JPWO2018164181A1 - 組織弾性の測定装置及び測定方法 - Google Patents
組織弾性の測定装置及び測定方法 Download PDFInfo
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/488—Diagnostic techniques involving Doppler signals
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/06—Measuring blood flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
- A61B8/0833—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving detecting or locating foreign bodies or organic structures
- A61B8/085—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving detecting or locating foreign bodies or organic structures for locating body or organic structures, e.g. tumours, calculi, blood vessels, nodules
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- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
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- A61B8/485—Diagnostic techniques involving measuring strain or elastic properties
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- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5207—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of raw data to produce diagnostic data, e.g. for generating an image
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
- A61B8/5223—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data for extracting a diagnostic or physiological parameter from medical diagnostic data
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Abstract
Description
ここで、nは脈波形を構成する血流速値のサンプル数であり、Viは脈波形における血流速度(m/s)であり、Vm_peakは血流速度の平均値(m/s)である。変動係数(CV値)は、簡易ベルヌーイ式により平均圧較差MPG(mmHg)を用いて次式(2)で表すことができる。
平均圧較差MPGは、異なる箇所間の圧力差を示すパラメーターであり簡易ベルヌーイの式により着目する箇所の血流速度をVとして圧較差ΔP(mmHg)=4V2で近似的に求められる。本実施形態では、主制御部41がトレース波形つまり波形トレース後の脈波形から圧較差MPGを計算することができ、波形トレース後のトレース波形又は脈波形からそのばらつきすなわち血流速度のばらつきに関するCV値も得ることができる。
Claims (9)
- パルスウェーブドプラ法によって血流速度に対応する脈波形を計測する超音波計測部と、
前記超音波計測部によって得た脈波形から変動係数に相当する偏差指標値を算定する情報処理部と
を備える組織弾性の測定装置。 - 前記情報処理部は、脈波形の各時相の絶対値最大流速、最大値、最小値、及び平均値の少なくとも1つを決定する波形処理部を有し、前記絶対値最大流速、前記最大値、前記最小値、及び前記平均値の少なくとも1つから変動係数を算出する、請求項1に記載の組織弾性の測定装置。
- 前記波形処理部は、流速の上昇ピークを有する逆行性の第1波形部と、流速の降下ピークを有する順行性の第2波形部と、流速の降下ピークを有する順行性の第3波形部とを拍動周期中に有する3相の標準的な脈波形に当てはめるように包絡線を抽出して変動係数を算出する、請求項2に記載の組織弾性の測定装置。
- 前記第1波形部がある場合、前記第1波形部の絶対値の高速側の包絡線を抽出し、前記第2波形部がある場合、前記第2波形部の絶対値の高速側の包絡線を抽出し、前記第3波形部がある場合、前記第3波形部の絶対値の高速側の包絡線を抽出する、請求項3に記載の組織弾性の測定装置。
- 前記情報処理部は、複数の拍動周期に対応する静脈波形から前記偏差指標値を計測する、請求項1〜5のいずれか一項に記載の組織弾性の測定装置。
- 前記超音波計測部は、ドプラ成分から高速フーリエ変換を利用して時間の分解能ごとに流速の測定値を生成する、請求項1〜6のいずれか一項に記載の組織弾性の測定装置。
- 前記超音波計測部は、肝臓の静脈波形を計測する、請求項1〜7のいずれか一項に記載の組織弾性の測定装置。
- パルスウェーブドプラ法によって血流速度に対応する脈波形を得る測定方法であって、
計測によって得た脈波形から変動係数に相当する偏差指標値を算定する、組織弾性の測定方法。
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JP2017042460 | 2017-03-07 | ||
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PCT/JP2018/008758 WO2018164181A1 (ja) | 2017-03-07 | 2018-03-07 | 組織弾性の測定装置及び測定方法 |
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JPWO2018164181A1 true JPWO2018164181A1 (ja) | 2020-02-06 |
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US (1) | US11517287B2 (ja) |
EP (1) | EP3593729A4 (ja) |
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WO (1) | WO2018164181A1 (ja) |
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JP6855550B1 (ja) * | 2019-10-29 | 2021-04-07 | ゼネラル・エレクトリック・カンパニイ | 超音波診断装置 |
CN112819786B (zh) * | 2021-02-01 | 2023-11-28 | 北京精康科技有限责任公司 | 基于多个肝静脉波形图的肝脏血液动力检测装置 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20030109785A1 (en) * | 1999-03-05 | 2003-06-12 | The General Hospital Corporation | Method and apparatus for measuring volume flow and area for a dynamic orifice |
JP2006325746A (ja) * | 2005-05-24 | 2006-12-07 | Olympus Medical Systems Corp | 超音波診断装置 |
JP2012170748A (ja) * | 2011-02-23 | 2012-09-10 | Toshiba Corp | 超音波診断装置、及び超音波診断プログラム |
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US4182173A (en) * | 1978-08-23 | 1980-01-08 | General Electric Company | Duplex ultrasonic imaging system with repetitive excitation of common transducer in doppler modality |
GB9726773D0 (en) * | 1997-12-18 | 1998-02-18 | Nycomed Imaging As | Improvements in or relating to ultrasonagraphy |
JP3530892B2 (ja) * | 2001-10-10 | 2004-05-24 | コーリンメディカルテクノロジー株式会社 | 血管障害診断装置 |
JP5467987B2 (ja) | 2010-11-18 | 2014-04-09 | 古野電気株式会社 | 超音波軟骨解析装置、超音波軟骨解析方法及びプログラム |
JP6139242B2 (ja) | 2013-04-22 | 2017-05-31 | 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その制御プログラム |
WO2015026787A2 (en) * | 2013-08-19 | 2015-02-26 | University Of Utah Research Foundation | Ultrasound apparatus, system, and method |
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- 2018-03-07 US US16/490,397 patent/US11517287B2/en active Active
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20030109785A1 (en) * | 1999-03-05 | 2003-06-12 | The General Hospital Corporation | Method and apparatus for measuring volume flow and area for a dynamic orifice |
JP2006325746A (ja) * | 2005-05-24 | 2006-12-07 | Olympus Medical Systems Corp | 超音波診断装置 |
JP2012170748A (ja) * | 2011-02-23 | 2012-09-10 | Toshiba Corp | 超音波診断装置、及び超音波診断プログラム |
Non-Patent Citations (1)
Title |
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篠塚望,小山勇,鈴木義隆,中村聡美,小川展二,大塚健二,沼尻良克,渡辺拓自,尾本良三 他: "超音波ドプラ法を用いた肝硬変症における肝静脈血流の検討", 日本外科系連合学会誌, vol. 23, no. 5, JPN6018020272, October 1998 (1998-10-01), JP, pages 748 - 788, ISSN: 0004295040 * |
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US20200245974A1 (en) | 2020-08-06 |
WO2018164181A1 (ja) | 2018-09-13 |
EP3593729A4 (en) | 2020-12-30 |
JP6783007B2 (ja) | 2020-11-11 |
EP3593729A1 (en) | 2020-01-15 |
US11517287B2 (en) | 2022-12-06 |
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