Translucency Rendering During Virtual Colonoscopy
Introduction. A 3D tool called translucency rendering has been developed to address this issue by providing infor mation on lesion attenuation beneath the rendered surface. This tool has proved invaluable for prospective screening. By displaying the internal architecture of a polypoid lesion, one can rapidly and effectively distinguish suspected soft tissue lesions from those that can be ignored Purpose. This study was conducted to evaluate a newly developed technique for differentiate color coding of col orectal lesions and ragged stool during three dimensional endoluminal fly through virtual colonoscopy and to deter mine its effect on method efficiency. Materials and methods. During study was examined 150 patients. The patients (age 32-78 years) underwent vir tual colonoscopy, followed by optical colonoscopy, which served as the reference standard. 98 patients were pre pared with full cathartic preparation and 52 patients were prepared with fecal tagging. Results. During study were identified 105 lesions (polyps). Sensitivity was at 95%, specificity 72,5%, accura cy 84,6%. As this pictorial essay will show, by displaying the internal architecture of a polypoid lesion, one can rapidly and effectively distinguish suspected soft tissue lesions from those that can be ignored (i.e., the false polyps), then specificity increase to 87,5%. Reducing the number of 2D correlations that are needed decreases the overall interpre tation time.