Evaluation of a Digital Spot Mammographic Unit Using a Contrast Detail Phantom

The utilization of charged-coupled device detectors (CCD) for digital mammography is an area of active investigation. Smaller field detectors are commercially available and are increasingly utilized on mammographic units to guide stereotactic breast biopsies. Advantages of digital mammography include the following: a wide dynamic range, improved contrast, increased signal to noise ratio, and improved efficiency in image acquisition through a near real-time operation (1,2,3).