NDLI: Tracking contrast in echocardiography by a combined snake and optical flow technique

Content Provider	IEEE Xplore Digital Library
Author	Althoff, K. Hamarneh, G. Suurkula, M.B. Gustavsson, T.
Copyright Year	2000
Description	Author affiliation: Dept. of Signals & Syst., Chalmers Univ. of Technol., Goteborg, Sweden (Althoff, K.)
Abstract	Contrast-echocardiography in conjunction with real-time video-densiometry can be an effective means of studying right ventricular (RV) structural changes, e.g. in patients diagnosed with arrhythmogenic right ventricular dysplasia (ARVD). In order to characterize RV flow pattern it may be necessary to track the front of the contrast agent as it enters the RV. The active contour model (ACM) is a standard image analysis method, which can be applied to the time-dynamic tracking problem. To improve tracking speed we extended the formulation of ACM by including an additional force, derived from the optical flow field, another standard image analysis algorithm. This reduced the number of iterations needed to find the front of the contrast agent significantly. Also the changes in intensity of the contrast agent over time were studied. Two groups were compared, one with 30 patients diagnosed with ARVD and one with 18 healthy volunteers. Our study shows that that using our suggested method (calculating wash-in and wash-out time indices) it is possible to discriminate between the two groups.
Starting Page	29
Ending Page	32
File Size	376040
Page Count	4
File Format	PDF
ISBN	0780365577
ISSN	02766547
DOI	10.1109/CIC.2000.898447
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-09-24
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Echocardiography Image motion analysis Image sequence analysis Filling Active contours Cardiac disease Cardiovascular diseases Hemodynamics Image sequences Physiology
Content Type	Text
Resource Type	Article

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