Electricity: measuring and testing – Particle precession resonance – Determine fluid flow rate
Patent
1993-02-26
1994-05-24
Tokar, Michael J.
Electricity: measuring and testing
Particle precession resonance
Determine fluid flow rate
324309, G01V 300
Patent
active
053152484
ABSTRACT:
A nuclear magnetic resonance imaging for measuring a speed of a flowing target object, capable of determining the speed of the flowing target object accurately, even for the high speed flowing target object. Timings for an application of a pre-saturation pulse to a saturation plane producing a saturated portion within the flowing target object and an execution of an imaging pulse sequence to collect NMR signals from a desired imaging region containing a saturation plane and the saturated portion are controlled to realize a single slice multi-phase pulse sequence, at each phase of which an application of the pre-saturation pulse is followed by an execution of the desired imaging pulse sequence. The speed of the flowing target object is then determined by measuring a distance between the saturated portion and the saturation plane in each reconstructed NMR image, and dividing the measured distance by a time interval between an application of the pre-saturation pulse and a reception of the NMR signals in the single slice multi-phase pulse sequence.
REFERENCES:
patent: 4849697 (1989-07-01), Cline et al.
patent: 5034694 (1991-07-01), Sattin et al.
patent: 5225779 (1993-07-01), Parker et al.
patent: 5245282 (1993-09-01), Mugler, III et al.
Kabushiki Kaisha Toshiba
Tokar Michael J.
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