title: CT-guided aspirations for the body: comparison of hand guidance with stereotaxis.
abstract: Forty computed tomography (CT)-assisted aspirations performed with only hand guidance were prospectively compared with 40 performed with a CT body-stereotaxic system. Although there was no statistically significant difference in lesion size and path length between the two groups, use of stereotaxis compared with hand guidance decreased by 75% the number of needle manipulations required to place a needle within a lesion. With the stereotaxic method, only 43 needle manipulations were required to confirm a needle placement in 40 lesions, with no lesion requiring more than two attempts. Use of stereotaxis decreased the number of localization scans by 80% and biopsy time by 50%. It is concluded that CT-guided needle placements with hand guidance are often inaccurate and, unless the lesion is large, require multiple needle manipulations to place a needle within the lesion. Stereotaxis-guided biopsies, on the other hand, decrease radiation exposure, biopsy time, and trauma from multiple needle punctures.
authors.affiliation: Allegheny-Singer Research Institute, Pittsburgh, PA 15212-9986.
authors.forename: G
authors.initials: G
authors.lastname: Onik
authors.forename: E R
authors.initials: ER
authors.lastname: Cosman
authors.forename: T H
authors.initials: TH
authors.lastname: Wells
authors.forename: H I
authors.initials: HI
authors.lastname: Goldberg
authors.forename: A A
authors.initials: AA
authors.lastname: Moss
authors.forename: P
authors.initials: P
authors.lastname: Costello
authors.forename: R A
authors.initials: RA
authors.lastname: Kane
authors.forename: W I
authors.initials: WI
authors.lastname: Hoddick
authors.forename: B
authors.initials: B
authors.lastname: Demas
mesh_terms: D001707:Biopsy, Needle / Q000379:methods*; D006801:Humans; D011446:Prospective Studies; D013238:Stereotaxic Techniques; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*