A NEW NEEDLE SYSTEM FOR PREOPERATIVE LOCA LIZATION AND CORE BIOPSIES OF SUSPICIOUS BREAST-LESIONS IDENTIFIED BY MAGNETIC-RESONANCE-IMAGING

Purpose: Examinations of a new needle system for localisation and core biopsies of suspicious breast lesions, detected by MRI alone, were pe rformed. It was investigated whether this new needle system could redu ce and avoid artifacts. Material and methods: The new needle system wa s examined by Spin Echo Sequence and a Fast Gradient Echo Sequence on Magnetom Impact, 1.0 Tesla (in vitro-examinations). The sizes of the c oaxial needle system on the MR images were examinated on various slice thicknesses and with several wires in this needle system. Results: In the Spin Echo Sequence the measured size of the coaxial needle is the same as it's really size. In the Fast Gradient Echo Sequence the meas ured size is about the double of the really size. Conclusion: The pres ented coaxial system will allow improved visualisation for both preope rative localisation and core biopsy.