Real-time measurement and correction of both B0 changes and subject motion in diffusion tensor imaging using a double volumetric navigated (DvNav) sequence

• Published in: NeuroImage (Orlando, Fla.) Vol. 126; pp. 60 - 71
• Main Authors: Alhamud, A., Taylor, Paul A., van der Kouwe, Andre J.W., Meintjes, Ernesta M.
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.02.2016; Elsevier Limited
• Subjects: Acquisitions & mergers; Adult; B0 correction; Brain - anatomy & histology; Diffusion; Diffusion tensor imaging (DTI); Diffusion Tensor Imaging - methods; Diffusion Tensor Imaging - standards; Double volumetric navigators (DvNav); Echo-Planar Imaging - methods; Echo-Planar Imaging - standards; Humans; Male; Methods; Movement; Navigated diffusion sequence (vNav); Studies; The first-order shim (linear gradients); Zero-order shim (frequency); Zero-order shim (frequency); The first-order shim (linear gradients); Diffusion tensor imaging (DTI); Double volumetric navigators (DvNav); Navigated diffusion sequence (vNav); B0 correction

Diffusion tensor imaging (DTI) requires a set of diffusion weighted measurements in order to acquire enough information to characterize local structure. The MRI scanner automatically performs a shimming process by acquiring a field map before the start of a DTI scan. Changes in B0, which can occur t...