Nuclear magnetic resonance systems

Details Nuclear magnetic resonance systems Nuclear magnetic resonance systems

G - Physics

01

N

324/1

G01N 24/08 (2006.01) G01R 33/565 (2006.01)

Patent

CA 1242762

ABSTRACT OF THE DISCLOSURE A Fourier transformation imaging technique is used for NMR imaging. Spins in a selected plane are excited by selective RF pulses and an associated Gz gradient and the selected spins are subjected to three mutually orthogonal gradients which provide the resonance signal with spatial resolution along each axis produced by phase encoding. The signals sampled and read out in the presence of a readout gradient are associated with spatial frequencies determined by the applied gradient fields. The Fourier transformation of the spin echo signals obtained from repetition of the pulse sequences gives a two-dimensional image. The linear phase-encoding gradient is applied starting with a preliminary phase-encoding gradient which maximizes the spin-echo signals. -18-

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