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Computer‐controlled flow simulator for MR flow studies
Author(s) -
Frayne Richard,
Holdsworth David W.,
Gowman Linda M.,
Rickey Daniel W.,
Drangova Maria,
Fenster Aaron,
Rutt Brian K.
Publication year - 1992
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880020522
Subject(s) - pulsatile flow , flow (mathematics) , waveform , simulation , mechanics , piston (optics) , flow measurement , computer science , physics , optics , telecommunications , medicine , radar , wavefront , cardiology
A novel computer‐controlled flow simulator for use in magnetic resonance (MR) flow experiments was evaluated. The accuracy in constant‐flow mode was better than 1%. The accuracy in pulsatile‐flow mode was found to be dependent on the interconnecting tubing. The short‐term and long‐term repro‐ducibilities of pulsatile waveforms were <0.4 mL/sec (1 standard deviation). Increased response times due to the lengths of tubing required in MR flow experiments were surmounted by using a modified tubing configuration and pre‐compensated waveforms. Piston reversal was found not to cause major difficulties in MR flow experiments.