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Single-Coil Surface Imaging Using a Radiofrequency Field Gradient

✍ Scribed by Nathalie Baril; Eric Thiaudière; Bruno Quesson; Christophe Delalande; Paul Canioni; Jean-Michel Franconi

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

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✦ Synopsis

A method for in-plane imaging of large objects as compared to the RF coil is proposed based on the use of a single specially designed surface coil, without using B 0 gradients. A constant B 1 gradient was generated along the main axis of a ladder-shaped coil, and RF-encoding along the direction of the gradient made it possible to obtain spin-density profiles. Successive acquisitions of profiles obtained by translation of the NMR coil resulted in distorted images-due to the presence of non-zero gradients perpendicular to the constant gradient-that were successfully processed using a mathematical treatment based on linear combinations of calculated altered images from single-pixel objects. © 2000 Academic Press IMAGING IN THE ROTATING FRAME AND IMAGE PROCESSING PseudoFIDs (14) were acquired with the main axis of the coil parallel to z. Fourier transform of individual pseudoFID should give the spin-density profiles as a function of z. The 2D image in the ( x, z) plane would then be created by shifting the

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