Utilization of a global data grid repository in CAD assessment of carotid wall thickness

Marco A. Gutierrez; Jasper Lee; Zheng Zhou; Paulo E. Pilon; Silvia G. Lage

doi:10.1117/12.709311

21 March 2007 Utilization of a global data grid repository in CAD assessment of carotid wall thickness

Marco A. Gutierrez, Jasper Lee, Zheng Zhou, Paulo E. Pilon, Silvia G. Lage

Author Affiliations +

Proceedings Volume 6516, Medical Imaging 2007: PACS and Imaging Informatics; 651614 (2007) https://doi.org/10.1117/12.709311
Event: Medical Imaging, 2007, San Diego, CA, United States

Abstract

A CAD method of calculating wall thickness of carotid vessels addresses the time-consuming issue of using B-mode ultrasound as well as inter- and intra-observer variability in results. Upon selection of a region-of-interest and filtering of a series of ultrasound carotid images, the CAD is able to measure the geometry of the lumen and plaque surfaces using a least-square fitting of the active contours during systole and diastole. To evaluate the approach, ultrasound image sequences from 30 patients were submitted to the procedure. The images were stored on an international data grid repository that consists of three international sites: Image Processing and Informatics (IPI) Laboratory at University of Southern California, USA; InCor (Heart Institute) at Sao Paulo, Brazil, and Hong Kong Polytechnic University, Hong Kong. The three chosen sites are connected with high speed international networks including the Internet2, and the Brazilian National Research and Education Network (RNP2). The Data Grid was used to store, backup, and share the ultrasound images and analysis results, which provided a large-scale and a virtual data system. In order to study the variability between the automatic and manual definition of artery boundaries, the pooled mean and the standard deviation for the difference between measurements of lumen diameter were computed. The coefficient of variation and correlation were also calculated. For the studied population the difference between manual and automatic measurement of the lumen diameter (LD) and intima-media-thickness (IMT) were 0.12 +/-0.10 and 0.09+/- 0.06, respectively.

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Marco A. Gutierrez, Jasper Lee, Zheng Zhou, Paulo E. Pilon, and Silvia G. Lage "Utilization of a global data grid repository in CAD assessment of carotid wall thickness", Proc. SPIE 6516, Medical Imaging 2007: PACS and Imaging Informatics, 651614 (21 March 2007); https://doi.org/10.1117/12.709311

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KEYWORDS

Ultrasonography

Arteries

Data storage

Computer aided design

Data backup

Image analysis

Heart

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