Analysis and quantification of arterial wall motion from B-mode ultrasound images - Comparison of block-matching and optical flow

Stoitsis, J; Golemati, S; Dimopoulos, AK; Nikita, KS

dc.contributor.author	Stoitsis, J	en
dc.contributor.author	Golemati, S	en
dc.contributor.author	Dimopoulos, AK	en
dc.contributor.author	Nikita, KS	en
dc.date.accessioned	2014-03-01T02:43:07Z
dc.date.available	2014-03-01T02:43:07Z
dc.date.issued	2005	en
dc.identifier.issn	05891019	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31244
dc.subject	Block-matching	en
dc.subject	Carotid atherosclerosis	en
dc.subject	Motion	en
dc.subject	Optical flow	en
dc.subject	Ultrasound	en
dc.subject.other	Blood vessels	en
dc.subject.other	Correlation methods	en
dc.subject.other	Motion estimation	en
dc.subject.other	Tissue	en
dc.subject.other	Ultrasonics	en
dc.subject.other	Waveform analysis	en
dc.subject.other	Carotid atheromatous plaque	en
dc.subject.other	Carotid atherosclerosis	en
dc.subject.other	Optical flow	en
dc.subject.other	Plaque motion	en
dc.subject.other	Ultrasound images	en
dc.subject.other	Cardiology	en
dc.title	Analysis and quantification of arterial wall motion from B-mode ultrasound images - Comparison of block-matching and optical flow	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/IEMBS.2005.1615459	en
heal.identifier.secondary	http://dx.doi.org/10.1109/IEMBS.2005.1615459	en
heal.identifier.secondary	1615459	en
heal.publicationDate	2005	en
heal.abstract	Motion of the carotid atheromatous plaque may be responsible for plaque rupture and cerebrovascular symptoms. B-mode ultrasound allows non-invasive recording of arterial wall and plaque motion. Our aim was to analyze quantitatively patterns of arterial wall motion with different techniques. Temporal sequences of digitized B-mode ultrasound images of the carotid arteries of 10 young healthy subjects were interrogated. Arterial wall motion was analyzed using: a/ block-matching, and b/ optical flow. The motion of selected regions of the luminal surface of the arterial wall was estimated using region tracking and block-matching. The motion of areas of the arterial wall was estimated using optical flow. Waveforms showing radial and axial displacements, as well as radial and axial velocities were produced for the selected ROIs using both techniques. Both techniques produced waveforms with peaks, corresponding to cardiac cycle events, that occurred at similar time points. To study the similarity of the waveforms obtained from the two techniques, a cross-correlation coefficient was calculated. Cross-correlation coefficients were 0.72±0.22 and 0.7010.19 for displacements and velocities, espectively, in the radial direction. In the axial direction, the coefficients were 0.32±0.39 and 0.24±0.22 for displacements and velocities, respectively. On the basis of this relative comparison of methods, we conclude that significant observations can be made for each motion analysis technique in terms of characterization of the mechanical properties of the tissue. © 2005 IEEE.	en
heal.journalName	Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings	en
dc.identifier.doi	10.1109/IEMBS.2005.1615459	en
dc.identifier.volume	7 VOLS	en
dc.identifier.spage	4469	en
dc.identifier.epage	4472	en