scholarly journals Automated 3D geometry segmentation of the healthy and diseased carotid artery in free‐hand, probe tracked ultrasound images

2020 ◽  
Vol 47 (3) ◽  
pp. 1034-1047
Author(s):  
Joerik Ruijter ◽  
Marc Sambeek ◽  
Frans Vosse ◽  
Richard Lopata
Keyword(s):  
Carotid Artery ◽  
Ultrasound Images ◽  
Tracked Ultrasound ◽  
3D Geometry

Adaptation of Cardinal Points Symmetry Landmarks Distribution Model to in-vivo B-Mode Ultrasound Images of Transverse Cross-section of Carotid Arteries

2021 ◽  
Vol 6 (7) ◽  
pp. 107-113
Author(s):  
Charles Nnamdi Udekwe ◽  
Akinlolu Adediran Ponnle
Keyword(s):  
Carotid Artery ◽  
Cross Section ◽  
Carotid Arteries ◽  
Region Of Interest ◽  
Transverse Cross Section ◽  
Transverse Plane ◽  
Distribution Model ◽  
Ultrasound Images ◽  
Symmetry Line

The geometry of the imaged transverse cross-section of carotid arteries in in-vivo B-mode ultrasound images are most times irregular, unsymmetrical, full of speckles and usually non-uniform. We had earlier developed a technique of cardinal point symmetry landmark distribution model (CPS-LDM) to completely characterize the Region of Interest (ROI) of the geometric shape of thick-walled simulated B-mode ultrasound images of carotid artery imaged in the transverse plane, but this was based on the symmetric property of the image. In this paper, this developed technique was applied to completely characterize the region of interest of the geometric shape of in-vivo B-mode ultrasound images of non-uniform carotid artery imaged in the transverse plane. In order to adapt the CPS-LD Model to the in-vivo carotid artery images, the single VS-VS vertical symmetry line common to the four ROIs of the symmetric image is replaced with each ROI having its own VS-VS vertical symmetry line. This adjustment enables the in-vivo carotid artery images possess symmetric properties, hence, ensuring that all mathematical operations of the CPS-LD Model are conveniently applied to them. This adaptability was observed to work well in segmenting the in-vivo carotid artery images. This paper shows the adaptive ability of the developed CPS-LD Model to successfully annotate and segment in-vivo B-mode ultrasound images of carotid arteries in the transverse cross-sectional plane either they are symmetrical or unsymmetrical.

Carotid Artery Recognition System(CARS): A Comparison of Three Automated Paradigms for Ultrasound Images

2013 ◽  
pp. 221-236
Author(s):  
Filippo Molinari ◽  
Kristen Mariko Meiburger ◽  
U. Rajendra Acharya ◽  
William Liboni ◽  
Andrew Nicolaides ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Recognition System ◽  
Ultrasound Images

Carotid distensibility, baroreflex sensitivity, and orthostatic stress

2005 ◽  
Vol 99 (1) ◽  
pp. 64-70 ◽  
Author(s):  
Craig D. Steinback ◽  
Deborah D. O’Leary ◽  
Jason Bakker ◽  
Angela D. Cechetto ◽  
Hanif M. Ladak ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Stroke Volume ◽  
Baroreflex Sensitivity ◽  
Ultrasound Images ◽  
Early Systole ◽  
Rapid Changes ◽  
Sequence Method ◽  
Head Up Tilt ◽  
Carotid Distensibility ◽  
Induced Changes

In this study, we tested the hypothesis that carotid arteries undergo rapid changes in distensibility on moving from the supine to head-up tilt (HUT) postures and, subsequently, that this change in carotid distensibility (cDa) might be associated with concurrent reductions in cardiovagal baroreflex sensitivity (BRS). Thus the effect of posture on carotid vascular mechanics and cardiovagal BRS with consideration for altered central hemodynamics (i.e., stroke volume; Doppler ultrasound) was examined. Carotid pulse pressure (cPP; Millar transducer) and contralateral B-mode ultrasound images were assessed at the carotid artery during supine and 60° HUT postures. From these measures, cDa was calculated at 5-mmHg pressure increments experienced during the cardiac cycle ( n = 6). cPP ( n = 9) was not different in the two postures. A smaller stroke volume being ejected into a smaller carotid artery in HUT explained the maintenance of cPP in HUT. Also, compared with supine, cDa was reset to a lower level in HUT (main effect of posture; P < 0.05). Cardiovagal BRS (sequence method) was diminished in HUT vs. supine ( P < 0.05). A positive correlation was observed between the tilt-induced changes in maximal cDa (in early systole) and cardiovagal BRS ( r2 = 0.75; P < 0.05), but there was little predictive relationship between changes in cPP, systolic vessel dimensions, or average cDa and the corresponding change in BRS. The present results indicate that HUT elicits rapid changes in carotid artery mechanics and further suggest that reductions in the maximal cDa measured in early systole contribute to reduced cardiovagal BRS with HUT.

Using the Hough Transform to Segment Ultrasound Images of Longitudinal and Transverse Sections of the Carotid Artery

2007 ◽  
Vol 33 (12) ◽  
pp. 1918-1932 ◽  
Author(s):  
Spyretta Golemati ◽  
John Stoitsis ◽  
Emmanouil G. Sifakis ◽  
Thomas Balkizas ◽  
Konstantina S. Nikita
Keyword(s):  
Carotid Artery ◽  
Hough Transform ◽  
Ultrasound Images
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