Composite pulses for time reversal in NMR imaging

Details Composite pulses for time reversal in NMR imaging Composite pulses for time reversal in NMR imaging

1984-02-17

1986-09-23

Krass, Errol A.

Boots, shoes, and leggings

324307, 324309, 364576, 364414, G06F 1552, G06F 1542

Patent

active

046139494

ABSTRACT:
Composite pulses are employed in NMR imaging for time-reversal of nuclear spins in a transverse planar region of a sample to produce spin-echo signals. The composite pulses comprise a sequence of pulses for producing a 90.degree. rotation of the spins about a first transverse axis, a 180.degree. rotation of the spins about a substantially orthogonal transverse axis, and a 90.degree. rotation of the nuclear spins about the first transverse axis. The composite pulses minimize time-reversal errors caused by static magnetic field and RF field inhomogeneities, and afford multiple spin-echo NMR imaging sequences.

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