title: Turbine flow sensor for volume-flow rate verification in MR.
abstract: A turbine flow sensor for MR flow experiments has been evaluated using reference volume-flow rate measurements obtained using an electromagnetic (EM) flow meter measurements and simultaneous phase contrast (PC) MR acquisitions. After calibration, the device was found to have accuracy (compared with the EM flow meter), linearity, and precision of better than +/- 1%, +/- 3.5%, 3.5%, respectively, in constant flow mode (0 to 30 ml s-1). The frequency response of the flow sensor was flat (within +/- 10%) up to 13.9 Hz. Volume-flow rate measurements on constant and simulated physiologic flow waveforms were in close agreement with both the electromagnetic (EM) flow meter and the gated MR PC estimates.
authors.affiliation: Department of Medical Biophysics, University of Western Ontario, London, Canada.
authors.forename: R
authors.initials: R
authors.lastname: Frayne
authors.forename: D W
authors.initials: DW
authors.lastname: Holdsworth
authors.forename: R F
authors.initials: RF
authors.lastname: Smith
authors.forename: R
authors.initials: R
authors.lastname: Kasrai
authors.forename: J P
authors.initials: JP
authors.lastname: Larsen
authors.forename: B K
authors.initials: BK
authors.lastname: Rutt
mesh_terms: D002138:Calibration; D002339:Carotid Arteries / Q000502:physiology; D003198:Computer Simulation; D004867:Equipment Design; D005583:Fourier Analysis; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation; D007259:Infrared Rays; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008954:Models, Biological; D011312:Pressure; D011673:Pulsatile Flow; D012039:Regional Blood Flow / Q000502:physiology; D015203:Reproducibility of Results; D012212:Rheology / Q000295:instrumentation*; D012399:Rotation; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation