Title:
BLOOD FLOW VELOCITY MEASUREMENT
Document Type and Number:
WIPO Patent Application WO2003039364
Kind Code:
A3
Abstract:
Flow measuring apparatus includes an excitation laser (30) for irradiating a sample (26) with excitation laser light (34). The light is modulated by modulator (32). In the excitation region (38), the light excites ultrasound which is picked up by an ultrasound detector (6) and processed in demodulator (6). The equipment is of particular application to measuring the speed of blood flow in human or animal tissue. By exciting ultrasound using light rather than directly sending ultrasound in tissue a good ultrasound signal from the blood (10) in blood vessel (8) may be generated since light is strongly absorbed by blood.
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Inventors:
BEARD PAUL (GB)
Application Number:
PCT/GB2002/004977
Publication Date:
October 16, 2003
Filing Date:
November 04, 2002
Export Citation:
Assignee:
UNIV LONDON (GB)
BEARD PAUL (GB)
BEARD PAUL (GB)
International Classes:
A61B5/026; A61B8/06; (IPC1-7): A61B5/026; A61F1/66
Domestic Patent References:
| WO1998038904A1 | 1998-09-11 | |||
| WO2000000783A1 | 2000-01-06 |
Foreign References:
| EP1134559A2 | 2001-09-19 | |||
| US6161426A | 2000-12-19 | |||
| US6100969A | 2000-08-08 |
Other References:
BEARD P C ET AL: "Optical fiber photoacoustic-photothermal probe", OPTICS LETTERS, 1 AUG. 1998, OPT. SOC. AMERICA, USA, vol. 23, no. 15, pages 1235 - 1237, XP002248562, ISSN: 0146-9592
BLODGETT D W ET AL: "LASER ULTRASONIC TECHNIQUES FOR ASSESSMENT OF TOOTH STRUCTURE", PROCEEDINGS OF THE SPIE, SPIE, BELLINGHAM, VA, US, vol. 3914, 22 January 2000 (2000-01-22), pages 588 - 598, XP008003906
BLODGETT D W ET AL: "LASER ULTRASONIC TECHNIQUES FOR ASSESSMENT OF TOOTH STRUCTURE", PROCEEDINGS OF THE SPIE, SPIE, BELLINGHAM, VA, US, vol. 3914, 22 January 2000 (2000-01-22), pages 588 - 598, XP008003906
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