Introduction: The objective of this study was to determine the impact of an academic course of mammography in the categorization of breast calcifications. Materials and methods: A double - blind study was carried out to establish the variation in the predictive positive values (PPV) of each of the morphologic descriptors of calcifications according to the BIRADS 4ed, after an academic course of mammography, divided in 12 sessions of 30 minutes. The database of a prior study was used, in which two radiologist classified 108 mammographic studies of patients with biopsy made diagnosis. A new categorization of the calcifications was performed using the BIRADS descriptors. Also we calculate the intra and inter-observer variation using Cohen’s kappa, sensibility and specificity. Results: For calcifications with high probability of malignancy (pleomorphic and fine linear), a PPV of 41 and 40% was calculated, with a mild increase comparing with prior categorization. Kappa for inter-observer variability was 0,305, indicating weak concordance, also with a minor improvement after the course, initial kappa was 0,260. The intraobserver kappa for the first radiologist was 0,471 and for the second 0,400, weak. Conclusion: A short academic course allows to slightly improve the inter-observer kappa in the categorization of breast calcifications using BIRAD 4ed, and the PVV of calcifications with high probability of malignancy, no significative change is observed for low or intermediate probability calcifications.