UCLA

Phase Stretch Transform (PST) is a physics-inspired computational approach developed in Jalali lab for feature enhancement in images. Here, it is applied to medical images. The results of its application to X-rays leads to development of an assistance tool for diagnosis of pneumothorax in X-ray images. The tool, which is first-of-its-kind, helps in locating the boundary of a collapsed lung, a life-critical clinical examination which is otherwise difficult for a radiologist to locate with a naked eye.

Additionally, PST is applied to other medical images, such as histology and mammograms, to demonstrate feature enhancement. The resulting edge detection map offers promising application in segmentation and analysis of medical images which is explored here. Further, texture segmentation using PST is also demonstrated.