CT-guided preoperative needle localization of MR imaging-detected mammographically occult lesions

R esearch has shown that dynamic high-resolution MR imaging of the breast using a dedicated breast coil and IV gadoliniumcan clinically and mammographically detect occult breast carcinoma [ I 1; delineate the extent of disease in many mammographically detectable or palpable cancers [2]; identify many primary breast lesions in patients presenting with an unknown primary or metastatic axillary lymphadenopathy [3]; and characterize a mammographically or sonographicallydetected lesion as benign or malignant [4]. MR imaging of the breast has the potential to detect breast cancer earlier than mammography and/or physical examina-