NMR Fresnel transform imaging technique using a quadratic nonlinear field gradient
作者:
Yoshifumi Yamada,
Kunio Tanaka,
Zenmon Abe,
期刊:
Review of Scientific Instruments
(AIP Available online 1992)
卷期:
Volume 63,
issue 11
页码: 5348-5358
ISSN:0034-6748
年代: 1992
DOI:10.1063/1.1143401
出版商: AIP
数据来源: AIP
摘要:
A new NMR imaging technique using a quadratic nonlinear field gradient is described. The center position of the nonlinear field gradient where the field intensity is minimum is moved spatially at a fixed amount in each imaging pulse sequence to produce nonlinear phase encoding as a function of position. A NMR image is reconstructed from the collected data by the computer data processing. The principle of this technique and many experimental results using a low field imaging system operating at 0.0192 T are presented. Theoretical and experimental comparison of theS/Nof the image in this technique with that of the conventional Fourier imaging technique are made and the results show that both techniques have almost the sameS/N. Moreover, the theoretical and experimental results show that this technique has a feasibility of a spatially localized imaging without using a conventional localization technique such as the use of the selective excitation in the presence of a linear field gradient.
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