title: IMPROVING MAGNETIC RESONANCE RESOLUTION WITH SUPERVISED LEARNING.
abstract: Despite ongoing improvements in magnetic resonance (MR) imaging (MRI), considerable clinical and, to a lesser extent, research data is acquired at lower resolutions. For example 1 mm isotropic acquisition ofT1-weighted (T1-w) Magnetization Prepared Rapid Gradient Echo (MPRAGE) is standard practice, howeverT2-weighted (T2-w)-because of its longer relaxation times (and thus longer scan time)-is still routinely acquired with slice thicknesses of 2-5 mm and in-plane resolution of 2-3 mm. This creates obvious fundamental problems when trying to processT1-w andT2-w data in concert. We present an automated supervised learning algorithm to generate high resolution data. The framework is similar to the brain hallucination work of Rousseau, taking advantage of new developments in regression based image reconstruction. We present validation on phantom and real data, demonstrating the improvement over state-of-the-art super-resolution techniques.
authors.affiliation: Image Analysis and Communications Laboratory, The Johns Hopkins University.
authors.forename: Amod
authors.initials: A
authors.lastname: Jog
authors.affiliation: Image Analysis and Communications Laboratory, The Johns Hopkins University.
authors.forename: Aaron
authors.initials: A
authors.lastname: Carass
authors.affiliation: Image Analysis and Communications Laboratory, The Johns Hopkins University.
authors.forename: Jerry L
authors.initials: JL
authors.lastname: Prince
keywords: Image reconstruction; MRI; brain; regression; super-resolution