JP6866399B2 - カメラ及びパルスオキシメータを使用した高解像度血液灌流撮像 - Google Patents
カメラ及びパルスオキシメータを使用した高解像度血液灌流撮像 Download PDFInfo
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
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- A—HUMAN NECESSITIES
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0077—Devices for viewing the surface of the body, e.g. camera, magnifying lens
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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
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/024—Detecting, measuring or recording pulse rate or heart rate
- A61B5/02416—Detecting, measuring or recording pulse rate or heart rate using photoplethysmograph signals, e.g. generated by infrared radiation
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- A—HUMAN NECESSITIES
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- 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
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- A—HUMAN NECESSITIES
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- A61B5/7235—Details of waveform analysis
- A61B5/7246—Details of waveform analysis using correlation, e.g. template matching or determination of similarity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2505/00—Evaluating, monitoring or diagnosing in the context of a particular type of medical care
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Description
Claims (19)
- 拍動血液灌流マップを測定するためのマルチセンサ撮像システムであって、
患者の基準部位に配置され、基準血液量波形を生成する1つ以上の高精度血流センサと、
前記患者の任意の部位における第2血液量波形を生成する1つ以上の低精度血流センサと、
少なくとも1つの動作可能な接続部によって前記1つ以上の高精度血流センサ及び前記1つ以上の低精度血流センサに接続され、前記基準血液量波形及び前記第2血液量波形を解析することによって前記拍動血液灌流マップを生成し、前記1つ以上の高精度血流センサから得られた前記基準血液量波形を使用して、前記1つ以上の低精度血流センサから得られた前記第2血液量波形の精度を向上する制御部と
を備えるマルチセンサ撮像システム。 - 前記1つ以上の高精度血流センサが、パルスオキシメータ、心電計、動脈カテーテル、及びカメラ式フォトプレチスモグラフィ装置からなる群から選ばれた1つ又は複数のものである、請求項1に記載のマルチセンサ撮像システム。
- 前記1つ以上の高精度血流センサ及び前記1つ以上の低精度血流センサが、同じ物理カメラ装置の同じ視野又は異なる視野を参照する、請求項1に記載のマルチセンサ撮像システム。
- 前記1つ以上の低精度血流センサが、前記患者の身体の基準部位及び撮像部位の少なくともいずれかにおける血流を測定する、請求項1に記載のマルチセンサ撮像システム。
- 前記撮像部位が、前記患者の前記身体の内部部位又は外部部位である、請求項4に記載のマルチセンサ撮像システム。
- 前記1つ以上の低精度血流センサが、光に当たると電気信号を生成する構造を少なくとも備える物理的な装置である、請求項4に記載のマルチセンサ撮像システム。
- 前記1つ以上の高精度血流センサが基準部位における局所的血流を測定する期間と同じ期間に亘って、前記1つ以上の低精度血流センサが画像を生成する、請求項6に記載のマルチセンサ撮像システム。
- 光に当たると電気信号を生成する構造を少なくも備える前記物理的な装置がカメラであり、前記カメラが光学フィルタを備える、請求項6に記載のマルチセンサ撮像システム。
- 前記高精度血流センサの1つ以上及び前記1つ以上の低精度血流センサがカメラであり、少なくとも1つのカメラが光学フィルタを備えている、請求項1に記載のマルチセンサ撮像システム。
- 前記少なくとも1つのカメラが赤外線カメラである、請求項9に記載のマルチセンサ撮像システム。
- 光源が、前記少なくとも1つのカメラが備える前記光学フィルタの透過波長領域に対応する波長領域で被験者を照らす、請求項9に記載のマルチセンサ撮像システム。
- 前記制御部が、局所的血流測定値と、前記患者の身体の1つ以上の基準部位の画像と、前記患者の前記身体の1つ以上の撮像部位の画像とに基づき、拍動血液灌流マップを生成するハードウェア装置である、請求項1に記載のマルチセンサ撮像システム。
- 拍動血液灌流マップを測定する方法であって、
患者の基準部位に配置した1つ以上の高精度血流センサ(動脈カテーテルを除く)を使用して基準血液量波形を得る手順と、
これと同時に、1つ以上の低精度血流センサを使用して前記患者の身体の任意の対象領域の第2血液量波形を得る手順と、
前記基準血液量波形を使用して前記第2血液量波形の振幅を推定する手順と、
