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Liver segmentation has always been difficult in CAD (Computer-aided diagnosis). Especially, in different layers of liver CT images there may be two or more regions, which add a more arduous problem to liver segmentation. To solve this problem, a new automatic segmentation method for multi-regional liver CT image is presented. That is, first using a preprocessing way based on multi-threshold, morphological...
Low contrast and fuzzy edge are usually exist in the tissues such as liver, stomach, spleen, muscle in abdominal CT image, which makes the segmentation of these organs to be one of the most difficult tasks in medical image CAD system. Based on the fact that the imaginary part of Gabor function is an effective and robust edge detector, an adaptive Gabor filtering method is proposed in this paper, which...
Endoscopy is nearly the most typical instruments that meet the demand of minimum invasive surgery (MIS). However, owing to the complex condition of human intestinal tract and the limitation of traditional colonoscopy, colonoscopy is sometimes a difficult and dangerous procedure. Most difficulties during colonoscopy arise as a result of unpredictable looping of the instrument shaft within the colonic...
The display of the colonoscope shape inside human body is a new technique under development which helps the doctor to judge visually if the patient colon is in normal situation or tends to twist the colonoscope into an unusual and unsafe shape. This paper presents a real-time shape reconstruction method based on biber Bragg grating (FBG) sensor array and a positioning technique of colonoscope's handle...
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