CA2235772A1 - Method and apparatus for reflected imaging analysis - Google Patents

Method and apparatus for reflected imaging analysis

Info

Publication number
CA2235772A1
CA2235772A1 CA002235772A CA2235772A CA2235772A1 CA 2235772 A1 CA2235772 A1 CA 2235772A1 CA 002235772 A CA002235772 A CA 002235772A CA 2235772 A CA2235772 A CA 2235772A CA 2235772 A1 CA2235772 A1 CA 2235772A1
Authority
CA
Canada
Prior art keywords
blood
reflected image
per unit
analysis
unit volume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002235772A
Other languages
French (fr)
Other versions
CA2235772C (en
Inventor
Warren Groner
Richard G. Nadeau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cytoprop LLC
Original Assignee
Cytometrics, Inc.
Warren Groner
Richard G. Nadeau
Rheologics, Inc.
Cytometrics, Llc.
Cytoprop Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cytometrics, Inc., Warren Groner, Richard G. Nadeau, Rheologics, Inc., Cytometrics, Llc., Cytoprop Llc filed Critical Cytometrics, Inc.
Publication of CA2235772A1 publication Critical patent/CA2235772A1/en
Application granted granted Critical
Publication of CA2235772C publication Critical patent/CA2235772C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • 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
    • A61B5/026—Measuring blood flow
    • 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
    • A61B5/026—Measuring blood flow
    • A61B5/0261—Measuring blood flow using optical means, e.g. infrared light
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/14535—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue for measuring haematocrit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/41—Detecting, measuring or recording for evaluating the immune or lymphatic systems
    • A61B5/411—Detecting or monitoring allergy or intolerance reactions to an allergenic agent or substance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/04—Investigating sedimentation of particle suspensions
    • G01N15/05—Investigating sedimentation of particle suspensions in blood
    • G01N15/1433—
    • G01N2015/016—
    • G01N2015/018—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/10—Investigating individual particles
    • G01N15/14—Electro-optical investigation, e.g. flow cytometers
    • G01N2015/1497—Particle shape

Abstract

Reflected imaging is used to perform non-invasive, in vivo analysis of a subject's vascular system. A raw reflected image (110) is normalized with respect to the background to form a corrected reflected image (120). An analysis image (130) is segmented from the corrected reflected image to include a scene of interest for analysis. The method and apparatus can be used to determine such characteristics as the hemoglobin concentration per unit volume of blood, the number of white blood cells per unit volume of blood, a mean cell volume, the number of platelets per unit volume of blood, and the hematocrit. Cross-polarizers (1510 and 1520) can be used to improve visualization of the reflected image.
CA002235772A 1995-10-23 1996-10-21 Method and apparatus for reflected imaging analysis Expired - Fee Related CA2235772C (en)

Applications Claiming Priority (13)

Application Number Priority Date Filing Date Title
US583695P 1995-10-23 1995-10-23
US60/005,836 1995-10-23
US1604096P 1996-04-23 1996-04-23
US1603696P 1996-04-23 1996-04-23
US1603996P 1996-04-23 1996-04-23
US1603796P 1996-04-23 1996-04-23
US06/016,039 1996-04-23
US60/016,037 1996-04-23
US60/016,036 1996-04-23
US60/016,040 1996-04-23
US2068596P 1996-06-27 1996-06-27
US60/020,685 1996-06-27
PCT/US1996/016905 WO1997015229A1 (en) 1995-10-23 1996-10-21 Method and apparatus for reflected imaging analysis

Publications (2)

Publication Number Publication Date
CA2235772A1 true CA2235772A1 (en) 1997-05-01
CA2235772C CA2235772C (en) 2002-12-31

Family

ID=27555521

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002235772A Expired - Fee Related CA2235772C (en) 1995-10-23 1996-10-21 Method and apparatus for reflected imaging analysis

Country Status (16)

Country Link
US (2) US5983120A (en)
EP (1) EP0957750A1 (en)
JP (1) JP3267625B2 (en)
KR (1) KR100269563B1 (en)
CN (1) CN1146354C (en)
AP (1) AP931A (en)
AU (2) AU699519B2 (en)
BR (1) BR9611136A (en)
CA (1) CA2235772C (en)
EA (1) EA001936B1 (en)
HK (1) HK1017247A1 (en)
IL (1) IL123966A (en)
MX (1) MX9803129A (en)
NO (1) NO981811L (en)
OA (1) OA10762A (en)
WO (1) WO1997015229A1 (en)

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EA199800411A1 (en) 1998-10-29
BR9611136A (en) 1999-09-14
AU7465396A (en) 1997-05-15
CN1146354C (en) 2004-04-21
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EA001936B1 (en) 2001-10-22
OA10762A (en) 2002-12-12
CA2235772C (en) 2002-12-31
US5983120A (en) 1999-11-09
KR100269563B1 (en) 2000-12-01
JPH11500648A (en) 1999-01-19
MX9803129A (en) 1998-11-30
US6104939A (en) 2000-08-15
CN1200657A (en) 1998-12-02
IL123966A (en) 2000-08-31
AU1856899A (en) 1999-06-17
JP3267625B2 (en) 2002-03-18
AU699519B2 (en) 1998-12-03
NO981811L (en) 1998-06-22
EP0957750A1 (en) 1999-11-24
WO1997015229A1 (en) 1997-05-01
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AP931A (en) 2001-02-02
NO981811D0 (en) 1998-04-22

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