Abstract
We had earlier developed a technique based on 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. In this paper, this developed technique was applied to completely characterize the region of interest of the geometric shape of B-mode ultrasound images of thin-walled phantom carotid artery imaged in the transverse plane. The developed model employs a combination of fixed landmarks (FLs) and movable landmarks (MLs) to obtain the total landmarks (TLs) that can sufficiently segment the shape of the ROI of the carotid artery. For the phantom carotid arteries, three FLs are fixed on each of the four ROIs determined by the cardinal points North (N), South (S), East (E) and West (W) drawn on the ROIs of the phantom carotid artery. The MLs are determined by the inter-cardinal directions such as North-East (NE), North-West (NW) and so on. The obtained CPS-LDM equation developed allows graphical visualization the optimum number of points that can sufficiently segment the ROIs. ImageJ2 software was used to generate the Cartesian coordinates for each landmark which were then used to generate the Shape Space Pattern (SSP) of the phantom carotid artery ready for further statistical analysis. The results showed that the CPS-LD model is generic and adaptable to a variety of transverse cross-sectional B-mode ultrasound images of thin-walled phantom carotid artery
Highlights
Cardiovascular disease (CVD) is the first leading cause of death and adult disability in the industrial world [1]
The Region of Interest (ROI) of the simulated B-mode ultrasound carotid artery images used in the development of the Cardinal Point Symmetry (CPS)-LDM were modelled as thick-walled images, the images were landmarked with double arc points
The adapted Cardinal Point Symmetry Landmark Distribution Model (CPS-LDM) used for capturing the geometric shape of the thin-walled silicon-tube phantom ultrasound carotid artery images are discussed in the subsequent sections in this paper
Summary
Cardiovascular disease (CVD) is the first leading cause of death and adult disability in the industrial world [1]. We had earlier developed a technique of CPS-LDM to completely characterize the ROI of geometric shape of transverse cross-section of simulated B-mode ultrasound images of carotid arteries [14]. The Region of Interest (ROI) of the simulated B-mode ultrasound carotid artery images used in the development of the CPS-LDM were modelled as thick-walled images, the images were landmarked with double arc points. The adapted Cardinal Point Symmetry Landmark Distribution Model (CPS-LDM) used for capturing the geometric shape of the thin-walled silicon-tube phantom ultrasound carotid artery images are discussed in the subsequent sections in this paper. This section discusses how the CPS-LD Model we had earlier developed in [14] was adapted in segmenting the Region of Interest (ROI) of the imaged region of the transverse cross-section of phantom carotid artery B-mode ultrasound image.
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