JP6537981B2 - 複数の三次元ビューからの大きな対象のセグメンテーション - Google Patents
複数の三次元ビューからの大きな対象のセグメンテーション Download PDFInfo
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Description
は、前記初期形状を平行移動、回転又はスケーリングすることができる大域変換である。
と恒等関数との間のノルムである。前記対象形状が、以前の前記形状から外れすぎるべきではないので、前記変形の振幅は、不利にされる。この第2の項が、前記対象の位置及び向きとは独立であり、これが前記変換の分解の目的であったことが、強調されるべきである。このようなエネルギの最小化は、
及び
の両方に同時に勾配降下を使用して実行される。
で示される)は、剛体であることができ、すなわち、これは、同じサイズでのみ、位置及び向きの大域的変化を可能にする。変換
は、計算効率の損失なしで、例えば体積変化を考慮に入れるように、いかなるアフィン変換にセットされることもできる。前記エネルギは、この場合、
になる。
、
及び
に対して同時に勾配降下により実行される。最後に、関数
のゼロレベルセットとしてのセグメンテーションは、前記2つの画像の情報を使用したので、より正確である。更に、前記画像を互いに対して位置合わせすることを可能にする変換
の推定が、達成される。
Claims (15)
- 体積内の対象を検査する超音波撮像システムにおいて、
三次元超音波画像を取得し、三次元超音波画像データを提供する超音波画像取得プローブであって、前記超音波画像取得プローブの位置を追跡し、前記三次元超音波画像の視点位置を提供する追跡装置を有する、超音波画像取得プローブと、
前記三次元超音波画像データを受信し、表示データを提供する画像プロセッサであって、複数の三次元超音波画像及びそれぞれの視点位置を受信し、前記複数の三次元超音波画像を同時に使用して前記対象のセグメンテーションを行う、画像プロセッサと、
を有する、超音波撮像システム。 - 前記プロセッサは、前記対象の形状を表す初期幾何形状を変形することにより前記セグメンテーションを行い、前記初期幾何形状を変形する変換は、前記変形された形状が前記超音波画像内の前記対象の境界にマッチするように領域競合エネルギを最小化することにより決定される、請求項1に記載の超音波撮像システム。
- 前記エネルギが、第1の三次元超音波画像を表す第1の項及び他の三次元超音波画像を表す少なくとも1つの他の項を有し、前記変形された初期幾何形状が、前記第1の項及び前記少なくとも1つの他の項の両方において同じであり、前記第1の項及び前記少なくとも1つの他の項の少なくとも1つが、各々、前記第1の三次元超音波画像及び前記他の三次元超音波画像を位置合わせする位置合わせ変換を含むか、又はデータ忠実度項が、各々、前記三次元超音波画像及び前記少なくとも1つの三次元超音波画像を位置合わせする位置合わせ変換を含む、請求項2に記載の超音波撮像システム。
- 前記初期幾何形状の変形が、大域変換及び非剛体局所変換を前記初期幾何形状に適用することにより行われ、前記非剛体局所変換が、前記初期幾何形状に対して変位場を適用する、請求項3に記載の超音波撮像システム。
- 前記画像プロセッサが、前記超音波撮像システムとは異なるモダリティにより取得された三次元画像データにおける前記対象のセグメンテーションに基づいて前記初期幾何形状を決定する、請求項2に記載の超音波撮像システム。
- 前記画像プロセッサが、ユーザによる定義として前記初期幾何形状を受信する、請求項2に記載の超音波撮像システム。
- 前記画像プロセッサが、各三次元超音波画像を共通の基準に位置合わせする前記位置合わせ変換を決定する、請求項3に記載の超音波撮像システム。
- 前記画像プロセッサが、位置合わせ検索空間の初期化に基づいて前記セグメンテーションを行い、前記位置合わせ検索空間の初期化は、前記超音波画像内の前記対象の境界にマッチするように前記対象の形状を表す初期幾何形状を配置する三次元平行移動変換を決定することにより行われる、請求項1に記載の超音波撮像システム。
- 前記三次元平行移動変換が、それぞれの三次元画像を取得したときの前記超音波画像取得プローブの視点位置を使用した三次元平行移動変換であり、前記三次元平行移動変換を決定することにより、前記追跡装置により追跡される前記画像取得プローブの三次元向きの較正が、行われる、請求項8に記載の超音波撮像システム。
- 前記超音波撮像システムが、前記超音波画像取得プローブにより取得された他の複数の三次元超音波画像及び前記行われた位置合わせ検索空間の初期化を使用して前記セグメンテーション及び前記位置合わせ変換の決定を行う、請求項8に記載の超音波撮像システム。
- 前記追跡装置が、電磁追跡装置である、請求項1に記載の超音波撮像システム。
- 体積内の対象の超音波画像を提供する方法において、
複数の三次元超音波画像及び各三次元超音波画像の視点位置を有する前記体積の超音波画像データを提供するステップと、
セグメント化及び位置合わせされた超音波画像データを提供するように第1の超音波画像及び少なくとも1つの他の超音波画像から前記対象を同時にセグメント化及び位置合わせするように前記超音波画像データを処理するステップと、
前記セグメント化及び位置合わせされた超音波画像データに基づいて超音波画像を表示するステップと、
を有する、方法。 - 前記方法が、前記超音波画像データを提供するステップの前に前記超音波画像を提供する超音波撮像システムとは異なるモダリティを使用して取得された前記対象の三次元画像を入力するステップを有する、請求項12に記載の方法。
- 前記方法が、前記超音波撮像システムの画像取得プローブを既知の軸上の少なくとも2つの異なる場所に移動することにより、又は既知の軸に対する所定の関係の方向に前記プローブを向けることにより前記視点位置を取得する追跡装置を構成するステップを有する、請求項13に記載の方法。
- コンピュータ上で実行される場合に請求項12に記載の方法のステップを前記コンピュータに実行させるプログラムコード手段を有する、コンピュータプログラム。
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Application Number | Priority Date | Filing Date | Title |
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EP13305228.2 | 2013-02-28 | ||
EP13305228 | 2013-02-28 | ||
PCT/IB2014/059286 WO2014132209A1 (en) | 2013-02-28 | 2014-02-27 | Segmentation of large objects from multiple three-dimensional views |
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JP2016508406A JP2016508406A (ja) | 2016-03-22 |
JP6537981B2 true JP6537981B2 (ja) | 2019-07-03 |
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US (1) | US10631829B2 (ja) |
EP (1) | EP2961322B1 (ja) |
JP (1) | JP6537981B2 (ja) |
CN (1) | CN105025803B (ja) |
BR (1) | BR112015020425B1 (ja) |
RU (1) | RU2663649C2 (ja) |
WO (1) | WO2014132209A1 (ja) |
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EP3108456B1 (en) * | 2014-02-19 | 2020-06-24 | Koninklijke Philips N.V. | Motion adaptive visualization in medical 4d imaging |
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