JP2014528348A - 心臓内モーションを用いる動的イメージングモダリティーからの局所的心機能および同期不全の評価方法 - Google Patents
心臓内モーションを用いる動的イメージングモダリティーからの局所的心機能および同期不全の評価方法 Download PDFInfo
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Abstract
Description
を使用し、式中、k1およびk2は表面の主曲率である。
によって規定され、式中、k1およびk2はそのポイントでの主要な〔サインドマキシマムおよびミニマム(符号付き最大値および最小値)〕曲率である。図4は、異なる表面形状についてSI値を示す。鞍点について、k1=-k2であり;そして従って、SI=0である。球面について、k1=-k2≠0、そして曲率が負の場合SI=-1、そして曲率が正の場合+1で、それぞれ球形カップおよびキャップに対応する。バレーについて、k1=0、およびk2は任意の負の値を有することができ(定義k1≧k2により);それで、k2が非ゼロである限り、
Claims (28)
- 対象体の心臓での関心がある領域の機能の評価のための方法であって、
イメージングモダリティーを用いて対象体の心臓での関心がある領域についての画像シーケンスを取得すること、
ステップを実行するために構成されたプロセッサーに画像シーケンスを入力することを含み:
画像シーケンスの各画像についてのバイナリーボリュームを定めること、
対象体の心臓の関心がある領域についての心臓内境界を表す三角形メッシュを作り出すこと、
メッシュの局所的な幾何学的特性を記述する定量的マップを計算すること、
時間を通して局所的な特性を追跡して関心がある領域のディスプレースメントマップを得るために非剛体レジストレーションアルゴリズムにおける対象体の心臓での関心がある領域の座標と共に定量的マップを用いること、
対象体の心臓での関心がある領域上の個々のポイントのトラジェクトリーを計算して対応する三角形要素を有するメッシュを得るためにディスプレースメントマップを用いること、
対応する三角形要素のエリアの比の関数を計算すること、および
心機能の決定を行うこと
を含む、方法。 - さらに、対象体の心臓での関心がある領域の視覚化をもたらすことが含まれる、請求項1の方法。
- さらに、三次元ムービーおよび一連の二次元ブルズアイプロットからなる群より選ばれる一の形態を採用する視覚化が含まれる、請求項2の方法。
- イメージングモダリティーには、トモグラフィースキャナー、コンピュータートモグラフィースキャナー、磁気共鳴イメージングデバイス、または陽電子放出トモグラフィースキャナーからなる群より選ばれる一つが含まれる、請求項1の方法。
- イメージングモダリティーには、マルチビートセグメント化された再構成アルゴリズムを用いて、毎分最大でおよそ180ビートまでの心拍数でおよそ40ms乃至およそ75msの範囲内の時間分解能を有する画像の生成が可能なコンピュータートモグラフィースキャナーが含まれる、請求項1の方法。
- さらに、ディスプレースメントマップを用いて心臓内のひずみ、心臓のねじれ、および指向性のひずみの少なくとも一つを計算することが含まれる、請求項1の方法。
- さらに、安静およびストレス条件の双方の下で画像シーケンスを取得することが含まれる、請求項1の方法。
- さらに、運動によって誘導されるストレスが含まれる、請求項7の方法。
- さらに、薬物を用いて誘導されるストレスが含まれる、請求項7の方法。
- さらに、アルゴリズム
- さらに、
- 対象体の心臓での関心がある領域には、左心室が含まれる、請求項1の方法。
- 定量的マップには、形状インデックスが含まれる、請求項1の方法。
- 画像シーケンスにおける多数の三次元画像には、少なくとも二つの時間枠が含まれる、請求項1の方法。
- 対象体の心臓での関心がある領域の機能の評価のためのシステムであって、
対象体の心臓での関心がある領域についての画像シーケンスの取得用に構成されるイメージングモダリティー、
ステップを実行するために構成されるプロセッサー
を含み、
対象体の心臓での関心がある領域についての心臓内境界を表す三角形メッシュのための形状インデックス値を計算すること、
関心がある領域のディスプレースメントマップを得るためにモーション追跡アルゴリズムにおいて対象体の心臓での関心がある領域の座標と共に形状インデックス値を用いること、
対象体の心臓での関心がある領域上の個々のポイントのトラジェクトリーを計算して対応する三角形要素を有するメッシュを得るためにディスプレースメントマップを用いること、
対応する三角形要素のエリアの比の関数を計算すること、および
心機能の決定を行うこと
を含む、システム。 - さらに、対象体の心臓での関心がある領域の視覚化をもたらすために構成されるプロセッサーが含まれる、請求項15のシステム。
- さらに、三次元ムービーおよび一連の二次元ブルズアイプロットからなる群より選ばれる一の形態を採用する視覚化が含まれる、請求項16のシステム。
- イメージングモダリティーには、トモグラフィースキャナー、コンピュータートモグラフィースキャナー、磁気共鳴イメージングデバイス、または陽電子放出トモグラフィースキャナーからなる群より選ばれる一つが含まれる、請求項15のシステム。
- イメージングモダリティーには、マルチビートセグメント化された再構成アルゴリズムを用いて、毎分最大でおよそ180ビートまでの心拍数でおよそ40ms乃至およそ75msの範囲内の時間分解能を有する画像の生成が可能なコンピュータートモグラフィースキャナーが含まれる、請求項15のシステム。
- さらに、ディスプレースメントマップを用いて心臓内のひずみ、心臓のねじれ、および指向性のひずみの少なくとも一つを計算するために構成されるプロセッサーが含まれる、請求項15のシステム。
- さらに、安静およびストレス条件の双方の下で画像シーケンスを取得するために構成されるプロセッサーが含まれる、請求項15のシステム。
- さらに、運動によって誘導されるストレスが含まれる、請求項21のシステム。
- さらに、薬物を用いて誘導されるストレスが含まれる、請求項21のシステム。
- さらに、アルゴリズム
- さらに、
- 対象体の心臓での関心がある領域には、左心室が含まれる、請求項15のシステム。
- モーション追跡アルゴリズムには、コヒーレントポイントドリフト(CPD)アルゴリズムが含まれる、請求項15のシステム。
- 画像シーケンスにおける多数の三次元画像には、少なくとも2つの時間枠が含まれる、請求項15のシステム。
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