JP6280235B2 - 適応的復調方法、適応的復調装置及び記憶媒体 - Google Patents
適応的復調方法、適応的復調装置及び記憶媒体 Download PDFInfo
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- A61B8/5269—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving detection or reduction of artifacts
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- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7221—Determining signal validity, reliability or quality
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- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7228—Signal modulation applied to the input signal sent to patient or subject; demodulation to recover the physiological signal
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- A61B5/7235—Details of waveform analysis
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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
- A61B8/46—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient
- A61B8/467—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient characterised by special input means
- A61B8/469—Ultrasonic, sonic or infrasonic diagnostic devices with special arrangements for interfacing with the operator or the patient characterised by special input means for selection of a region of interest
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52046—Techniques for image enhancement involving transmitter or receiver
- G01S7/52047—Techniques for image enhancement involving transmitter or receiver for elimination of side lobes or of grating lobes; for increasing resolving power
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/52017—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00 particularly adapted to short-range imaging
- G01S7/52085—Details related to the ultrasound signal acquisition, e.g. scan sequences
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/48—Diagnostic techniques
- A61B8/485—Diagnostic techniques involving measuring strain or elastic properties
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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
- A61B8/48—Diagnostic techniques
- A61B8/488—Diagnostic techniques involving Doppler signals
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Description
Claims (7)
- a)入力ラジオ周波数(RF)データを獲得する段階と、
b)前記入力ラジオ周波数データを直交復調することにより、IQ(inphase-quadrature)信号を出力する段階と、
c)前記入力ラジオ周波数データに係わる有効領域を決定する段階と、
d)前記入力ラジオ周波数データのうち前記有効領域内に含まれるデータに基づいて、前記IQ信号に対する周波数の減衰を推定し、推定された周波数の減衰に相応する周波数補償を行う段階と、を含み、
前記c)段階は、
ビームフォーミング前データ(previous beamformed data)及びビームフォーミングされたデータ(current beamformed data)に対する相互相関関係(Cross-correlatoin)を獲得するか、またはi番目のスキャンラインチャネルデータと(i+1)番目のスキャンラインチャネルデータとを利用して、2本の仮想走査線をビームフォーミング(beamforming)し、前記2本の仮想走査線に対する相互相関関係を獲得する段階と、
前記相互相関関係に基づいて前記有効領域を決定する段階と、を含む適応的復調方法。 - 前記有効領域を決定する段階は、
ビームフォーミング前データ及びビームフォーミングされたデータから、信号対ノイズ比(SNR)値を獲得する段階と、
前記信号対ノイズ比値に基づいて、前記有効領域を決定する段階と、を含むことを特徴とする請求項1に記載の適応的復調方法。 - 前記d)段階は、
前記IQ信号に対する自己相関関係を獲得する段階と、
前記自己相関関係及び前記有効領域に基づいて、多項フィッティングを行う段階と、
前記多項フィッティングされた結果に基づいて、周波数シフト補償を行う段階と、を含むことを特徴とする請求項1に記載の適応的復調方法。 - 入力ラジオ周波数データを獲得する入力データ獲得部と、
前記入力ラジオ周波数データを直交復調することにより、IQ(inphase-quadrature)信号を出力する直交復調器と、
前記入力ラジオ周波数データに係わる有効領域を決定する有効領域決定部と、
前記入力ラジオ周波数データのうち前記有効領域内に含まれるデータに基づいて、前記IQ信号に対する周波数の減衰を推定し、推定された周波数の減衰に相応する周波数補償を行う周波数補償部と、を含み、
前記有効領域決定部は、
ビームフォーミング前データ(previous beamformed data)及びビームフォーミングされたデータ(current beamformed data)間の相互相関関係(Cross-correlation)を獲得する相互相関器(Cross-correlator)と、前記相互相関関係(Cross-correlation)に基づいて入力ラジオ周波数データに対する多項フィッティング(Polynomial Fitting)を行う多項関数フィッティング部と、前記多項フィッティングを行った結果に基づいて前記有効領域を決定する有効領域選択部とを含むか、あるいは
前記有効領域決定部は、
i番目のスキャンラインチャネルデータと(i+1)番目のスキャンラインチャネルデータとを利用して、2本の仮想走査線をビームフォーミング(beamforming)するビームフォーマ(beamformer)と、前記仮想走査線に基づいて相互相関関係を獲得する相互相関器(Cross-correlator)と、前記相互相関関係に基づいて多項フィッティング(Polynomial Fitting)を行う多項関数フィッティング部と、前記多項関数フィッティング部が多項フィッティングを行った結果に基づいて前記有効領域を決定する有効領域選択部とを含む、適応的復調装置。 - 前記有効領域決定部は、
ビームフォーミング前データ及びビームフォーミングされたデータから、信号対ノイズ比(SNR)値を獲得するSNR推定部と、
