JP2009056326A - 直接検出できない内視鏡検査における自動分析 - Google Patents
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Abstract
【解決手段】三次元組織に関連する少なくとも一つの物性を示す一連の二次元画像から三次元ボリュームデータを作成し、コンピュータにより、選択された関心領域を示す物性の所定値に基づいてボリュームデータから該関心領域の等表面を作成し、コンピュータにより複数の頂点よりなる等表面のワイヤフレームモデルを作成し、ワイヤフレームモデルの頂点は次いでコンピュータにより異常壁組織を示す特性を有する隣接頂点の個体群にグループ分けされ、ワイヤフレームモデルは次いでコンピュータによりインタラクティブな三次元ディスプレイに表現され、異常壁組織個体群を表示する。
【選択図】図1−1
Description
Claims (23)
- 内腔または管腔を有する組織を三次元で表現してインタラクティブに描画し、当該組織の異常壁厚領域を表示するため、コンピュータにより実行される方法であって、
a.前記コンピュータが、三次元の組織に関する少なくとも一つの物理的特性を示す一連の二次元画像から三次元ボリュームデータを形成する工程と、
b.前記コンピュータが、選択された関心領域を示している物理的特性の所定値に基づいて、前記ボリュームデータから当該関心領域における等値面を作成する工程と、
c.前記コンピュータが、前記等値面のワイヤフレームモデルを生成する工程であって、当該ワイヤフレームモデルは複数の頂点を有するものである、前記生成する工程と、
d.前記コンピュータが、異常壁組織を示す特性を有する前記ワイヤフレームモデルの頂点を個体群に分類させる工程と、
e.前記コンピュータが、前記ワイヤフレームモデルをインタラクティブな三次元ディスプレイ上に描画して前記個体群を表示する工程と
を有することを特徴とする方法。 - 前記ワイヤフレームモデルの頂点を異常壁組織を示す特性を有する個体群に分類させる工程は、
a.前記コンピュータが、各頂点位置について法線ベクトルを特定する工程と、
b.前記コンピュータが、各頂点について前記法線ベクトルの夫々に関連する壁厚値を特定する工程と、
c.前記コンピュータが、前記各頂点についての隣接頂点の連結行列を特定する工程と、
d.前記コンピュータが、異常壁厚を示す特性を有する前記隣接頂点を個々の異常壁厚個体群に分類させる工程と
を有することを特徴とする請求項1記載の方法。 - 前記連結行列を特定する工程は、前記コンピュータが、局部的な幾何学連続性情報を用いて連結行列を順序づけし直す工程を有することを特徴とする請求項2記載の方法。
- 前記コンピュータが、各個体群を所定の形状的特徴に従って分析する工程をさらに有することを特徴とする請求項1記載の方法。
- 前記各個体群を形状的特徴に従って分析する工程は、前記コンピュータが、前記各個体群について湾曲の大きさと方向とを示す凸面度を特定する工程を有することを特徴とする請求項4の方法。
- 前記各個体群を形状的特徴にしたがって分析する工程は、前記コンピュータが、前記各個体群について曲率を特定する工程を有することを特徴とする請求項4の方法。
- 前記描画して表示する工程は、前記コンピュータが、前記内腔または管腔を有する組織を縦切りの断面で分割する工程と、この断層組織を表示する工程とを含み、これにより前記断層組織の内表面を見ることができることを特徴とする請求項1記載の方法。
- 前記描画して表示する工程は、前記コンピュータが、前記組織の内腔または管腔の中心を通る中心線に沿って移動するようにシミュレートする工程を含むことを特徴とする請求項1記載の方法。
- 前記コンピュータが、前記インタラクティブな三次元ディスプレイの表層描写画像内に位置する点を中心として前記インタラクティブな三次元ディスプレイのボリューム描写画像を表示する工程をさらに有することを特徴とする請求項1記載の方法。
- 前記インタラクティブな三次元ディスプレイのボリューム描写画像を表示する工程は、前記コンピュータが、前記インタラクティブな三次元ディスプレイの表層描写画像内に位置する第2の点を通る少なくとも1つの平面像を表示する工程を含むことを特徴とする請求項10記載の方法。
- 前記コンピュータが、前記複数の頂点の連続性に関する情報を含む連結行列を生成する工程と、局部的な幾何学的連続性情報を用いて前記連結行列を順序づけし直す工程とをさらに有することを特徴とする請求項1記載の方法。
- 前記コンピュータが、前記選択された関心領域の任意の切断面における断面積を特定する工程をさらに有することを特徴とする請求項11記載の方法。
- 前記コンピュータが、前記異常壁組織を示す特性を有する前記ワイヤフレームモデルの頂点を個体群に分類させる工程とをさらに有することを特徴とする請求項1記載の方法。
- 前記頂点を個体群に分類させる工程は、
a.前記コンピュータが、各頂点位置について法線ベクトルを特定する工程と、
b.前記コンピュータが、各頂点について前記法線ベクトルの夫々に関連する壁厚値を特定する工程と
c.前記コンピュータが、前記各頂点についての隣接頂点の連結行列を特定する工程と、
d.前記コンピュータが、異常壁厚を示す特性を有する前記隣接頂点を個々の異常壁厚個体群に分類させる工程と
