title: Registration of surface structures using airborne focused ultrasound.
abstract: A low-cost measuring system, based on a personal computer combined with standard equipment for complex measurements and signal processing, has been assembled. Such a system increases the possibilities for small hospitals and clinics to finance advanced measuring equipment. A description of equipment developed for airborne ultrasound together with a personal computer-based system for fast data acquisition and processing is given. Two air-adapted ultrasound transducers with high lateral resolution have been developed. Furthermore, a few results for fast and accurate estimation of signal arrival time are presented. The theoretical estimation models developed are applied to skin surface profile registrations.
authors.affiliation: Division of Signal Processing, Luleå University of Technology, Sweden.
authors.forename: N
authors.initials: N
authors.lastname: Sundström
authors.forename: P O
authors.initials: PO
authors.lastname: Börjesson
authors.forename: N G
authors.initials: NG
authors.lastname: Holmer
authors.forename: L
authors.initials: L
authors.lastname: Olsson
authors.forename: H W
authors.initials: HW
authors.lastname: Persson
mesh_terms: D006801:Humans; D008838:Microcomputers; D012815:Signal Processing, Computer-Assisted; D012867:Skin / Q000000981:diagnostic imaging*; D013499:Surface Properties; D014159:Transducers; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*