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Summary: Computer Methods and Programs in Biomedicine 67 (2002) 2737
Using snakes to detect the intimal and adventitial layers of
the common carotid artery wall in sonographic images
Da-chuan Cheng a,
*, Arno Schmidt-Trucksa¨ss b
, Kuo-sheng Cheng a
,
Hans Burkhardt c
a
Institute of Biomedical Engineering, National Cheng Kung Uni6ersity, Tainan, Taiwan
b
Department of Rehabilitation, Pre6ention and Sports Medicine, Freiburg Uni6ersity Hospital, Freiburg, Germany
c
Department of Computer Science, Freiburg Uni6ersity, Freiburg, Germany
Received 20 April 2000; received in revised form 25 September 2000; accepted 16 October 2000
Abstract
This study presents an innovative automatic system for detecting the intima-media complex of the far wall of the
common carotid artery by applying the snake techniques. Cohen's snake was modified and some criteria were added
for our applications. In addition, the oscillating problem of using snakes was solved by properly choosing the time
step from analysis of the frequency response of the filters. A time-diminishing gravity window, external forces, and
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