JP6076364B2 - 聴診のために心音を処理する装置及び方法 - Google Patents
聴診のために心音を処理する装置及び方法 Download PDFInfo
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- JP6076364B2 JP6076364B2 JP2014537771A JP2014537771A JP6076364B2 JP 6076364 B2 JP6076364 B2 JP 6076364B2 JP 2014537771 A JP2014537771 A JP 2014537771A JP 2014537771 A JP2014537771 A JP 2014537771A JP 6076364 B2 JP6076364 B2 JP 6076364B2
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- 238000000034 method Methods 0.000 title claims description 26
- 238000002555 auscultation Methods 0.000 title description 7
- 230000005236 sound signal Effects 0.000 claims description 17
- 230000003321 amplification Effects 0.000 claims description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 14
- 230000011218 segmentation Effects 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 5
- 238000003745 diagnosis Methods 0.000 description 6
- 230000000747 cardiac effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 238000005070 sampling Methods 0.000 description 3
- 208000035211 Heart Murmurs Diseases 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000012952 Resampling Methods 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100001012 cardiac lesion Toxicity 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010247 heart contraction Effects 0.000 description 1
- 208000019622 heart disease Diseases 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000001020 rhythmical effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/7253—Details of waveform analysis characterised by using transforms
- A61B5/7257—Details of waveform analysis characterised by using transforms using Fourier transforms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/7246—Details of waveform analysis using correlation, e.g. template matching or determination of similarity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B7/00—Instruments for auscultation
- A61B7/02—Stethoscopes
- A61B7/04—Electric stethoscopes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Public Health (AREA)
- Molecular Biology (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Surgery (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Signal Processing (AREA)
- Pathology (AREA)
- Biophysics (AREA)
- Acoustics & Sound (AREA)
- Psychiatry (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Artificial Intelligence (AREA)
- Physiology (AREA)
- Mathematical Physics (AREA)
- Cardiology (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Description
Claims (9)
- 心音を表す信号を処理する装置であって、
心音を表す信号を個々の心音周期群にセグメント化するセグメンタであり、該セグメンタは各個々の心臓周期のフーリエ変換を実行する、セグメンタと、
テンプレートとして周期を選択するセレクタであり、前記選択は前記信号において最大の信号雑音比を有する周期に基づく、セレクタと、
周期から前記テンプレートを減算して抽出された成分を取得する差分生成器であり、前記テンプレートのフーリエ変換が前記周期のフーリエ変換から減算されて前記抽出された成分が取得される、差分生成器と、
独立してゲインを制御するための独立した増幅制御手段を有する増幅手段を有する増幅器であり、該増幅器は前記テンプレートのフーリエ変換と前記抽出された成分のフーリエ変換との逆フーリエ変換を生成する逆フーリエ変換生成器を含み、前記増幅器は前記抽出された成分の連結された逆フーリエ変換と前記テンプレートの逆フーリエ変換とを増幅させる、増幅器と、
前記テンプレートのフーリエ変換の前記の増幅された逆フーリエ変換と前記抽出された成分の前記の増幅され連結された逆フーリエ変換とを結合して結合された信号を出力する結合器と、
を含む装置。 - 前記セグメンタが心音を表す前記信号を個々の心音周期群にセグメント化することを支援するための、心電図信号受信器を含む、請求項1に記載の装置。
- 前記セレクタは、メモリ内に記憶されたすべての周期群から、前記周期群の中で最大の信号雑音比を有し、かつ所定閾値より大きい信号雑音比を有する周期を選択する、請求項1に記載の装置。
- 前記セレクタは、連続的に受信する信号から所定閾値信号雑音比を上回る信号雑音比を有する第1の周期を現テンプレートとして選択し、前記現テンプレートを新たな現テンプレートに置換し、前記新たな現テンプレートは、前記現テンプレートより大きな信号雑音比を有する後続の周期である、請求項1に記載の装置。
- 対象者の心音信号を処理する方法であって、
心音信号の単一の周期をセグメント化するセグメント化ステップと、
前記周期のフーリエ変換を実行するフーリエ変換ステップと、
前記周期の信号雑音比を決定する信号雑音比決定ステップと、
最大の信号雑音比を有する信号をテンプレートとして選択する選択ステップと、
前記テンプレートのフーリエ変換を、前記テンプレート以外の周期群のフーリエ変換の各々から減算して抽出された成分を取得する減算ステップと、
前記抽出された成分のフーリエ変換の各々と前記テンプレートのフーリエ変換との逆フーリエ変換を取得する復元ステップと、
前記抽出された成分のフーリエ変換の逆フーリエ変換の各々と前記テンプレートのフーリエ変換の逆フーリエ変換とを制御可能に増幅する増幅ステップと、
前記テンプレートのフーリエ変換の前記の増幅された逆フーリエ変換と前記抽出された成分の前記逆フーリエ変換の各々とを加算して結合された信号を出力する合計ステップと、
を含む方法。 - 前記の単一の心音周期は心電図信号に基づいて決定される、請求項5に記載の方法。
- 前記信号雑音比は、所定周波数を下回る周期のエネルギーと前記所定周波数を上回る周期のエネルギーとの比により決定される、請求項5に記載の方法。
- 前記心音信号は、メモリから検索され、又はリアルタイムで前記対象者から連続的に取得される、請求項5に記載の方法。
- 前記心音信号がメモリから検索される場合、前記心音信号の単一の周期は増幅前に連結され、連続的なループにおいて出力される、請求項5に記載の方法。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN3689CH2011 | 2011-10-28 | ||
IN3689/CHE/2011 | 2011-10-28 | ||
