Until I can get an answer from a Radiologist I'll throw this question out for discussion.
Using the nipple as the reference point for the midline of the breast, a cluster of calcifications may shift above or below the midline when viewed from the true lateral (side) mammogram vs the craniocaudral (viewed from above) mammagram. In other words, the cluster of calcifications may appear above or below the midline of the breast depending upon the direction of compression during a mammogram.
Which mammography view does the Radiologist use when he describes the calcifications in the Interpretation and Impression portions of the Mammography report if calcifications are in the "upper quandrant" in the lateral view and in the "lower quadrant" in the craniocaudral view.