Title :
ECG-triggering of the laser Doppler perfusion imaging signal
Author :
Wårdell, K. ; Eriksson, O.
Author_Institution :
Dept. of Biomed. Eng., Linkoping Univ., Sweden
fDate :
29 Oct-1 Nov 1998
Abstract :
Laser Doppler perfusion imaging is a non-invasive system for the mapping of microvascular blood flow. To be able to investigate the influence on the signal caused by the heart synchronous wave pattern, an ECG-triggered function has been added to the system. This function allows mapping of data at fixed delay times from the R-peak. ECG-triggered laser Doppler measurements on forearm skin before and after provocation showed that the highest blood flow was recorded 200-300 ms after the R-peak. During pulsative skin blood flow the influence from the heart cycle was larger compared to low non-pulsative blood flow. With ECG-triggering, this temporal component originating from the cardiac cycle can be reduced to a minimum
Keywords :
Doppler measurement; biomedical imaging; blood flow measurement; blood vessels; cardiovascular system; electrocardiography; haemorheology; laser applications in medicine; laser velocimetry; skin; ECG-triggering; R-peak; fixed delay times; forearm skin; heart synchronous wave pattern; laser Doppler perfusion imaging signal; microvascular blood flow mapping; noninvasive system; pulsative skin blood flow; temporal component; Biomedical engineering; Biomedical imaging; Blood flow; Delay effects; Doppler measurements; Electrocardiography; Heart; Performance evaluation; Signal processing; Skin;
Conference_Titel :
Engineering in Medicine and Biology Society, 1998. Proceedings of the 20th Annual International Conference of the IEEE
Conference_Location :
Hong Kong
Print_ISBN :
0-7803-5164-9
DOI :
10.1109/IEMBS.1998.746962
