The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 1994
Filed:
Nov. 21, 1991
Applicant:
Inventors:
Assignee:
Kowa Company Ltd., , JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128633 ; 128634 ;
Abstract
An apparatus for measuring blood flow repeatedly segmentally scans a region of in vivo tissue with a coherent light beam. Each scanning segment comprises a scanning period during which the light beam is scanned and a rest period during which the light beam is not scanned. During the rest period, the light beam is directed at a measuring point of the in vivo tissue. Measurement data is obtained dependent on the intensity of scattered light from the measurement point. The measurement data is time series data of chronological changes in the intensity of scattered light caused by blood in the in vivo tissue. The blood flow rate is calculated from frequency-analysis of the time series data.