位置を決定するようにさらに構成されている、請求項13に記載のシステム。
- コントローラが、飛行時間法に基づいて、第3イメージング・システムの座標系における第3イメージング・システムの少なくとも一部分の位置を決定するようにさらに構成されている、請求項15に記載のシステム。
- コントローラが、第1画像および第3イメージング・システムの座標系における第3イメージング・システムの少なくとも一部分の位置に基づいて、第1イメージング・システムの座標系および第3イメージング・システム座標系を関連付ける変換を算出するようにさらに構成されている、請求項15に記載のシステム。
- コントローラが、第3イメージング・システムの位置を、第3イメージング・システムの座標系から第1イメージング・システムの座標系に変換するようにさらに構成されている、請求項17に記載のシステム。
- コントローラが、解剖学的対象の第2画像を、第2イメージング・システムの座標系から第1イメージング・システムの座標系に変換するようにさらに構成されている、請求項18に記載のシステム。
- コントローラが、第1イメージング・システムの座標系における第3イメージング・システムの変換された位置および変換された第2画像に基づいて、第3イメージング・システムと解剖学的対象との間の距離を算出するようにさらに構成されている、請求項19に記載のシステム。
- コントローラが、ステップ(b)で得られる測定距離を、第3イメージング・システムの座標系から第1イメージング・システムの座標系に変換するようにさらに構成されている、請求項20に記載のシステム。
- コントローラが、前記算出された距離から変換された測定距離のずれに基づいて、前記レジストレーションの誤差を決定するようにさらに構成されている、請求項21に記載のシステム。
- コントローラが、前記レジストレーションの誤差と予め決められた閾値とを比較し、該比較に基づいて、該レジストレーションの妥当性を決定するようにさらに構成されている、請求項22に記載のシステム。
- コントローラが、第3イメージング・システムから送信され、また第3イメージング・システムによって受信される信号に基づいて、第3イメージング・システムと解剖学的対象との間の距離を測定するようにさらに構成されている、請求項13に記載のシステム。
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