title: A guidance device for CT-guided procedures.
abstract: A device was designed to facilitate placement of biopsy needles with computed tomographic guidance. The device consists of a hollow, clear plastic disk filled halfway with fluid and a central stem with a groove for the needle. When the device is rotated, the air-fluid level points to the corresponding angle marked on the side of the disk. In a phantom study, 17 of 20 passes were within +/- 3 degrees of the anticipated angle of entry, and the remaining three were within +/- 5 degrees. The device was also used in 14 patients; the resultant angle of entry was within +/- 3 degrees of the anticipated angle.
authors.affiliation: Department of Radiology, St Louis University Medical Center.
authors.forename: G D
authors.initials: GD
authors.lastname: Reyes
mesh_terms: D001707:Biopsy, Needle / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D014057:Tomography, X-Ray Computed