Premium
Theoretical analysis of the two‐coil method for measuring fluid flow using nuclear magnetic resonance
Author(s) -
Devine R. A. B.,
Clarke L. P.,
Vaughan S.,
Serafini A.
Publication year - 1982
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595127
Subject(s) - laminar flow , nuclear magnetic resonance , flow (mathematics) , signal (programming language) , flow measurement , electromagnetic coil , turbulence , fluid dynamics , flow velocity , mechanics , plug flow , detector , physics , computational physics , computer science , optics , quantum mechanics , programming language
A theoretical study of the application of pulsed nuclear magnetic resonance (NMR) to the measurement of fluid flow has been made. Calculations of detector signal line shapes, for a two‐coil NMR laboratory experiment, were performed using a computer to determine the appropriate choice of flow signature. Results of calculations are presented showing the sensitivity of the method to various experimental parameters. The position of the received peak signal, in time, was found to correlate directly with mean flow velocity. However, the shape of the received signal was observed to depend markedly upon the state of flow, i.e., laminar, turbulent (plug). Hence, accurate determinations of flow required a knowledge of flow type. The theoretical calculations provided a better understanding of the potential of NMR for measuring fluid or blood flow.