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Breast Biopsy: Multicenter Study of Radiofrequency Introducer with US-guided Handheld System—Initial Experience¹

¹ From the Department of Radiology, Hôpital du Saint-Sacrement, Québec City, Canada (N.D.); Sally Jobe Breast Center, Englewood, Colo (S.H.P.); Department of Radiology, Community General Hospital, Syracuse, NY (A.J.K.); and Seno Rx, Aliso Viejo, Calif (M.L.M.). From the 2001 RSNA scientific assembly. Received December 7, 2001; revision requested February 20, 2002; final revision received December 15, 2003; accepted January 5, 2004. Supported by SenoRx. Address correspondence to N.D., Ottawa Regional Women’s Breast Health Center, 200 Melrose Ave, Ottawa, ON, Canada KIY 4K7 (e-mail: nduchesne@ottawahospital.on.ca).

View larger version (84K): [in a new window]   Figure 1a. (a) RF introducer (large open arrow) with stainless steel-tip electrode (small open arrow) for delivery of RF energy to facilitate tissue penetration. In position in the breast, obturator (thick solid arrow) is removed from cannula (thin solid arrow) to allow insertion of probe of handheld breast biopsy system. (b) Outer cannula (open arrow) of RF introducer has longitudinal aperture (solid arrow) at distal end that was designed to mate with aperture in probe of handheld system.

View larger version (41K): [in a new window]   Figure 1b. (a) RF introducer (large open arrow) with stainless steel-tip electrode (small open arrow) for delivery of RF energy to facilitate tissue penetration. In position in the breast, obturator (thick solid arrow) is removed from cannula (thin solid arrow) to allow insertion of probe of handheld breast biopsy system. (b) Outer cannula (open arrow) of RF introducer has longitudinal aperture (solid arrow) at distal end that was designed to mate with aperture in probe of handheld system.

View larger version (176K): [in a new window]   Figure 2. US image (longitudinal, antiradial plane) obtained just before biopsy shows probe (small arrow) of handheld breast biopsy system inside cannula (large arrow) of RF introducer.

View larger version (16K): [in a new window]   Figure 3. Ease of penetration for fatty or fibroglandular breast composition (P = .25).

View larger version (22K): [in a new window]   Figure 4. Ease of penetration for dense breast composition (P < .001).