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Breast Imaging-Reporting and Data System. A quality assurance system and lexicon originally designed for reporting mammography results from patients with breast cancer, and published as an atlas by the American College of Radiology. The BI-RADS Atlas is a peer-reporting (i.e., not for lay or patient use) tool which now includes three imaging modalities: mammography, ultrasound and MRI.

There is considerable variability in the correct interpretation of mammograms among radiologists—there is a moderate agreement among radiologists in reporting an abnormal finding when cancer is present (kappa = 0.52) and substantial agreement when cancer is not present (kappa = 0.62); BI-RADS was designed by the American College of Radiology (ACR) to provide the verbal uniformity to be used in descriptions of mammogram results, required for data submission to the ACR National Mammography Database (NMD), and to ensure concise reporting of breast-imaging findings among various practitioners and specialties.

On dictation, there may be reference to an ACR, a BI-RADS or an ACRBI-RADS classification or category related to findings. These are:
1 or N: normal;
2 or B: benign;
3 or P: probably benign;
4 or S: suspicious ;
5 or M: malignant.

BI-RADS Assessment Categories
0: Incomplete;
1: Negative;
2: Benign finding(s);
3: Probably benign;
4: Suspicious abnormality;
5: Highly suggestive of malignancy;
6: Known biopsy—proven malignancy.

Breast Composition Categories
1: Almost entirely fat;
2: Scattered fibroglandular densities;
3: Heterogeneously dense;
4: Extremely dense.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
All breast lesions were graded by two experienced ultrasound doctors and radiologists according to grading criteria of Breast Imaging Reporting and Data System (BI-RADS).
To reduce breast cancer mortality, the only evidence-based procedure available for screening is mammography.5 For standardised reporting of the mammographic findings Breast Imaging Reporting and Data System (BIRADS) is routinely used.6 However, a varying degree of agreement is seen among the radiologists for the assessment of breast density.7,8 Breast composition can be measured by area-based method in which the image of compressed and projected breast are taken and breast density is assessed by segmenting areas of the mammographic image.9 Because of the subjective nature of analysis, there is substantial inter-and intra-observer variability and it requires additional time even by an experienced radiologist.10
Predictors of interobserver agreement in breast imaging using the Breast Imaging Reporting and Data System. Breast Cancer Res Treat 2010;120(3):539-546.
Reporting is done based on the breast lexicon and every report is given a category of the BIRADS (Breast Imaging Reporting and Data System).
The speakers came from the USA, Canada and Australia, and all spoke a language only used by a minority of South African radiologists: BI-RADS (breast imaging reporting and data system).
This version electronically analyzes breast masses using the American College of Radiology's BI-RADS (Breast Imaging Reporting and Data System) categories.
CDC requests that radiologists report mammography results using categories specified in the Breast Imaging Reporting and Data System (BIRADS) of the American College of Radiology (3) and that laboratories report Pap smear results using categories from the Bethesda System (4).
The outcomes of the mammography were classified according to the American College of Radiology Breast Imaging Reporting and Data System (BIRADS).
Twelve board-certified radiologists trained on 200 tomosynthesis imaging cases were asked to score the digital mammography images as Breast Imaging Reporting and Data System (BIRADS) 0, 1, and 2, For those cases scored as a BIRADS 0, the radiologists were asked to give a forced BIRADS score of 1-5 indicating the likelihood of disease in that patient, and to assign a probability of malignancy score rating from 1 to 100.
Readers rated the mammograms on a 7-point malignancy scale and used the classification of the Breast Imaging Reporting and Data System (BIRADS).