Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/23640
Title: Manual and automated media and intima thickness measurements of the common carotid artery
Authors: Loizou, Christos P. 
Pattichis, Constantinos S. 
Nicolaides, Andrew N. 
Pantziaris, Marios 
Major Field of Science: Engineering and Technology
Field Category: Medical Engineering
Keywords: Thickness measurement;Carotid arteries;Acoustic waves;Cardiology;Ultrasonic variables measurement;Ultrasonic imaging;Cardiovascular diseases;Chemical vapor deposition;Automation;Textures;Feature extraction;Ultrasonic applications
Issue Date: May-2009
Source: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2009, vol. 56, no. 5, pp. 983-994
Volume: 56
Issue: 5
Start page: 983
End page: 994
Journal: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 
Abstract: The intima-media thickness (IMT) of the common carotid artery (CCA) is widely used as an early indicator of the development of cardiovascular disease (CVD). It was proposed but not thoroughly investigated that the media layer (ML) thickness (MLT), its composition, and its texture may be indicative of cardiovascular risk and for differentiating between patients with high and low risk. In this study, we investigate an automated method for segmenting the ML and the intima layer (IL) and measurement of the MLT and the intima layer thickness (ILT) in ultrasound images of the CCA. The snakes segmentation method was used and was evaluated on 100 longitudinal ultrasound images acquired from asymptomatic subjects, against manual segmentation performed by a neurovascular expert. The mean +/- standard deviation (sd) for the first and second sets of manual and the automated IMT, MLT, and ILT measurements were 0.71 +/- 0.17 mm, 0.72 +/- 0.17 mm, 0.67 +/- 0.12 mm; 0.25 +/- 0.12 mm, 0.27 +/- 0.14 mm, 0.25 +/- 0.11 mm; and 0.43 +/- 0.10 mm, 0.44 +/- 0.13 mm, and 0.42 +/- 0.10 mm, respectively. There was overall no significant difference between the manual and the automated IMC, ML, and IL segmentation measurements. Therefore, the automated segmentation method proposed in this study may be used successfully in the measurement of the MLT and ILT complementing the manual measurements. MLT was also shown to increase with age (for both the manual and the automated measurements). Future research will incorporate the extraction of texture features from the segmented ML and IL bands, which may indicate the risk of future cardiovascular events. However, more work is needed for validating the proposed technique in a larger sample of subjects.
URI: https://hdl.handle.net/20.500.14279/23640
ISSN: 15258955
DOI: 10.1109/TUFFC.2009.1130
Rights: © IEEE
Type: Article
Affiliation : Intercollege 
University of Cyprus 
Vascular Screening and Diagnostic Centre 
Cyprus Institute of Neurology and Genetics 
Publication Type: Peer Reviewed
Appears in Collections:Άρθρα/Articles

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