Analysis of a Nuclear Magnetic Resonance Blood Flowmeter for Pulsatile Flow

Joseph H. Battocletti, John H. Linehan, Sanford J. Larson, Anthony Sances, Robert L. Bowman, Vsevelod Kudravcev, William K. Genthe, Richard E. Halbach, Silas M. Evans

Research output: Contribution to journalLetterpeer-review

7 Scopus citations


Nuclear magnetic resonance (NMR) techniques have been applied to the measurement of steady or quasi-steady flow by using, principally, the tag-detect method. This paper describes a two-magnet NMR flowmeter that can be used to measure pulsatile flow. The pulsatile nature of the flow causes a pulsed magnetization of the fluid, which is detected by a flow-sensitive NMR detector. A parabolic velocity profile has been assumed. The results of theoretical computations closely approximate in vitro data from a 1.6-mm ID rigid tube with respect to the shape of the NMR signal and to the proportionality of the NMR signal amplitude to flow rate. Selected in vivo results are also presented.

Original languageEnglish (US)
Pages (from-to)403-407
Number of pages5
JournalIEEE Transactions on Biomedical Engineering
Issue number6
StatePublished - Nov 1972

ASJC Scopus subject areas

  • Biomedical Engineering


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