title: Halfpipe coaxial cannula for self-contained vacuum-assisted biopsy systems: feasibility in a pig breast model.
abstract: OBJECTIVE
  The purpose of this article is to discuss the development of a dedicated halfpipe coaxial cannula for stereotactic vacuum-assisted biopsy. We evaluated the system by retrieving 18 copper targets from a pig breast model in the upright position via vertical and lateral approaches.
  
  
  CONCLUSIONS
  Sampling was successful in 15 of 18 cases. Errors occurred only in superficial lesions biopsied via the vertical approach. The halfpipe coaxial cannula shows promise for improving positioning accuracy, avoiding target dislocation, and obviating repeated needle repositioning.
authors.affiliation: Diagnostic Breast Centre, St. Elisabeth Hospital, Furtwänglestr. 2/2, D-69121 Heidelberg, Germany. tobias.teubner@gmx.de
authors.forename: Tobias
authors.initials: T
authors.lastname: Teubner
authors.forename: Matthias F
authors.initials: MF
authors.lastname: Häfner
authors.forename: Max
authors.initials: M
authors.lastname: Schimmele
authors.forename: Joachim
authors.initials: J
authors.lastname: Teubner
mesh_terms: D000818:Animals; D001706:Biopsy / Q000379:methods*; D001940:Breast / Q000473:pathology*; D004867:Equipment Design; D005240:Feasibility Studies; D008327:Mammography; D023421:Models, Animal; D013238:Stereotaxic Techniques; D013552:Swine; D014618:Vacuum