を有することを特徴とする請求項13記載の方法。 - 前記連結行列を特定する工程は、前記コンピュータが、局部的な幾何学連続性情報を用いて連結行列を順序づけし直す工程を有することを特徴とする請求項14記載の方法。
- 前記コンピュータが、各個体群を所定の形状的特徴にしたがって分析する工程をさらに有することを特徴とする請求項13記載の方法。
- 前記各個体群を形状的特徴にしたがって分析する工程は、前記コンピュータが、前記各個体群について湾曲の大きさと方向とを示す凸面度を特定する工程を有することを特徴とする請求項16の方法。
- 前記各個体群を形状的特徴に従って分析する工程は、前記コンピュータが、前記各個体群についての湾曲を特定する工程を有する請求項16記載の方法。
- 内腔または管腔を有する組織を三次元で表現してインタラクティブに描画し、当該組織の異常壁厚領域を表示するためのシステムであって、
a.三次元の組織に関する少なくとも一つの物理的特性を示す一連の二次元画像から三次元ボリュームデータを形成するボリューム形成手段と、
b.選択された関心領域を示している前記物理的特性の所定値に基づいて、前記ボリュームデータから当該関心領域における等値面を作成する等表面作成手段と、
c.前記等値面のワイヤフレームモデルを作成する手段であって、当該ワイヤフレームモデルは複数の頂点より構成されるものである、前記ワイヤフレームモデル作成手段と、
d.異常壁組織を有する前記ワイヤフレームモデルの頂点を個体群に分類する頂点分類手段と、
e.前記ワイヤフレームモデルをインタラクティブな三次元ディスプレイ上に描画する描画手段と、
を有してなることを特徴とするシステム。 - 前記描画手段は、前記内腔または管腔を有する組織を縦切りの断面で分割する手段と、この断層組織を表示する手段とを含み、これにより前記断層組織の内表面を見ることができることを特徴とする請求項19記載のシステム。
- 前記描画手段は、前記組織の内腔または管腔の中心を通る中心線に沿って移動するようにシミュレートする手段を含むことを特徴とする請求項19記載のシステム。
- 前記インタラクティブな三次元ディスプレイの表層描写画像内に位置する点を中心として前記インタラクティブな三次元ディスプレイのボリューム描写画像を表示する手段をさらに有することを特徴とする請求項19記載のシステム。
- 前記表示する手段は、前記インタラクティブな三次元ディスプレイの表層描写画像内に位置する第2の点を通る少なくとも1つの平面像を表示する手段を含むことを特徴とする請求項22記載のシステム。
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US08/805,584 US5920319A (en) | 1994-10-27 | 1997-02-25 | Automatic analysis in virtual endoscopy |
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JP2008283809A Expired - Fee Related JP4359647B2 (ja) | 1997-02-25 | 2008-11-05 | 直接検出できない内視鏡検査における自動分析 |
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EP (1) | EP0961993B1 (ja) |
JP (2) | JP4257867B2 (ja) |
AT (1) | ATE289104T1 (ja) |
CA (1) | CA2278672C (ja) |
DE (1) | DE69828954D1 (ja) |
WO (1) | WO1998037517A1 (ja) |
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US20070276228A1 (en) | 2007-11-29 |
JP4257867B2 (ja) | 2009-04-22 |
CA2278672C (en) | 2008-01-29 |
JP4359647B2 (ja) | 2009-11-04 |
US7853310B2 (en) | 2010-12-14 |
JP2001513923A (ja) | 2001-09-04 |
DE69828954D1 (de) | 2005-03-17 |
ATE289104T1 (de) | 2005-02-15 |
EP0961993A1 (en) | 1999-12-08 |
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US20110118596A1 (en) | 2011-05-19 |
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US20020193687A1 (en) | 2002-12-19 |
CA2278672A1 (en) | 1998-08-27 |
US6366800B1 (en) | 2002-04-02 |
EP0961993A4 (en) | 2003-02-12 |
US5920319A (en) | 1999-07-06 |
WO1998037517A1 (en) | 1998-08-27 |
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