Electricity: measuring and testing – Particle precession resonance – Determine fluid flow rate
Patent
1993-11-30
1997-01-07
O'Shea, Sandra L.
Electricity: measuring and testing
Particle precession resonance
Determine fluid flow rate
324307, 324309, 1286533, G01V 300, G01V 314, A61B 50265, A61B 5055
Patent
active
055920845
ABSTRACT:
The invention relates to a method for examination of motion of material employing magnetic resonance imaging methods. A magnetic field, which is referred as an auxiliary field is applied over the first area of the object, this auxiliary field is arranged to get smaller as one moves from the first area to the second area, referred as the area to be examined. Partially simultaneously with the auxiliary field a radio frequency pulse, AHP-pulse, is applied on the object, the frequency of the AHP-pulse is the Larmor-frequency corresponding to the strength of the magnetic field in the area to be examined. The length of the AHP-pulse corresponds to the time, which is required for the material to move from the first area to the area to be examined.
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Fry J. J.
Gurin T. B.
Haynes Mack
O'Shea Sandra L.
Picker Nordstar Inc.
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