Symmetric echo acquisition for absolute-value display in solid-state NMR imaging.
A method of solid-state NMR imaging that permits echo Fourier transformation (FT) has been devised using a magic echo train. The echo FT imaging can be implemented simply by modifying the gradient pulse sequence in the previous magic echo imaging (TREV-16TS) so that the one-dimensional k-space trajectory follows the sampling points which are symmetric about the k origin. The implemented ability of echo FT improves the performance of the magic echo imaging: the sensitivity gained by radical2, the phase correction is made unnecessary, and the digital resolution is doubled. One- and two-dimensional imaging experiments have been conducted on some solid samples, confirming the improved performance and revealing a TREV-16TS adjustment parameter that is critical for the successful echo FT imaging.
Institute of Applied Physics, University of Tsukuba, Tsukuba, Ibaraki, 305-8573, Japan. matsui@bk.tsukuba.ac.jp
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Matsui
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Saito
D017352:Echo-Planar Imaging / Q000295:instrumentation*; D004867:Equipment Design; D005583:Fourier Analysis; D006801:Humans; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation*; D019047:Phantoms, Imaging; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*