Automated visibility map from colonoscopy video to support clinical diagnosis and improve the quality of colonoscopy
Colorectal cancer is one of the leading causes of cancer related death in Australia and the world. When diagnosed early, survival from cancerous polyps can increase up to 90%. Among screening methods, optical colonoscopy is widely used to diagnose and remove cancerous polyps. Although optical colonoscopy is an effective procedure for diagnosing colorectal cancer, there are many factors that affect the quality of this intervention. Inspecting the whole colonic surface in order to detect polyps and other lesions is challenging because haustral folds can hide lesions, the organ might deform, visibility can be reduced due to dirty lens, and also because challenges in operating the colonoscope could result in not visualising all the colon surface. An undesirable consequence is missing cancerous lesions, up to 33% according to recent publications.
We have developed an assistive technology to improve the quality of the colonoscopy. From the colonoscopy video a panoramic view of internal colon surface is automatically created (visibility map). We tested and validated this technology on our colonoscopy simulator and real colonoscopy videos.
Our results showed that this method could reduce the number of uncovered areas by identifying them on the visibility map. In the future we aim at developing real-time assistive application to help reduce colorectal cancer.
Benefits of a visibility map
Generating a visibility map from internal colonÂ surface