Document Detail

Calibration-free structured-illumination photoacoustic flowgraphy of transverse flow in scattering media.
MedLine Citation:
PMID:  24718385     Owner:  NLM     Status:  In-Data-Review    
ABSTRACT. We propose a calibration-free photoacoustic (PA) method for transverse flow measurements. In this method, a pulsed periodically structured (i.e., grating patterned) optical beam is used to illuminate flowing absorptive particles in an optically scattering medium. The PA signal amplitudes measured over consecutive laser pulses carry an imprint of the illumination structure. The modulation frequency of the imprint is proportional to the component of the flow speed projected onto the normal axis of the striped illumination pattern. This method can tolerate high particle density, and is insensitive to the particle size, thus calibration-free. Bovine blood and microsphere phantoms were used to validate the proposed method. Blood flow in a mouse ear was measured in vivo as well.
Junjie Yao; Rebecca C Gilson; Konstantin I Maslov; Lidai Wang; Lihong V Wang
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of biomedical optics     Volume:  19     ISSN:  1560-2281     ISO Abbreviation:  J Biomed Opt     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-04-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9605853     Medline TA:  J Biomed Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  46007     Citation Subset:  IM    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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