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Localized i n v i v o high‐resolution NMR imaging using gradient subencoding technique
Author(s) -
Cho Z. H.,
Jo J. M.
Publication year - 1991
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.596681
Subject(s) - resolution (logic) , optics , image resolution , physics , nuclear magnetic resonance , imaging phantom , materials science , computer science , artificial intelligence
A new spatial localization technique for i n v i v o high‐resolution imaging is presented here. In contrast to other localization techniques that use a series of rf pulses to define a volume of interest, only one rf pulse is utilized in the proposed method for selection of a region to be imaged. Instead of rf pulses for region selection, subencoding gradient pulses are used for the localization together with a convolution process on each phase‐encoding gradient by a set of additional gradients (e.g., y direction). Then the 2‐D localization is completed by restricting the bandwidth in the readout direction (e.g., x direction). The latter is simply achieved by using a low‐pass filter in the receiver system. By applying this technique on a human body, localized i n v i v o high‐resolution images are obtained for the knee with much improved resolution. 100×100‐μm in‐plane ( x , y plane) resolution images obtained from the human knee demonstrate that localized i n v i v o high‐resolution imaging for both human and animals is possible with an in‐plane resolution of below 100 μm.