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High resolution T2‐weighted imaging of the human brain using surface coils and an analytical reception profile correction
Author(s) -
Moyher Susan E.,
Wald Lawrence L.,
Nelson Sarah J,
Hallam Danial,
Dillon William P.,
Norman David,
Vigneron Daniel B.
Publication year - 1997
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880070310
Subject(s) - image resolution , phased array , resolution (logic) , high resolution , sensitivity (control systems) , intensity (physics) , fast spin echo , human brain , biomedical engineering , magnetic resonance imaging , visualization , materials science , optics , computer science , nuclear magnetic resonance , physics , artificial intelligence , geology , medicine , remote sensing , radiology , telecommunications , engineering , electronic engineering , psychiatry , antenna (radio)
High spatial resolution T2‐weighted MR images of the human brain were obtained at 1.5 T. An optimized fast spin‐echo (FSE) sequence and 1.5 g/cm gradients were used to obtain T2‐weighted images in 4 to 9 minutes with an in‐plane resolution of .27 mm and slice thicknesses from 1.5 to 3 mm. Phased arrays of surface coils were used as receivers, providing increased sensitivity but image intensities dependent on the reception profile of the coils. This image nonuniformity was removed by analyzing the data with a theoretical intensity correction algorithm developed in this laboratory. The FSE sequences, the specialized phased arrays of surface coils, and the intensity correction algorithm allowed improved visualization of nerves within the inner auditory canals and surface anatomy of the cerebral cortex. It is expected that this technique will be useful for clinical applications that require high resolution imaging of small, superficial structures of the brain.