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Reference | Basis of technique | Applications | Limitations |
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[3] | Cost function minimization | Intima-media thickness (IMT) and arterial lumen diameter measurement. | Extensive manual corrections were reported to be required |
[5] | Greyscale intensity and gradient thresholding | Endothelium-dependent dilation of the brachial artery. | Dependence on vessel orientation, curvature, and appearance |
[2] | Edge detection | Carotid artery diameter and intima-media thickness (IMT) measurement. | Operator intervention is frequently needed during the systolic expansion of the artery when the arterial wall moves a relatively large distance between frames |
[6] | Active contours | Detection of the intima-media complex of the far wall of the common carotid artery. | Long processing times |
[7] | Artificial neural networks | Detection of the near and far walls of the artery in the longitudinal plane. | Relatively horizontal and straight vessel assumed |
[1] | Region tracking/block matching | Estimation of carotid artery wall motion. | Limited number of points can be tracked due to computational cost and speckle decorrelation |
[8] | Fast marching algorithm | Segmentation of intravascular ultrasound images in 3D. | Required manual delineation of initial contours close to the arterial lumen boundaries |
[9] | Hough transform | Extraction of carotid artery surface in the longitudinal and transverse planes. | Longitudinal and transverse arterial sections approximated as straight lines and circles |
[10] | Polar representation, grey-level histograms, cost function minimization, and probabilistic considerations | Delineation of lumen boundaries in intravascular ultrasound (IVUS) images. | Specific to IVUS, modeled the lumen surface as a mixture of Gaussians placing limitations on the type of contour that can be traced |
[11] | Edge detection and mathematical morphology | Delineate vessel lumen boundaries in transverse cross-sections of the common carotid artery. | Whether the method is also expected to work for longitudinal cross sections of arteries is not known. Also, edge detection techniques have an inherent vulnerability to image noise |
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