title: Accuracy of a bistatic scattering substitution technique for calibration of focused receivers.
abstract: A recent method for calibrating single-element, focused passive cavitation detectors (PCD) compares bistatic scattering measurements by the PCD and a reference hydrophone. Here, effects of scatterer properties and PCD size on frequency-dependent receive calibration accuracy are investigated. Simulated scattering from silica and polystyrene spheres was compared for small hydrophone and spherically focused PCD receivers to assess the achievable calibration accuracy as a function of frequency, scatterer size, and PCD size. Good agreement between measurements was found when the scatterer diameter was sufficiently smaller than the focal beamwidth of the PCD; this relationship was dependent on the scatterer material. For conditions that result in significant disagreement between measurements, the numerical methods described here can be used to correct experimental calibrations.
authors.affiliation: Biomedical Engineering Program, University of Cincinnati, Cincinnati, Ohio 45267, USA richkt@mail.uc.edu, doug.mast@uc.edu.
authors.forename: Kyle T
authors.initials: KT
authors.lastname: Rich
authors.affiliation: Biomedical Engineering Program, University of Cincinnati, Cincinnati, Ohio 45267, USA richkt@mail.uc.edu, doug.mast@uc.edu.
authors.forename: T Douglas
authors.initials: TD
authors.lastname: Mast
mesh_terms: D000465:Algorithms; D002138:Calibration; D004867:Equipment Design; D008863:Microspheres; D019047:Phantoms, Imaging; D011137:Polystyrenes; D012815:Signal Processing, Computer-Assisted; D012822:Silicon Dioxide; D013016:Sound; D014159:Transducers; D014465:Ultrasonics / Q000295:instrumentation*
chemical_list: D011137:Polystyrenes; D012822:Silicon Dioxide