title: A 45 to 55 MHz needle-based ultrasound system for invasive imaging.
abstract: The design, construction and fabrication of a high frequency needle-based ultrasound imaging system is described. A miniature lead zirconate titanate transducer was mounted opposite a parabolic mirror in a stainless steel needle. By inserting the needle into a tissue, a cross section image of the tissue can be made. Two needle probes were built, a 45 MHz 2.8 mm diameter probe with 125 microns lateral, 55 microns axial resolution and a 55 MHz 1.6 mm diameter probe with 105 microns lateral, 40 microns axial resolution. Preliminary phantom and in vitro tissue images demonstrate the feasibility of high frequency needle-based imaging.
authors.affiliation: Department of Medical Biophysics, University of Toronto, Ontario, Canada.
authors.forename: G R
authors.initials: GR
authors.lastname: Lockwood
authors.forename: L K
authors.initials: LK
authors.lastname: Ryan
authors.forename: F S
authors.initials: FS
authors.lastname: Foster
mesh_terms: D004867:Equipment Design; D005263:Femoral Artery / Q000000981:diagnostic imaging; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008953:Models, Anatomic; D009339:Needles; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation*