JP2016521625A - 弾性イメージングのための音響放射力クリープ−リカバリーおよびせん断波伝搬のためのシステムおよび方法 - Google Patents
弾性イメージングのための音響放射力クリープ−リカバリーおよびせん断波伝搬のためのシステムおよび方法 Download PDFInfo
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Abstract
Description
この発明は、米国国立衛生研究所によって与えられたEB002640、EB002167、およびDK082408に従う政府の支持とともになされた。政府は、本発明において、一定の権利を有する。
Claims (13)
- 超音波システムを使用して粘弾性の組織特性測定基準を作成するための方法であって、
a)クリープ期間の間、超音波システムを使用して、少なくとも1つのクリープ応答を発生させる機械的応力を組織に加えるステップと、
b)前記クリープ期間に続くリカバリー期間の間、前記加えられた機械的応力に起因する組織の変位を測定するステップと、
c)前記測定された組織の変位から関連複素係数の値を抽出するステップと、
d)前記抽出された複素係数から損失タンジェントを算出するステップと、
e)前記算出された損失タンジェントに基づいて粘弾性の組織特性測定基準を算出するステップと、
を備える方法。 - 前記機械的応力は、前記クリープ応答が定常状態に達する前に終了させる、請求項1に記載の方法。
- 前記機械的応力は、単一の超音波の押圧パルスを備える、請求項1に記載の方法。
- 前記ステップb)は複数の超音波の検出パルスを加えることを含み、前記単一の超音波の押圧パルスは前記複数の超音波の検出パルスのそれぞれよりも有意に長い持続時間を有する、請求項3に記載の方法。
- 前記機械的応力は、複数の超音波の押圧パルスを備える、請求項1に記載の方法。
- 前記ステップe)は、前記加えられた機械的応力によって前記組織で発生させたせん断波の周波数および波速度を使用して波数の実数部分を算出すること、および前記粘弾性の組織特性測定基準を算出するために前記波数の実数部分を使用することをさらに含む、請求項1に記載の方法。
- 前記周波数は中心周波数であり、前記波速度はグループの波速度である、請求項6に記載の方法。
- 前記ステップe)は、前記粘弾性の組織特性測定基準を算出するために前記損失タンジェントを使用して、かつ波数の虚数部分を使用して前記波数の虚数部分を算出することを含む、請求項1に記載の方法。
- 前記ステップe)は、
i)前記加えられた機械的応力によって前記組織で発生させたせん断波の周波数および波速度を使用して波数の実数部分を算出することと、
ii)前記損失タンジェントおよび前記算出された波数の実数部分を使用して波数の虚数部分を算出することと、
iii)前記算出された波数の実数部分および虚数部分を使用して前記粘弾性の組織特性測定基準を算出することと、
を含む、請求項1に記載の方法。 - 前記周波数は中心周波数であり、前記波速度はグループの波速度である、請求項9に記載の方法。
- 前記粘弾性の組織特性測定基準は、貯蔵係数および損失係数の少なくとも1つである、請求項1に記載の方法。
- 前記組織の変位は、前記組織の変位を検出するために超音波エネルギーを使用して測定される、請求項1に記載の方法。
- 前記ステップa)で加えられる前記機械的応力は、前記ステップb)で前記組織の変位を検出するために使用される前記超音波エネルギーによって発生する、請求項12に記載の方法。
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US201361833215P | 2013-06-10 | 2013-06-10 | |
US61/833,215 | 2013-06-10 | ||
PCT/US2014/041737 WO2014201020A1 (en) | 2013-06-10 | 2014-06-10 | System and method for acoustic radiation force creep-recovery and shear wave propagation for elasticity imaging |
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JP6172752B2 (ja) * | 2014-01-21 | 2017-08-02 | ジーイー・メディカル・システムズ・グローバル・テクノロジー・カンパニー・エルエルシー | 超音波診断装置及びプログラム |
CN106802969B (zh) * | 2015-11-26 | 2020-08-07 | 英业达科技有限公司 | 阻尼材料动态特性的验证系统及其验证方法 |
JP6987496B2 (ja) * | 2015-12-04 | 2022-01-05 | キヤノンメディカルシステムズ株式会社 | 解析装置 |
US11071524B2 (en) | 2015-12-04 | 2021-07-27 | Canon Medical Systems Corporation | Analyzing apparatus |
WO2018031725A1 (en) * | 2016-08-11 | 2018-02-15 | Mayo Foundation For Medical Education And Research | Loss-angle-based determination of a medium viscoelastic parameter in sub-hertz frequency range with the use of local creep response |
EP3635383B1 (en) | 2017-06-09 | 2022-11-23 | Technische Universiteit Eindhoven | Shear wave viscoelasticity imaging using local system identification |
US11800979B2 (en) | 2017-12-04 | 2023-10-31 | Bar Ilan University | System and method for calculating a characteristic of a region of interest of an individual |
CN108761414B (zh) * | 2018-05-25 | 2022-05-20 | 电子科技大学 | 一种基于频控阵的s形干扰波束测试方法 |
CN111110275A (zh) * | 2020-01-10 | 2020-05-08 | 深圳大学 | 血管力学性能的测量方法、装置、系统及存储介质 |
US20220230732A1 (en) * | 2021-01-21 | 2022-07-21 | The Boeing Company | Characterizing soft tissue stress for ameliorating injury in performing a process |
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