Postbiopsy confirmation of MR-detected lesions biopsied using ultrasound.

OBJECTIVE: The purpose of this article is to outline a quick and effective method of confirming MR-sonographic correlation for lesions detected with MRI but percutaneously biopsied using ultrasound.
CONCLUSION: Ensuring that a lesion seen on targeted ultrasound is the same as that detected at MRI can be difficult. For benign concordant lesions, a mismatch may only be discovered at 6-month postbiopsy MRI follow-up. However, lesion correlation can be established on the same day as biopsy by obtaining a single unenhanced T1-weighted non-fat-saturated pulse sequence just after percutaneous ultrasound-guided biopsy. Scanning time is less than 4 minutes. Postbiopsy changes and the biopsy clip are easily seen and help verify MR-sonographic lesion correlation.