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MR-guided Vacuum-assisted Breast Biopsy: Accuracy of Targeting and Success in Sampling in a Phantom Model¹

¹ From the Department of Radiology, University of Washington Medical Center, Seattle, Wash (C.D.L.); Seattle Cancer Care Alliance, 825 Eastlake Ave E, G4–830, Seattle, WA 98109-1023 (C.D.L.); and Department of Radiology, Columbia University, New York, NY (T.A.). From the 2002 RSNA scientific assembly. Received July 21, 2003; revision requested October 3; revision received November 10; accepted January 12, 2004. Supported by an unrestricted grant from Ethicon Endo-Surgery, Cincinnati, Ohio, with full control by the authors for experimentation and data reporting. Address correspondence to C.D.L. (e-mail: lehman@seattlecca.org).

An 11-gauge MR-compatible system was designed for use in magnetic resonance vacuum-assisted breast biopsy. The system uses a detachable needle with minimal artifact to allow imaging after placement and before biopsy to confirm lesion location. A phantom study involving 16 biopsies of lesions smaller than 10 mm was conducted to assess the performance of this system. Fifteen (94%) of 16 biopsies resulted in successful lesion sampling. Eighty-five percent of all core samples contained specimen materials targeted lesion material. Further research to evaluate the efficiency, accuracy, and safety of this system in a patient population is recommended.

© RSNA, 2004

Index terms: Breast, biopsy, 00.1261 • Breast, MR, 00.1214 • Magnetic resonance (MR), experimental studies • Magnetic resonance (MR), guidance, 00.1214, 00.1261 • Phantoms

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