A new phase coding method using a slice selection gradient for high speed flow velocity measurement in NMR tomography

Publisher Website
Google Scholar
Abstract
A new phase coding method using a selection gradient for high speed NMR flow velocity measurement is introduced and discussed. To establish a phase-velocity relationship of flow under the slice selection gradient and spin-echo RF pulse, the Bloch equation was numerically solved under the assumption that only one directional flow exists, i.e. in the direction of slice selection. Details of the numerical solution of the Bloch equation and techniques related to the numerical computations are also given. Finally, using the numerical calculation, high speed flow velocity measurement was attempted and found to be in good agreement with other complementary controlled measurements.