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Title: Photoacoustic determination of blood vessel diameter.
Author(s): Kolkman, R.G.; Klaessens, J.H.G.M. ; Hondebrink, E.; Hopman, J.C.W. ; Mul, F.F. de; Steenbergen, W.; Thijssen, J.M. ; Leeuwen, T.G. van
Publication year: 2004
Source: Physics in Medicine and Biology, vol. 49, iss. 20, (2004), pp. 4745-4756
ISSN: 0031-9155
DOI: https://doi.org/10.1088/0031-9155/49/20/006
Publication type: Article / Letter to editor

Please use this identifier to cite or link to this item : http://hdl.handle.net/2066/57562   http://hdl.handle.net/2066/57562

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Subject: UMCN 2.1: Heart, lung and circulation
Organization: Paediatrics
Journal title:
Physics in Medicine and Biology
Volume: vol. 49
Issue: iss. 20
Page start: p. 4745
Page end: p. 4756
Abstract:
A double-ring sensor was applied in photoacoustic tomographic imaging of artificial blood vessels as well as blood vessels in a rabbit ear. The peak-to-peak time (tau(pp)) of the laser (1064 nm) induced pressure transient was used to estimate the axial vessel diameter. Comparison with the actual vessel diameter showed that the diameter could be approximated by 2ctau(pp), with c the speed of sound in blood. Using this relation, the lateral diameter could also precisely be determined. In vivo imaging and monitoring of changes in vessel diameters was feasible. Finally, acoustic time traces were recorded while flushing a vessel in the rabbit ear with saline, which proved that the main contribution to the laser-induced pressure transient is caused by blood inside the vessel and that the vessel wall gives only a minor contribution.

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