Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1998-04-07
2000-06-27
Oda, Christine K.
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
324309, G01V 300
Patent
active
060811188
ABSTRACT:
Method and apparatus for increased accuracy of an image of object density pixel values obtained by forming linear combinations thereof. A measured variable M is related to an integration of the actual object density .rho. over space q by a transform function F, i.e., M(t)=.intg.F(t, q).rho.(q)dq, and an estimated object density .rho.* is obtained by an approximate inversion of the transform function, i.e., .rho.*(q)=.SIGMA.E(t,q)M(t), where the sum is over the samples taken. (In the case of magnetic resonance imaging, M is the magnetization induced in a coil transverse to the main magnetization coil, the transform function F(t,q) includes sinusoidal components, and the inversion function G includes an inverse Fourier transform.) Therefore, the estimated object density .rho.* is related to the actual object density .rho. by
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Oda Christine K.
Shaw Laurence J.
Shrivastav Brij B.
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