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Reconstructing Powder NQR Images with Real Gradient Coils

✍ Scribed by Srirama V. Swaminathan; B.H. Suits

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 74 KB
Volume: 138
Category: Article
ISSN: 1090-7807
DOI: 10.1006/jmre.1999.1724

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✦ Synopsis

Unlike NMR imaging, where only the components of the magnetic field gradients along the main applied field need be considered, all nonzero components of the gradients must be considered for NQR imaging of powder or polycrystalline materials. Any physically realizable gradient coil will have at least two nonzero components. Since the nonzero components are of comparable magnitude, image reconstruction will not be as straightforward as is found for NMR imaging. Here a practical NQR imaging reconstruction technique based on the use of standard techniques but using a nonrectilinear grid is demonstrated for physically realizable gradients. A two-dimensional image constructed using the 35 Cl NQR signal from a polycrystalline sample of NaClO 3 is presented to demonstrate the technique.

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