JP6259953B2 - せん断波を用いる測定に関する超音波システム及び方法 - Google Patents
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Description
となる。
であることを理論的に得た。
Claims (15)
- せん断波を用いて対象の関心領域の特性を測定する超音波システムであって、
それぞれが相互に異なる深度値を持つ前記関心領域における複数の焦点の各々に、せん断波を発生させるためのプッシュパルスを順次送信し、前記複数の焦点のそれぞれに隣接する超音波エコー信号を受信するよう構成される超音波プローブと、
前記受信された超音波エコー信号に基づき、前記生成されたせん断波が前記焦点で持つ特性を示す第1のパラメータを、複数の焦点の各々に関して得るよう構成されるせん断波検出器と、
前記複数の焦点における前記得られた第1のパラメータの関数として、前記関心領域の特性を示す第2のパラメータを推定するよう構成される特性推定器とを有する、超音波システム。 - 前記関心領域の特性が、前記関心領域の長手方向特性を含み、前記関心領域の長手方向特性は、前記プッシュパルスの伝搬方向に沿った関心領域の特性である、請求項1に記載の超音波システム。
- 前記焦点に関して得られた第1のパラメータが、前記生成されたせん断波が焦点で持つ強度を示す、請求項1に記載の超音波システム。
- 前記焦点に関する第1のパラメータが、前記焦点に隣接する追跡スポットにおける前記生成されたせん断波の変位から得られる、請求項1乃至3の任意の一項に記載の超音波システム。
- 前記第1のパラメータが、前記追跡スポットにおける前記生成されたせん断波のピーク変位から得られる、請求項4に記載の超音波システム。
- 前記特性推定器が、前記得られた第1のパラメータを用いて指数曲線を適合させることにより、前記関心領域の組織長手方向減衰特性を推定するよう構成される、請求項5に記載の超音波システム。
- インターフェースを更に有し、
前記インターフェースが、前記複数の焦点を示すための入力を受信するよう構成され、
前記特性推定器は更に、前記示された複数の焦点のそれぞれの焦点深度値に基づき、前記第2のパラメータを推定するよう構成される、請求項1乃至3の任意の一項に記載の超音波システム。 - 前記特性推定器が、前記得られた第1のパラメータ及びプッシュパルスの強度の関数として、前記第2のパラメータを推定するよう構成される、請求項1乃至3の任意の一項に記載の超音波システム。
- 前記プッシュパルスのビームプロファイルによりもたらされる前記プッシュパルスの初期音響強度の変動を、各プッシュパルスに関して推定するよう構成される強度変動推定器を更に有する、請求項8に記載の超音波システム。
- 前記超音波プローブが、各プッシュパルスに関して、前記推定された変動に基づき前記プッシュパルスの強度を調整するよう更に構成される、請求項9に記載の超音波システム。
- 前記特性推定器が、前記推定された変動に基づき前記第2のパラメータを推定するよう更に構成される、請求項9に記載の超音波システム。
- 前記せん断波検出器が、前記複数の焦点の各々に関して、前記焦点の深度における前記関心領域のせん断特性を示す第3のパラメータを推定し、前記推定された前記第3のパラメータに基づき前記第1のパラメータを調整するよう更に構成され、
前記特性推定器は、前記複数の焦点における前記調整された第1のパラメータの関数として、前記第2のパラメータを得るよう更に構成される、請求項1乃至3の任意の一項に記載の超音波システム。 - せん断波を用いて対象の関心領域の特性を測定する方法において、
それぞれが相互に異なる深度値を持つ前記関心領域における複数の焦点の各々に、せん断波を発生させるためのプッシュパルスを順次送信し、前記複数の焦点のそれぞれに隣接する超音波エコー信号を受信するステップと、
前記複数の焦点の各々に関して、前記受信された超音波エコー信号に基づき、前記生成されたせん断波が前記焦点において持つ特性を示す第1のパラメータを得るステップと、
前記複数の焦点における前記得られた第1のパラメータの関数として、前記関心領域の特性を示す第2のパラメータを推定するステップとを有する、方法。 - 前記第2のパラメータが、前記関心領域の長手方向特性を示し、前記関心領域の長手方向特性は、前記プッシュパルスの伝搬方向に沿った前記関心領域の特性である、請求項13に記載の方法。
- 実行されるときコンピュータに、複数のせん断波に基づき、対象における関心領域の特性を推定する方法を実行させるコンピュータプログラムであって、複数のせん断波の各々が、異なる深度の焦点にプッシュパルスを送信することにより生成され、前記方法が、
複数の焦点の各々に関して、前記複数の焦点のそれぞれに隣接して受信される超音波エコー信号に基づき、前記焦点において前記せん断波が持つ特性を示す第1のパラメータを得るステップと、
前記複数の焦点における前記得られた第1のパラメータの関数として、前記関心領域の特性を示す第2のパラメータを推定するステップとを有する、コンピュータプログラム。
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PCT/EP2016/068250 WO2017021341A1 (en) | 2015-08-03 | 2016-07-29 | Ultrasound system and method for measurement using shear wave |
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US11523774B2 (en) * | 2017-04-06 | 2022-12-13 | Siemens Medical Solutions Usa, Inc. | Tissue property estimation with ultrasound medical imaging |
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US20180310918A1 (en) * | 2017-04-27 | 2018-11-01 | Siemens Medical Solutions Usa, Inc. | Variable focus for shear wave imaging |
US11726195B2 (en) * | 2017-09-19 | 2023-08-15 | Koninklijke Philips N.V. | Ultrasound systems and methods for measuring acoustic attenuation coefficients |
CN111885965A (zh) * | 2018-03-21 | 2020-11-03 | 皇家飞利浦有限公司 | 用于三维中的剪切波成像的超声系统 |
WO2020037674A1 (zh) * | 2018-08-24 | 2020-02-27 | 深圳迈瑞生物医疗电子股份有限公司 | 一种超声成像装置和方法、超声弹性检测装置和方法 |
CN110742644B (zh) * | 2019-09-29 | 2022-07-08 | 深圳大学 | 弹性成像系统、弹性成像方法及存储介质 |
KR102617857B1 (ko) * | 2020-03-12 | 2023-12-22 | 지멘스 메디컬 솔루션즈 유에스에이, 인크. | 초음파 의료 이미징을 사용한 간 질환 활성도 추정 |
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US9244169B2 (en) | 2012-06-25 | 2016-01-26 | Siemens Medical Solutions Usa, Inc. | Measuring acoustic absorption or attenuation of ultrasound |
WO2014055410A1 (en) | 2012-10-01 | 2014-04-10 | Mayo Foundation For Medical Education And Research | Shear wave attenuation from k-space analysis system |
EP2833792B1 (en) | 2012-10-07 | 2024-06-12 | Mayo Foundation For Medical Education And Research | Method for shear wave elastography by transmitting ultrasound with subgroups of ultrasound transducer elements |
US10743814B2 (en) | 2013-03-15 | 2020-08-18 | Siemens Medical Solutions Usa, Inc. | Fat fraction estimation using ultrasound with shear wave propagation |
FR3017041B1 (fr) * | 2014-01-31 | 2016-03-04 | Centre Nat Rech Scient | Procede et dispositif ultrasonore de caracterisation des milieux mous anisotropes, et ensemble de sonde ultrasonore pour un tel dispositif de caracterisation |
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2016
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WO2017021341A1 (en) | 2017-02-09 |
EP3190976A1 (en) | 2017-07-19 |
JP2017535327A (ja) | 2017-11-30 |
US10729404B2 (en) | 2020-08-04 |
RU2641067C1 (ru) | 2018-01-15 |
EP3190976B1 (en) | 2018-03-14 |
CN107072639A (zh) | 2017-08-18 |
CN107072639B (zh) | 2019-03-08 |
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