前記推定された信号対ノイズ比に基づいて、多項フィッティングを行う多項関数フィッティング部と、
前記多項関数フィッティング部が多項フィッティングを行った結果に基づいて、前記有効領域を決定する有効領域選択部と、を含むことを特徴とする請求項4に記載の適応的復調装置。 - 前記周波数補償部は、
前記IQ信号に対する自己相関関係を獲得する自己相関器と、
前記自己相関関係及び前記有効領域に基づいて、多項フィッティングを行う多項関数フィッティング部と、
前記多項フィッティングされた結果に基づいて、周波数シフト補償を行う周波数シフト補償器と、を含むことを特徴とする請求項4に記載の適応的復調装置。 - 請求項1に記載の適応的復調方法をコンピュータで実行させるためのプログラムを記録したコンピュータで読み取り可能な記録媒体。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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KR10-2014-0035380 | 2014-03-26 | ||
KR1020140035380A KR102376953B1 (ko) | 2014-03-26 | 2014-03-26 | 초음파 영상을 위한 적응 복조 방법 및 장치 |
PCT/KR2015/002549 WO2015147471A1 (en) | 2014-03-26 | 2015-03-17 | Adaptive demodulation method and apparatus for ultrasound image |
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JP2017512570A JP2017512570A (ja) | 2017-05-25 |
JP6280235B2 true JP6280235B2 (ja) | 2018-02-14 |
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JP2016558693A Expired - Fee Related JP6280235B2 (ja) | 2014-03-26 | 2015-03-17 | 適応的復調方法、適応的復調装置及び記憶媒体 |
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US (1) | US20170105705A1 (ja) |
EP (1) | EP3108654A4 (ja) |
JP (1) | JP6280235B2 (ja) |
KR (1) | KR102376953B1 (ja) |
CN (1) | CN106464868B (ja) |
CA (1) | CA2943666C (ja) |
WO (1) | WO2015147471A1 (ja) |
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GB2551376A (en) | 2016-06-16 | 2017-12-20 | Imperial Innovations Ltd | Acoustic sub-aperture processing for ultrasound imaging |
EP4006579A1 (en) * | 2020-11-25 | 2022-06-01 | Supersonic Imagine | Method and system for compensating depth-dependent attenuation in ultrasonic signal data |
EP4318038A1 (en) * | 2022-08-04 | 2024-02-07 | Supersonic Imagine | Method and system for evaluating ultrasound data for the purpose of ultrasound attenuation estimation in a medium |
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EP0437649B1 (de) * | 1990-01-15 | 1994-04-06 | Siemens Aktiengesellschaft | Verfahren zur Ultraschall-Bilddarstellung |
JP3394709B2 (ja) | 1998-08-27 | 2003-04-07 | アロカ株式会社 | 超音波診断装置 |
JP4542258B2 (ja) | 2000-12-21 | 2010-09-08 | アロカ株式会社 | 超音波診断装置 |
US7207942B2 (en) * | 2003-07-25 | 2007-04-24 | Siemens Medical Solutions Usa, Inc. | Adaptive grating lobe suppression in ultrasound imaging |
US7887487B2 (en) * | 2005-07-11 | 2011-02-15 | Siemens Medical Solutions Usa, Inc. | Ultrasound diagnostic flow imaging with coded excitation |
JP5511201B2 (ja) * | 2008-07-31 | 2014-06-04 | キヤノン株式会社 | 信号処理装置、超音波装置、信号処理装置の制御方法及び超音波装置の制御方法 |
JP5925438B2 (ja) * | 2011-06-23 | 2016-05-25 | 株式会社東芝 | 超音波診断装置 |
JP5710566B2 (ja) * | 2012-09-18 | 2015-04-30 | 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 |
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2014
- 2014-03-26 KR KR1020140035380A patent/KR102376953B1/ko active IP Right Grant
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2015
- 2015-03-17 WO PCT/KR2015/002549 patent/WO2015147471A1/en active Application Filing
- 2015-03-17 US US15/129,156 patent/US20170105705A1/en not_active Abandoned
- 2015-03-17 CA CA2943666A patent/CA2943666C/en not_active Expired - Fee Related
- 2015-03-17 JP JP2016558693A patent/JP6280235B2/ja not_active Expired - Fee Related
- 2015-03-17 CN CN201580028641.0A patent/CN106464868B/zh not_active Expired - Fee Related
- 2015-03-17 EP EP15770208.5A patent/EP3108654A4/en not_active Withdrawn
Also Published As
Publication number | Publication date |
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CA2943666A1 (en) | 2015-10-01 |
CN106464868B (zh) | 2019-11-12 |
WO2015147471A1 (en) | 2015-10-01 |
CN106464868A (zh) | 2017-02-22 |
KR20150111698A (ko) | 2015-10-06 |
US20170105705A1 (en) | 2017-04-20 |
EP3108654A4 (en) | 2017-11-29 |
CA2943666C (en) | 2018-12-11 |
KR102376953B1 (ko) | 2022-03-21 |
JP2017512570A (ja) | 2017-05-25 |
EP3108654A1 (en) | 2016-12-28 |
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