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DDSM: Digital Database for Screening Mammography

The Digital Database for Screening Mammography (DDSM) is a database established for use by the mammographic image analysis research community. This project was supported by a grant from the Breast Cancer Research Program of the U.S. Army Medical Research and Materiel Command. The DDSM project is a collaborative effort involving co-p.i.s at the Massachusetts General Hospital, the University of South Florida, and Sandia National Laboratories. Additional collaborating institutions include Sacred Heart Hospital, Washington University School of Medicine and ISMD, Incorporated. The primary purpose of the database is to facilitate sound research in the development of computer algorithms to aid in screening. Secondary purposes of the database may include the development of algorithms to aid in the diagnosis and the development of teaching or training aids. The database contains approximately 2,500 studies. Each study includes two images of each breast, along with some associated patient information (age at time of study, ACR breast density rating, subtletly rating for abnormalities, ACR keyword description of abnormalities) and image information (scanner, spatial resolution, ...). Images containing suspicious areas have associated pixel-level "ground truth" information about the locations and types of suspicious regions. Also provided are software both for accessing the mammogram and truth images and for calculating performance figures for automated image analysis algorithms.

The Digital Database for Screening Mammography is organized into "cases" and "volumes." A "case" is a collection of images and information corresponding to one mammography exam of one patient. A "volume" is simply a collection of cases collected together for purposes of ease of distribution. The DDSM database is under construction. All volumes are available on 8mm tape, and at any given point in time, a number of volumes are also available on-line. The README file explaining "everything" about the database is available, and many answers to questions about the database are listed below.

Note: The Digital Database for Screening Mammography (DDSM) is supported through a grant from the DOD Breast Cancer Research Program, US Army Research and Material Command DAMD17-94-J-4015. The server for the DDSM is a dual processor Sun Sparc 20 with 520 Megs of RAM donated by Sun Microsystems through their Academic Equipment Grant (AEG) program, Grant #: EDUD-US-950408.

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