Digital Database for Screening Mammography

Overview of Volume: cancer_02

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) 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. Please note that you should be using the lastest version of DDSMView to view the complete cases. You can get it here or from our ftp site ( in the directory "pub/DDSM/software/bin" using anonymous ftp.

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case0035 case0036 case0037 case0038 case0040 case0041 case0042 case0043
case0045 case0046 case0047 case0048 case0050 case0051 case0052 case0057
case0059 case0061 case0062 case0063 case0064 case0065 case0067 case0068
case0069 case0070 case0071 case0072 case0073 case0074 case0075 case0076
case0077 case0078 case0079 case0080 case0081 case0082 case0086 case0087
case0088 case0089 case0090 case0091 case0092 case0093 case0094 case0096
case0097 case0098 case0099 case0100 case0102 case0105 case0108 case0110
case0111 case0112 case0113 case0114 case0115 case0118 case0119 case0120
case0121 case0122 case0123 case0124 case0130 case0131 case0132 case0133
case0134 case0135 case0136 case0137 case0138 case3067 case3087 case3088