JP2022503946A - 学習非線形マッピングに基づく画像再構成方法 - Google Patents
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Abstract
【選択図】図2
Description
Bモードイメージング
スキャン変換
カラードップラー画像
ベクトルフローイメージング
エラストグラフィ
高周波データを用いたBモードイメージングでは、再構成されたデータ(すなわち画像)に対してエンベロープ検出が行われる。エンベロープ検出は、例えば、ヒルベルト変換の後にマグニチュード検出を行い、オプションでローパスフィルタリングを行うことで実現できる。また、信号を2乗してローパスフィルタリングすることでも実現できる。IQデータを用いたBモードイメージングの場合、複素信号の大きさが抽出される。エンベロープ検出ステップの後、ゲイン調整とダイナミクス圧縮ステップが行われる。ドップラーやエラストグラフィの場合は、後処理を行わずに、再構成された高周波データまたはIQデータ(つまり画像)を直接使用する。
Claims (15)
- 対象物から測定値yとして1セットの波形を受信する受信ステップと、
前記対象物の未知画像xと前記測定値yとを結びつける測定モデルH(x)を定義する定義ステップと、
前記測定モデルH(x)と前記測定値yとの間の距離を測定するデータ忠実度汎函数D(x)を決定する決定ステップと、
入力データに関して非線形な、学習非線形マッピングfθを用いて、前記未知画像に関する事前情報を含む正則化汎函数R(x)を決定する第2決定ステップと、
前記未知画像の第1画像推定値x^を得るために、前記データ忠実度汎函数Dと正則化汎函数Rとを含む最適化問題を定義する定義ステップと、
前記最適化問題を解いて、前記第1画像推定値x^を算出する算出ステップと、
を備えた画像再構成方法。 - 前記データ忠実度汎函数D(x)および正則化汎函数R(x)を定義する前に、トレーニングデータセットを用いて前記非線形マッピングをトレーニングするステップをさらに含む請求項1に記載の画像再構成方法。
- 前記トレーニングデータセットは、実験または数値シミュレーションによって取得された画像を含む請求項2に記載の画像再構成方法。
- 前記学習非線形マッピングは、学習済みの人工ニューラルネットワークである請求項1~3のいずれか1項に記載の画像再構成方法。
- 前記最適化問題は、x^=argminx∈RN{D(x)+λR(x)}で表され、λ∈R+は、正則化汎函数Rの重み付けとなる正則化パラメータである請求項1~4のいずれか1項に記載の画像再構成方法。
- 前記データ忠実度汎函数D(x)および前記正則化汎函数R(x)の少なくともいずれか一方が、凸性、非凸性、微分可能性および非微分可能性のうちの少なくとも1つの特性を有する請求項1~5のいずれか1項に記載の画像再構成方法。
- 反復アルゴリズムを実行することにより前記最適化問題を解く請求項1~6のいずれか1項に記載の画像再構成方法。
- 前記反復アルゴリズムは、勾配降下法またはジェネリック・プロジェクション・ベース法である請求項7に記載の画像再構成方法。
- 前記反復アルゴリズムの反復ステップサイズを1に設定する反復ステップサイズ設定ステップと、
初期パラメータをゼロに設定する初期パラメータ設定ステップと、
前記反復アルゴリズムとして1回の反復のみを盛り込むステップと、
前記対象物の第1画像推定値x^を得るために、前記学習非線形マッピングを第2画像推定値x~に直接適用するステップと、
をさらに含み、
前記第2画像推定値x~は、前記第1画像推定値x^よりも画像アーチファクトの点で低品質である請求項7または8に記載の画像再構成方法。 - 前記反復アルゴリズムの1つの反復ステップから他の反復ステップへと前記学習非線形マッピングが変化する請求項7~9のいずれか1項に記載の画像再構成方法。
- 前記対象物に前記1セットの波形を送信するステップをさらに含む請求項7または8に記載の画像再構成方法。
- 送信される前記波形の数は、1以上5以下、1以上3以下、または1である請求項7または8に記載の画像再構成方法。
- 前記画像再構成法は超音波画像再構成法であること請求項1~12のいずれか1項に記載の画像再構成方法。
- 前記正則化汎函数R(x)は、以下のいずれかである請求項1~13のいずれか1項に記載の画像再構成方法。
R(x)=1/2xT[x-fθ(x)];
R(x)=1/2||x-fθ(x)||2 2;
R(x)=1/2||rθ(x)||2 2、(ここで、rθ:RN→RNは、xに適用される負のノイズを予測するように学習された学習非線形マッピング)
R(x)=1/2||eθe(x)||2 2(ここでeθeは学習可能なパラメータθeを持つエンコーダ) - 対象物からの測定値yとして、一連の波形を受信する受信部と、
対象物の未知画像xと測定値を結びつける測定モデルH(x)を定義する第1定義部と、
前記測定モデルH(x)とyとの間の距離を測定してデータ忠実度汎函数D(x)を決定する決定部と、
入力データに関して非線形な、学習非線形マッピングfθを用いて、前記未知画像xに関する事前情報を含む正則化汎函数R(x)を決定する第2決定部と、
前記未知画像の第1画像推定値x^を得るために、前記データ忠実度汎函数D(x)と正則化汎函数R(x)とを含む最適化問題を定義する第2定義部と、
前記最適化問題を解き、前記第1画像推定値x^を算出する算出部と、
を備えた画像再構成装置。
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US11933765B2 (en) * | 2021-02-05 | 2024-03-19 | Evident Canada, Inc. | Ultrasound inspection techniques for detecting a flaw in a test object |
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Citations (1)
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WO2018099881A1 (en) * | 2016-11-30 | 2018-06-07 | Koninklijke Philips N.V. | Bone and hard plaque segmentation in spectral ct |
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---|
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