Dual wavelength endoscopic laser speckle contrast imaging system for indicating tissue blood flow and oxygenation

被引：1
|
作者：
Song, Lipei [1 ,2 ]
Elson, Daniel S. [1 ,2 ]
机构：
[1] Imperial Coll, Hamlyn Ctr Robot Surg, London, England
[2] Imperial Coll, Dept Surg & Canc, London, England
来源：
DYNAMICS AND FLUCTUATIONS IN BIOMEDICAL PHOTONICS IX | 2012年 / 8222卷
关键词：
Laser speckle contrast; oxygenation; dual wavelength speckle; heart beat rate; respiration; DOPPLER; PHOTOPLETHYSMOGRAPHY; MODEL;
D O I：
10.1117/12.908241
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a dual-wavelength endoscopic laser speckle contrast system including illumination with polarization maintaining fibres and imaging using a leached fibre image guide. This system has a frame rate of 10 Hz and can rapidly monitor changes in blood flow in vivo, including due to the heart beat, using the contrast values of the speckle images recorded with 1 ms exposure time. In addition the mean intensities can record the respiration period and can indicate changes in tissue oxygenation. This system was tested during an occlusion to a human finger and is being applied in endoscopy.
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页数：8
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