JP2016531630A - 心筋灌流の病理学的特性評価のためのシステム及び方法 - Google Patents
心筋灌流の病理学的特性評価のためのシステム及び方法 Download PDFInfo
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Abstract
Description
複数の医用画像における関心被験者の心臓の選択された部分の輪郭を描写し、選択された部分を複数のセグメントにセグメント化するステップと、
複数の医用画像から、選択された心筋像位置の強度をサンプリングし、心筋像位置の対応するサンプリングされた強度に、医用画像の各医用画像の取得の順序を表す指標を割当て、選択された心筋像位置のそれぞれに対し、強度曲線を得るステップと、
得られた強度曲線に基づいて、複数の心筋セグメントのうちの少なくとも心筋セグメントのサブセットのうち、時空間的灌流不均一性又は灌流脱位相を示す指数を計算するステップとを含む方法によって達成される。
複数の医用画像における関心被験者の心臓の選択された部分の輪郭を描写し、選択された部分を複数のセグメントにセグメント化する描写ユニットと、
強度サンプリング及び解析ユニットとを含む。
複数の医用画像から、心筋像位置の強度をサンプリングし、心筋像位置の対応するサンプリングされた強度に、複数の医用画像の各医用画像の取得の順序を表す指標を割当て、
複数の心筋セグメントのうちの少なくとも心筋セグメントのサブセットのうち、時空間的灌流不均一性又は灌流脱位相を示す指数を計算する。システムは、方法について上記された利点と同じ利点を提供できる。
12 磁気共鳴スキャナ
14 主磁石
16 検査空間
18 中心軸
20 関心被験者
22 磁場勾配コイルシステム
24 全身コイル
26 無線周波数シールド
28 制御ユニット
30 無線周波数送信器ユニット
32 無線周波数スイッチングユニット
34 画像処理ユニット
36 モニタユニット
38 心電図デバイス
40 電極
42 同期化ユニット
44 メモリユニット
46 プロセッサユニット
48 ソフトウェアモジュール
50 トリガ信号
52 心筋灌流の病理学的特性評価システム
54 描写ユニット
56 血流アナライザ
58 強度サンプリング及び解析ユニット
60 経時的な強度曲線
62 灌流図
64 第1の指数
66 第2の指数
AIF 動脈入力関数
LV 左心室
TTPI ピーク強度までの時間
Claims (15)
- 関心被験者の心臓の少なくとも一部の複数の医用画像を解析することによって、心筋灌流病変の特性評価をする方法であって、前記複数の医用画像は、医用イメージングモダリティによって連続的に取得され、当該方法は、
前記複数の医用画像における前記関心被験者の前記心臓の選択された部分の輪郭を描写し、選択された前記部分を複数のセグメントにセグメント化するステップと、
前記複数の医用画像から、選択された心筋像位置の強度をサンプリングし、前記心筋像位置の対応するサンプリングされた強度に、前記複数の医用画像の各医用画像の取得の順序を表す指標を割当て、選択された前記心筋像位置のそれぞれに対し、強度曲線を得るステップと、
得られた前記強度曲線に基づいて、前記複数の心筋セグメントのうちの少なくとも心筋セグメントのサブセットのうち、時空間的灌流不均一性又は灌流脱位相を示す指数を計算するステップと、
を含む、方法。 - 前記複数のセグメントの各セグメントにおける心筋血流の定量化を行うステップを更に含む、請求項1に記載の方法。
- 前記複数の医用画像は、前記関心被験者に造影剤を投与した後に、前記医用イメージングモダリティによって取得される、請求項1又は2に記載の方法。
- 前記心臓の選択された前記部分における基準場所を特定するステップを更に含み、前記指数を計算する前記ステップにおいて、前記強度曲線は、特定された前記基準場所によって決定される基準時間を参照して評価される、請求項1乃至3の何れか一項に記載の方法。
- 選択された前記心筋位置のそれぞれについて、前記心筋像位置のそれぞれのサンプリングされた強度の特徴の発生まで、特定された前記基準場所によって決定される基準時間に対する個々の期間を自動的に決定するステップを更に含み、
前記個々の期間は、前記指数を計算する前記ステップにおいて使用される、請求項4に記載の方法。 - 前記指数を計算する前記ステップは、特定された前記基準場所における前記特徴の発生の時間に対する個々の前記心筋位置のそれぞれにおける特徴の発生までの時間の変動を示す統計的尺度の計算を含む、請求項4又は5に記載の方法。
- 前記関心被験者の前記心臓の少なくとも一部の前記複数の医用画像を取得することは、前記関心被験者の前記心臓の周期動作と少なくとも部分的に同期される、請求項1乃至6の何れか一項に記載の方法。
- 心筋像位置の強度をサンプリングする前記ステップにおいて、前記心筋像位置は、心筋と平行な方向及び前記心筋を横断する方向において選択される、請求項1乃至7の何れか一項に記載の方法。
- 灌流図を生成し、前記灌流図をユーザに表示するステップを更に含む、請求項1乃至8の何れか一項に記載の方法。
- 少なくとも1つの特徴位置及び/又は少なくとも1つの特徴時点を示す少なくとも1つのマーカーを前記灌流図内に組み込むステップを更に含む、請求項1乃至9の何れか一項に記載の方法。
- 複数のコンピュータリンクを組み込むステップを更に含み、前記複数のコンピュータリンクの各コンピュータリンクは、前記灌流図内のある場所に割当てられ、前記複数のコンピュータリンクの各コンピュータリンクは、前記複数の医用画像の1つの医用画像を表すデータセットにリンク付けされる、請求項1乃至10の何れか一項に記載の方法。
- 関心被験者の心臓の少なくとも一部の複数の医用画像を解析することによって、心筋灌流病変の特性評価をするシステムであって、前記複数の医用画像は、医用イメージングモダリティによって連続的に取得され、当該システムは、
前記複数の医用画像における前記関心被験者の前記心臓の選択された部分の輪郭を描写し、選択された前記部分を複数のセグメントにセグメント化する描写ユニットと、
前記複数の医用画像から、心筋像位置の強度をサンプリングし、前記心筋像位置の対応するサンプリングされた強度に、前記複数の医用画像の各医用画像の取得の順序を表す指標を割当て、前記複数の心筋セグメントのうちの少なくとも心筋セグメントのサブセットのうち、時空間的灌流不均一性又は灌流脱位相を示す指数を計算する強度サンプリング及び解析ユニットと、
を含む、システム。 - 請求項12に記載のシステムを含む、医用イメージングモダリティ。
- 磁気共鳴イメージング装置としてデザインされる、請求項13に記載の医用イメージングモダリティ。
- 請求項1乃至11の何れか一項に記載される心筋灌流病変の特性評価する方法を実行するためのソフトウェアモジュールであって、行われるべき前記方法のステップは、前記ソフトウェアモジュールのプログラムコードに変換され、前記プログラムコードは、前記医用イメージングモダリティの制御ユニットのメモリユニットに実装可能であり、前記医用イメージングモダリティの前記制御ユニットのプロセッサユニットによって実行可能である、ソフトウェアモジュール。
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