An NMR technique for rapid measurement of flow.
We present a one-scan method for determining fluid flow velocity within a few milliseconds in the presence of a static field gradient, and without the need of multiple scans. A few RF-pulses populate a series of coherence pathways, each of which exhibits a phase shift that is proportional to fluid velocity. These coherence pathways produce spin echoes separated in the time domain, thus eliminating the need for phase cycling.
Song
Yi-Qiao
YQ
Schlumberger-Doll Research, 36 Old Quarry Road, Ridgefield, CT 06877, USA. ysong@slb.com
Scheven
Ulrich M
UM
D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D008962:Models, Theoretical; D011846:Radio Waves; D012212:Rheology; D012815:Signal Processing, Computer-Assisted