Digital Database for Screening Mammography

Overview of Volume: cancer_05

This table contains links to overview pages for the cases in this volume. Each overview page contains the ics file, "thumbnails" of the images associated with the case, and the overlay markings of the abnormalities. The "thumbnail" images are meant for visual browsing of the cases only, and are not suitable for any form of experimental work. The thumbnail images were blurred, subsampled, sharpened and converted to eight bits per pixel. Thus, they contain artifacts introduced by this processing (i.e., aliasing, ringing, re-quantization, clipping etc.). Any experimental work should start with the full raw images for the case.

Each case in this volume of cancer cases has at least one path-proven cancer. Some cases contain more than one cancer in one breast, a cancer in each breast, or a cancer along with other abnormal/suspicious regions. The outlines of all regions have been transcribed from markings made by an experienced mammographer. In almost all cases, an abnormality is visible in both views of the breast. However, there are a cases where an abnormality seen in one view is not visible in the other view. This is most often due to the fact that the CC and MLO views do not image exactly the same tissue, but in some cases the abnormality may simply not present any visible signs in one view.

The "ics" header file contains the following information. The "DATE_OF_STUDY" field gives the date that the mammogram was performed. The "PATIENT_AGE" field gives the age of the patient at the time that the mammogram was performed. The "DENSITY" field gives an ACR BI-RADS breast density rating for the case, as assigned by an experienced mammographer. The "DIGITIZER" field indicates the equipment used to digitize the mammogram films. The "LEFT_CC," "LEFT_MLO," RIGHT_CC," and "RIGHT_MLO" fields specify the size of the corresponding images and whether or not a file exists for the overlay of abnormality outlines. The "FILM," "FILM_TYPE," "SEQUENCE" and "DATE_DIGITIZED" fields should be disregarded. They are being maintained for compatibility with earlier versions of the database, but do not contain useful information.

The individual overlay files contain keywords to describe each abnormality. They also contain an ACR BI-RADS assessment code for each abnormality. And they contain a mammographer-assigned "subtlety rating" on a scale of 1 to 5, where 1 is "subtle" and 5 is "obvious." The mammographer was not constrained to provide the same keyword description for a given abnormality in each view. Unusual objects (e.g., pacemaker, breast implant, skin marker) may be visible in some images. These are not identified by an overlay file.

We strongly encourage that whenever research results are presented using cases from this database, a histogram of the subtlety rating of the images used in the research also be presented.

You can order the complete volume on tape. Click here for an order form. The complete cases are also available by anonymous ftp at . Please note that you should be using the lastest version of DDSMView to view the complete cases. You can get it hereor from our ftp site ( in the directory "pub/DDSM/software/bin" using anonymous ftp.

case0031 case0060 case0085 case0125 case0126 case0127 case0128 case0139
case0140 case0141 case0142 case0143 case0144 case0145 case0146 case0147
case0148 case0149 case0150 case0151 case0152 case0153 case0154 case0155
case0156 case0157 case0158 case0159 case0160 case0161 case0162 case0163
case0164 case0165 case0167 case0168 case0169 case0170 case0171 case0172
case0173 case0174 case0175 case0177 case0179 case0180 case0181 case0182
case0183 case0184 case0185 case0187 case0189 case0190 case0191 case0192
case0193 case0194 case0196 case0197 case0198 case0199 case0200 case0201
case0202 case0203 case0204 case0205 case0206 case0207 case0208 case0209
case0210 case0212 case0213 case0214 case0215 case0216 case0218 case0219
case0221 case0222 case0223