Modification of the Carr-Purcell sequence for single-shot echo-planar imaging.
An artifact caused by the RF field inhomogeneity in echo-planar imaging (EPI) with the CPMG sequence is analyzed. A modified sequence is presented, using 90 degrees phase alternation of the pi pulses, which suppresses the spurious components of the signal. Thus the phase cycling procedure can be avoided and the pi-pulsed EPI experiment can be reduced to a single shot.
Hennel
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Institute of Physics, Jagiellonian University, Krakow, Poland.
D016477:Artifacts; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008961:Models, Structural