The institutional review board approved this retrospective study and waived the need for informed consent. For the purpose of this study, a dedicated mammographic workstation was developed that has the basic functionality that screening radiologists expect when they read digital mammograms on electronic displays, including dedicated hanging protocols, zooming, image manipulation, and local contrast enhancement tools. Brightness and contrast were easily adjustable and were set in advance for optimal efficiency. The workstation was equipped with a 30-inch color LCD panel (model FlexScan SX3031W; Eizo Nanao Technologies Inc., Hakui, Ishikawa, Japan) with a native resolution of 2,560 × 1,600. CAD processing was performed on a separate server and results were submitted to the workstation with the image data before a reading session started. CAD results were obtained from the R2 ImageChecker v8.0 (Hologic, Bedford, MA, USA).