Radiology, Vol 195, 533-538, Copyright © 1995 by Radiological Society of North America

ARTICLES

MR imaging-guided breast intervention: experience with two systems

U Fischer, R Vosshenrich, W Doler, A Hamadeh, JW Oestmann and E Grabbe
Department of Radiology, Georg-August Universitat Gottingen, Germany.

PURPOSE: To evaluate two different systems for magnetic resonance (MR) imaging-guided breast intervention. MATERIALS AND METHODS: Thirty-four patients with 34 lesions detected exclusively with contrast material- enhanced MR imaging underwent 51 interventional procedures (23 needle biopsies and 28 preoperative wire localizations) with two different systems. An add-on device for surface coils was used in 25 cases, and a dedicated single breast biopsy coil was used in 26. For needle biopsies, material was aspirated with nonmagnetic 19.5-gauge needles. For preoperative localizations, nonmagnetic hook wires were used. RESULTS: Surgical excision or follow-up verified the cytologic findings in 19 of the 23 cases sampled for biopsy. Cytologic diagnosis was impossible in three of the 23 cases. One technical failure occurred with the biopsy coil. Open biopsy performed after MR imaging-guided localization successfully removed 26 of the 28 lesions. One missed carcinoma was found at repeat localization and removed. One technical failure occurred with the biopsy coil. In that case, the lesion was close to the chest wall. CONCLUSION: Both systems are suitable for fine- needle biopsy and preoperative localization of lesions seen exclusively on MR images.

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