拍動灌流マップに比例する、前記血液量波形の前記振幅の空間マップを生成する手順と、
を含み、
さらに、前記1つ以上の高精度血流センサから得られた前記基準血液量波形を使用して、前記1つ以上の低精度血流センサから得られた前記第2血液量波形の精度を向上する手順と、
を含む、拍動血液灌流マップを測定する方法。 - 前記1つ以上の高精度血流センサが、パルスオキシメータ、心電計、及びカメラ式フォトプレチスモグラフィ装置からなる群から選ばれた1つ又は複数のものである、請求項13に記載の方法。
- 前記高精度血流センサの1つ以上及び前記1つ以上の低精度血流センサがカメラであり、少なくとも1つのカメラが光学フィルタを備えている、請求項13に記載の方法。
- 前記振幅を推定することが、前記高精度血流センサを使用して記録した前記基準血液量波形を前提として、前記カメラセンサの各画素ブロックから得た前記第2血液量波形の前記振幅を推定することによって行われる、請求項13に記載の方法。
- 前記1つ以上の高精度血流センサがパルスオキシメータであり、前記1つ以上の低精度血流センサがビデオカメラを備える場合、前記ビデオカメラセンサの各画素ブロックから得た前記第2血液量波形の振幅が、パルスオキシメータを使用して記録した前記基準血液量波形を前提に推定される、請求項13に記載の方法。
- 前記1つ以上の低精度血流センサに対応するオプティカルパスからパルス信号を無相関化することによって前記血液灌流マップから誤差を除去する手順を更に含む、請求項13に記載の方法。
- 対象領域の血液量の変化に起因する明るさの変動に対し変動が生じないオプティカルフローアルゴリズムを用いて、前記血液灌流マップから誤差を除去する手順を更に含む、請求項13に記載の方法。
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PCT/US2017/032451 WO2017197289A1 (en) | 2016-05-12 | 2017-05-12 | High resolution blood perfusion imaging using a camera and a pulse oximeter |
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CN112545456B (zh) * | 2020-11-27 | 2021-09-14 | 中国科学院西安光学精密机械研究所 | 一种皮肤不同深度血流灌注实时监测方法及系统 |
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US5983120A (en) * | 1995-10-23 | 1999-11-09 | Cytometrics, Inc. | Method and apparatus for reflected imaging analysis |
US6701170B2 (en) * | 2001-11-02 | 2004-03-02 | Nellcor Puritan Bennett Incorporated | Blind source separation of pulse oximetry signals |
KR100823886B1 (ko) * | 2006-12-08 | 2008-04-21 | 김성근 | 적외선 광학계를 이용한 피하 혈관 탐지 영상 장치 |
US10506960B2 (en) * | 2013-07-10 | 2019-12-17 | Koninklijke Philips N.V. | System for screening of the state of oxygenation of a subject |
WO2015032948A1 (en) * | 2013-09-09 | 2015-03-12 | Gambro Lundia Ab | Separation of interference pulses from physiological pulses in a pressure signal |
US9999355B2 (en) * | 2014-02-12 | 2018-06-19 | Koninklijke Philips N.V. | Device, system and method for determining vital signs of a subject based on reflected and transmitted light |
EP3188651A4 (en) * | 2014-10-14 | 2018-07-04 | East Carolina University | Methods, systems and computer program products for visualizing anatomical structures and blood flow and perfusion physiology using imaging techniques |
US11304604B2 (en) * | 2014-10-29 | 2022-04-19 | Spectral Md, Inc. | Reflective mode multi-spectral time-resolved optical imaging methods and apparatuses for tissue classification |
US9770213B2 (en) * | 2014-10-30 | 2017-09-26 | Koninklijke Philips N.V. | Device, system and method for extracting physiological information |
CA2972708C (en) | 2014-11-25 | 2020-06-30 | William Marsh Rice University | Camera based photoplethysmogram estimation |
US10292663B2 (en) * | 2015-06-30 | 2019-05-21 | Covidien Lp | System and method of monitoring autoregulation |
CN105266825B (zh) * | 2015-12-02 | 2017-10-31 | 薛光玉 | 一种血氧供给检测方法 |
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