1. A method of performing computer aided examination of digital medical images, comprising: determining a patient exam type of a digital medical image; based on the patient exam type, invoking one or more of a plurality of knowledge based anatomical segmentation blocks, each block performing image segmentation for a single organ or organ system present in the image; and based on the patient exam type, for each successfully segmented organ or organ system, invoking one or more of a plurality of knowledge based computer aided detection blocks, each block of which is designed to search for and locate potential disease foci in a particular organ or organ system.