PCT/IB2012/055723 WO2013061221A1 (en) | 2011-10-28 | 2012-10-19 | A device and method for processing heart sounds for auscultation |
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JP2014534024A JP2014534024A (ja) | 2014-12-18 |
JP6076364B2 true JP6076364B2 (ja) | 2017-02-08 |
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JP2014537771A Active JP6076364B2 (ja) | 2011-10-28 | 2012-10-19 | 聴診のために心音を処理する装置及び方法 |
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US (1) | US9237870B2 (ja) |
EP (1) | EP2744413B1 (ja) |
JP (1) | JP6076364B2 (ja) |
CN (1) | CN103889335B (ja) |
BR (1) | BR112014009700A2 (ja) |
WO (1) | WO2013061221A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5786222B2 (ja) * | 2013-07-26 | 2015-09-30 | パナソニック株式会社 | 生体音検査装置及び生体音検査方法 |
US9848848B2 (en) * | 2014-06-30 | 2017-12-26 | The Johns Hopkins University | Lung sound denoising stethoscope, algorithm, and related methods |
KR102532370B1 (ko) | 2015-12-18 | 2023-05-15 | 삼성전자주식회사 | 생체 신호를 처리하는 방법 및 장치 |
US10302687B2 (en) * | 2016-06-14 | 2019-05-28 | General Electric Company | Filtration thresholding |
US11045163B2 (en) | 2017-09-19 | 2021-06-29 | Ausculsciences, Inc. | Method of detecting noise in auscultatory sound signals of a coronary-artery-disease detection system |
US11284827B2 (en) | 2017-10-21 | 2022-03-29 | Ausculsciences, Inc. | Medical decision support system |
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US4792145A (en) * | 1985-11-05 | 1988-12-20 | Sound Enhancement Systems, Inc. | Electronic stethoscope system and method |
JP3952608B2 (ja) * | 1998-09-21 | 2007-08-01 | オムロンヘルスケア株式会社 | 心音計 |
US7940937B2 (en) | 1999-10-28 | 2011-05-10 | Clive Smith | Transducer for sensing body sounds |
US6368283B1 (en) * | 2000-09-08 | 2002-04-09 | Institut De Recherches Cliniques De Montreal | Method and apparatus for estimating systolic and mean pulmonary artery pressures of a patient |
US20040037429A1 (en) * | 2002-08-23 | 2004-02-26 | Candioty Victor A. | Stethoscope |
US7819814B2 (en) * | 2002-10-21 | 2010-10-26 | Noam Gavriely | Acoustic assessment of the heart |
US8311809B2 (en) * | 2003-04-17 | 2012-11-13 | Koninklijke Philips Electronics N.V. | Converting decoded sub-band signal into a stereo signal |
JP2005066044A (ja) * | 2003-08-25 | 2005-03-17 | Konica Minolta Medical & Graphic Inc | 呼吸音データ処理装置及びプログラム |
CA2524507A1 (en) | 2005-10-26 | 2007-04-26 | Coeurmetrics Inc | Multi-sensor high-resolution extraction of heart sounds |
US7806833B2 (en) | 2006-04-27 | 2010-10-05 | Hd Medical Group Limited | Systems and methods for analysis and display of heart sounds |
WO2009009761A1 (en) | 2007-07-11 | 2009-01-15 | Triage Wireless, Inc. | Device for determining respiratory rate and other vital signs |
US8046058B2 (en) | 2007-08-10 | 2011-10-25 | Salutron, Inc. | Heart beat signal recognition |
AU2009220321B2 (en) * | 2008-03-03 | 2011-09-22 | Intellectual Discovery Co., Ltd. | Method and apparatus for processing audio signal |
JP5207174B2 (ja) * | 2008-03-31 | 2013-06-12 | 国立大学法人山口大学 | 心音周波数解析装置 |
US8498424B2 (en) | 2008-08-01 | 2013-07-30 | Texas Instruments Incorporated | Method and apparatus for an adaptive gain control unit |
JP5294085B2 (ja) * | 2009-11-06 | 2013-09-18 | 日本電気株式会社 | 情報処理装置、その付属装置、情報処理システム、その制御方法並びに制御プログラム |
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- 2012-10-19 BR BR112014009700A patent/BR112014009700A2/pt not_active Application Discontinuation
- 2012-10-19 JP JP2014537771A patent/JP6076364B2/ja active Active
- 2012-10-19 US US14/353,296 patent/US9237870B2/en active Active
- 2012-10-19 WO PCT/IB2012/055723 patent/WO2013061221A1/en active Application Filing
- 2012-10-19 CN CN201280052632.1A patent/CN103889335B/zh active Active
- 2012-10-19 EP EP12805463.2A patent/EP2744413B1/en active Active
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JP2014534024A (ja) | 2014-12-18 |
CN103889335B (zh) | 2016-06-22 |
WO2013061221A1 (en) | 2013-05-02 |
US20140288452A1 (en) | 2014-09-25 |
US9237870B2 (en) | 2016-01-19 |
BR112014009700A2 (pt) | 2017-05-09 |
EP2744413B1 (en) | 2017-03-29 |
CN103889335A (zh) | 2014-06-25 |
EP2744413A1 (en) | 2014-06-25 |
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