Colon VCAR EC is a CT image analysis software package which allows the visualization of 2D and 3D medical image data of the colon derived from DICOM 3.0 compliant CT scans for the purpose of screening of a colon to detect polyps, masses, cancers, and other lesions. It provides functionality for 2D/3D rendering, bookmarking of suspected lesions, synchronized viewing of the 2D, 3D and 360 dissection views, and an object oriented endoluminal display. In comparison to Colonoscopy, this tool has an advantage of depth penetration due to its 3D presentation capability. It is intended for use by clinicians to process, render, review, archive, print and distribute colon image studies. The Colon VCAR DCA (Digital Contrast Agent) module is an automated highlight feature for the visual identification of spherical structures within the colon and is intended to be used as a concurrent reading device. Digital Contrast Agent is a 3D filter that produces images that highlight spherical anatomical regions, such as polyps, and/or stool. Colon VCAR uses color to display these highlighted spheres. Images are made available to the physician to aid in characterization of potential polyps and thus, the patient management care decision process.