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

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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 http://hdl.handle.net/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


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