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The Nutation Spin Echo and Its Use for Localized NMR

✍ Scribed by Ioan Ardelean; Rainer Kimmich; Andreas Klemm

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
187 KB
Volume
146
Category
Article
ISSN
1090-7807

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✦ Synopsis

A suitably matched combination of unidirectional gradient pulses of the radio frequency amplitude B 1 and of the main magnetic field B 0 produces an unconventional type of spin echo, the nutation echo. The echo signal becomes volume selective if the gradients to be matched are inhomogeneously distributed in space. An example is a combination of a constant B 0 gradient and the inhomogeneous B 1 gradient of a surface coil. We suggest a method for localized NMR on this basis. Nutation echoes can also be used to map the spatial distribution of B 1 gradients of an arbitrary radio frequency coil geometry with the aid of a small probe sample.

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