BI-RADS US:Macrocalcifcations are coarse calcifications that are 0.5mm or greater in size. As in other areas of the body, macrocalcifications will attenuate the acoustic beam and cause acoustic shadowing.
comment
TIRADS: When calcifications become large enough to result in posterior acoustic shadowing, they should be considered acrocalcifications. Macrocalcifications may be irregular in shape.