JP2019022824A - リアルタイム超音波イメージングのトリプレーン画像の自動セグメント化 - Google Patents
リアルタイム超音波イメージングのトリプレーン画像の自動セグメント化 Download PDFInfo
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Abstract
Description
Claims (18)
- 心臓の複数の標準ビュープレーンを取得する超音波診断イメージングシステムであって、
心臓の3Dボリューム画像データを取得するマトリクスアレイプローブと、
幾何学的な心臓モデルのデータを有するメモリと、
前記3Dボリューム画像データ及び前記心臓モデルを自動的に位置合わせし、前記3Dボリューム画像データに基づいて前記心臓モデルの初期の向きを決定し、前記決定された初期の向きに基づいて前記心臓モデルを前記3Dボリューム画像データにフィットさせることにより、フィットされた心臓モデルを生成し、前記心臓モデルの重要なランドマークに基づいて決定される予め決められた複数のビュープレーンを前記心臓の3Dボリューム画像データから抽出するセグメント化及び追跡プロセッサであって、前記予め決められた複数のビュープレーンの各々の向きが前記フィットされた心臓モデルに対し決定される、セグメント化及び追跡プロセッサと、
前記セグメント化及び追跡プロセッサの出力に応じて、前記抽出された複数のビュープレーンの画像を表示する画像ディスプレイと、
を有し、前記セグメント化及び追跡プロセッサが更に、表示された画像の更新のために、前記心臓の連続する3Dボリューム画像データ内の解剖学的ランドマークの動きを解析することで前記複数のビュープレーンの動きを決定し、前記複数のビュープレーンの連続する画像の取得を追跡するように動作する、超音波診断イメージングシステム。 - 前記セグメント化及び追跡プロセッサは、マルチプレーンシステムとして前記複数のビュープレーンを追跡する、請求項1に記載の超音波診断イメージングシステム。
- 前記予め決められた複数のビュープレーンが、3つの画像プレーンを有し、前記セグメント化及び追跡プロセッサが、トリプレーンシステムとして前記3つの画像プレーンを追跡する、請求項2に記載の超音波診断イメージングシステム。
- 前記3つの画像プレーンは、AP4ビュープレーン、AP3ビュープレーン及びAP2ビュープレーンである、請求項3に記載の超音波診断イメージングシステム。
- 前記セグメント化及び追跡プロセッサは、剛体変換によって、前記予め決められた複数のビュープレーンを追跡する、請求項2に記載の超音波診断イメージングシステム。
- 前記予め決められた複数のビュープレーンが、3つの画像プレーンを有し、前記セグメント化及び追跡プロセッサが、トリプレーンシステムとして前記3つの画像プレーンを追跡する、請求項5に記載の超音波診断イメージングシステム。
- 前記セグメント化及び追跡プロセッサは、連続して取得される複数の3D心臓画像において前記予め決められた複数のビュープレーンを追跡する、請求項1に記載の超音波診断イメージングシステム。
- 前記セグメント化及び追跡プロセッサは、連続して取得される画像プレーンのスキャン方向を制御することによって前記予め決められた複数のビュープレーンを追跡する、請求項1に記載の超音波診断イメージングシステム。
- 前記セグメント化及び追跡プロセッサは更に、前記心臓の新しい3Dボリューム画像データが取得されるたびに、前記複数のビュープレーンの画像を更新するように動作する、請求項1に記載の超音波診断イメージングシステム。
- 心臓の複数の標準ビュープレーンを取得する方法であって、
マトリクスアレイプローブにより心臓の3Dボリューム画像データを取得するステップと、
前記心臓の3Dボリューム画像データを、メモリに記憶された幾何学的な心臓モデルのデータと位置合わせし、前記3Dボリューム画像データに基づいて前記心臓モデルの初期の向きを決定し、前記決定された初期の向きに基づいて前記心臓モデルを前記3Dボリューム画像データにフィットさせることにより、フィットされた心臓モデルを生成し、前記フィットされた心臓モデルの重要なランドマークに基づいて決定される予め決められた複数のビュープレーンを前記心臓の3Dボリューム画像データから抽出するステップであって、前記予め決められた複数のビュープレーンの各々の向きが前記フィットされた心臓モデルに対し決定される、ステップと、
画像ディスプレイ上に前記複数のビュープレーンの画像を表示するステップと、
表示された画像の更新のために、前記心臓の連続する3Dボリューム画像データ内の解剖学的ランドマークの動きを解析することで前記複数のビュープレーンの動きを決定し、前記複数のビュープレーンの連続する画像の取得を追跡するステップと、
を含む方法。 - 前記方法が、マルチプレーンシステムとして前記複数のビュープレーンを追跡することを更に含む、請求項10に記載の方法。
- 前記マルチプレーンシステムが剛体変換によって追跡される、請求項11に記載の方法。
- 連続して3Dボリューム画像データを取得するステップと、
連続して取得された3Dボリューム画像データにおいて前記複数のビュープレーンを追跡するステップと、
を更に含む、請求項10に記載の方法。 - 前記方法が、連続する取得間隔においてスキャンプレーンの方向をステアリングすることを更に含む、請求項10に記載の方法。
- 前記心臓の新しい3Dボリューム画像データが取得されるたびに、前記複数のビュープレーンの画像を更新するステップを更に含む、請求項14に記載の方法。
- 前記心臓モデルが、幾何学的な3D表面メッシュを有する、請求項1に記載の超音波診断イメージングシステム。
- 前記3D表面メッシュが、複数の三角形要素を有する、請求項16に記載の超音波診断イメージングシステム。
- 前記3つの画像プレーンのうち、第1及び第2のビュープレーンは90°の角度をなし、前記第2のビュープレーン及び第3のビュープレーンは135°の角度をなす、請求項3に記載の超音波診断イメージングシステム。
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