Magic-echo imaging

Figure 7 (A)T2e-magic-echo image of a piece of polycarbonate (see schematic) in which a crossed shearband has been created. (B) An image of a sample that has been stretched nearly to the breaking point The regions with high intensity correspond to areas of low molecular mobility. Figure reproduced with permission from Traub B, Hafner S, Maring D and Spiess HW (1998) In Bliimler P, Blumich B, Botto B and Fukushima E, Spatially Resolved Magnetic Resonance, Weinheim Wiley-VCH, p 191.

Hafner S, Demco D E and Kimmich R 1996 Magic echoes and NMR imaging of solids Solid State Nucl. Magn. Reson. 6 275-93... 

Fig. 24. Top Magic-echo sequence, TREV-16TS, for solid-state imaging with (a) ideally pulsed (b) nonideally pulsed and (c) sinusoidal field gradients. On-resonance RF irradiations along x and — x are sandwiched by 90° pulses (magic sandwich). The hatched magic sandwich consists of four magic sandwiches. Bottom Projections of the one-dimensional test sample (admantane powder) obtained with the TREV-16TS sequence (r = 30 ps) and the field gradients shown in Fig. 18. The RF field was set at 100 kHz. (Adapted from Matsui et al.296 with permission.)...

Fig. 7.3.2 Magic-echo pulse sequences for spectroscopic imaging and imaging of moments.

Multi-pulse sequences for line narrowing based on magic echoes represent another possibility to realize time-suspension. Such sequences are less difficult to implement than pulse sequences based on solid echoes and consequently, appear to be more popular for use in imaging. Therefore, they are treated separately in Section 8.8. 

For spectroscopic imaging with magic echoes the space encoding sequence can be appended by an MREV8 sequence for frequency encoding of the spectrum in the absence... 

Magic-echo phase-encoding solid-state imaging... 

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