NUCLEAR MAGNETIC RESONANCE METHODS AND APPARATUS

摘要

A method and apparatus for determining the rate of flow of a liquid in a region of a body using a nuclear magnetic resonance technique. Nuclear magnetic resonance is excited firstly preferentially in a slice of the body which includes the region and then over the whole of the body. A period of time is allowed to elapse, and nuclear magnetic resonance is then excited preferentially in the slice. The free induction decay signal is then measured, and the signal is related to the state of flow of the liquid through the slice.