JP2017533773A - 組織特性を視覚化する装置 - Google Patents
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Abstract
Description
に従って、プロセッサによりMモード超音波信号を処理することに基づいて、レンダリングされることができ、ここで、Φは、Mモード超音波測定からの2つの連続的な高周波ラインの間の局所的位相シフトであり、cは、組織内の音速であり、fpは、超音波測定のパルス反復率であり、fcは、超音波トランスデューサの中心周波数である。エイリアシングは、超音波測定のパルス反復率を十分に高いレートに増大させ、好適には4kHzより高くすることによって、回避される。
に従って、プロセッサによりMモード超音波信号を処理することに基づいてレンダリングされることができ、fsは、データサンプルレートであり、nは、ΔΦ=Φn−Φn−1における離散時間インデックスである。或る組織の最も重要な特性は、組織収縮、組織弾性及び血液灌流である。このような特性を反映することができる物理量は、組織速度及びひずみレートである。組織の特性又は外部刺激による特性変更を標示するために、組織速度又はひずみレート値の振幅としての1次元表現は、2次元Mモード画像に対する大きな改善であり、これらの値の振幅は、ピクセルのカラー強度として表現され、振幅が大きいほど、ピクセルは明るくなる。人間の眼は、画像の領域の輝度を定量的に評価する難しさのため、2次元Mモード画像における輝度差を検出するようにはあまり良好に適応されず、隣の領域の輝度によって容易に誤り導かれる。更に、2次元画像上に、超音波測定信号又は導出された組織速度及びひずみレート値を表現するためには、付加の処理ステップ(例えばフィルタリング、ダウンスケール)が必要になり、これは結果的に、潜在的に重要な情報の損失をもたらす。2次元表現のためのカラーマップにおいて使用されるカラーは、個人間の知覚の差を増やし、かかる知覚の差は、1次元表現によって除去される。
Claims (14)
- 組織の特性を変えるよう組織にエネルギーを印加するエネルギー印加装置に接続されたエネルギー源と、
超音波測定器と、
装置と、
を有するシステムであって、前記システムは、超音波測定から導出されるひずみレート値の平均及びバリエーションの検出される変化に応じて、前記エネルギー源から前記エネルギー印加装置へのエネルギーの送信を中断するように構成される、システム。 - 前記装置が、
超音波に曝露された組織から生じる動きモード超音波測定信号を処理する信号プロセッサと、
前記信号プロセッサに結合され、時間軸に沿って1次元表現をレンダリングするレンダリング装置と、
を有し、前記1次元表現の値が、選択可能な観測ウィンドウ内の測定値に基づいて導出される前記組織内のひずみレートを示し、前記観測ウィンドウが、前記組織内の空間方向における距離レンジ及び時間方向における時間間隔によって規定され、
前記装置が、動きモード超音波画像、組織速度画像、又はひずみレート画像に基づいて前記観測ウィンドウを選択し、前記装置が、時間軸に沿って前記観測ウィンドウをシフトする、請求項1に記載のシステム。 - 前記装置は、生物の心臓の運動を視覚化するように動作可能である、請求項2に記載のシステム。
- 前記時間方向において前記観測ウィンドウを規定する時間間隔は、生物の心臓の2つの連続する心拍の間の時間間隔より短い、請求項3に記載のシステム。
- 心臓の電気活動を測定する測定ユニットを更に有する、請求項3に記載のシステム。
- 前記装置は、前記1次元表現の値の表現を、心臓のエレクトログラム又は心電図と同期させる、請求項5に記載のシステム。
- 前記装置は、前記心臓の前記エレクトログラム及び/又は表面心電図の1次元表現と共に、ひずみレート値の1次元表現を、組み合わされた画像にレンダリングする、請求項6に記載のシステム。
- 前記動きモード超音波測定の空間方向が、複数の観測ウィンドウを有し、
前記信号プロセッサに結合される前記レンダリング装置が、前記複数の観測ウィンドウの各々について、時間軸に沿って1次元表現をレンダリングする、請求項2に記載のシステム。 - 連続する前記複数の観測ウィンドウが、空間方向において部分的に重複する、請求項8に記載のシステム。
- 前記信号プロセッサに結合される前記レンダリング装置が、時間軸に沿って複数の1次元表現を含む合成画像をレンダリングするよう動作可能であり、前記合成画像内の各1次元表現の位置が、ひずみレート画像、動きモード超音波画像又は組織速度画像内の個々の観測ウィンドウの連続する位置に従い、各1次元表現は、個々の観測ウィンドウから生成される、請求項8に記載のシステム。
- 前記エネルギー印加装置は、超音波、高周波電流、高周波、マイクロ波、又はレーザ放射から選択されるモダリティのうちの1つによってエネルギーを組織に印加する、請求項1に記載のシステム。
- 前記エネルギー印加装置へのエネルギー送信の中断は、10乃至30パーセントのレンジの前記検出される変化に応じる、請求項1に記載のシステム。
- 前記超音波測定器の超音波トランスデューサが、前記エネルギー印加装置の前記遠位先端部に組み込まれている、請求項1に記載のシステム。
- 電気信号測定電極が、前記エネルギー印加装置の前記遠位先端部に組み込まれている、請求項13に記載のシステム。
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US10507009B2 (en) | 2017-10-05 | 2019-12-17 | EchoNous, Inc. | System and method for fusing ultrasound with additional signals |
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WO2020079240A1 (en) | 2018-10-19 | 2020-04-23 | Koninklijke Philips N.V. | System for ascertaining a velocity within tissue and use thereof in tissue treatment |
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CN106999159B (zh) | 2020-08-14 |
CN106999159A (zh) | 2017-08-01 |
JP7127986B2 (ja) | 2022-08-30 |
WO2016078992A1 (en) | 2016-05-26 |
US20170332997A1 (en) | 2017-11-23 |
EP3220830B1 (en) | 2019-05-15 |
US11419575B2 (en) | 2022-08-23 |
US20220395252A1 (en) | 2022-12-15 |
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