Development and Optimization of a NovelPassive Shim System for Human OrbitofrontalCortex Imaging at 4T MRI
Mohan Lal Jayatilake,
Sahan Vijithananda,
ing-Huei Lee
Abstract:Background: The orbitofrontal cortex (OFC) area plays a critical role in humanbrain functions. However, susceptibility differences between paranasal sinuses andnasal cavity tissues often cause local field variations in the OFC region duringMRI, resulting in image distortions and signal loss. This paper introduces asubject-friendly neck passive shim solution aimed at enhancing field homogeneityin the brain, specifically in the OFC region.
Methods: Utilizing 3D gradient-echo pulse sequences, main magnetic field … Show more
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