Novel polyp detection technology for colonoscopy: 3D optical scanner

Abstract

Background and study aims Fifty-eight percent of American adults aged 50 to 75 undergo colonoscopies. Multiple factors result in missed lesions, at a rate of approximately 20 %, potentially subjecting patients to colorectal cancer. We report on use of a miniaturized optical scanner and accompanying processing software capable of detecting, measuring, and locating polyps with sub-millimeter accuracy, all in real time. Materials and methods A prototype 3 D optical scanner was developed that fits within the dimensions of a standard endoscope. After calibration, the system was evaluated in an ex-vivo porcine colon model, using silicon-made polyps. Results The average distance between two adjacent points in the 3 D point cloud was 94 µm. The results demonstrate high-accuracy measurements and 3 D models while operating at short distances. The scanner detected 6 mm × 3 mm polyps in every trial and identified polyp location with 95-µm accuracy. Registration errors were less than 0.8 % between point clouds based on physical features. Conclusion We demonstrated that a novel 3 D optical scanning system improves the performance of colonoscopy procedures by using a combination of 3 D and 2 D optical scanning and fast, accurate software for extracting data and generating models. Further studies of the system are warranted.

Effect of 3-Dimensional Imaging Device on Polyp and Adenoma Detection During Colonoscopy: A Randomized Controlled Trial

“…It was estimated that approximately 9%-27% of polyps/adenomas were overlooked during the conventional 2D colonoscopy procedure (5,6). In this circumstance, the 3D imaging technology was introduced to improve the PDR and ADR by highlighting the morphological characteristics of lesions, thereby providing assistance for lesion identification (10)(11)(12)(13)(14). Prior evidence indicated that 3D imaging devices could not only increase the contrast between lesions and adjacent mucosa in real time but also did not prolong the operation time (14).…”

Virtual colonoscopy and fibrocolonoscopy in colorectal polyp patients

“…Разработена е нова технология за колоноскопско откриване на колоректални полипи, включваща прототип на миниатюризиран триразмерен оптически скенер с големина на стандартен ендоскоп и компютърна програма за откриване, измерване и локализиране на полипи в реално време с точност под 1 mm (15). Средното разстояние между две съседни точки в триразмерния облак възлиза на 94 µm.…”