Variable field of view for spatial resolution improvement in continuously moving table magnetic resonance imaging

Houchun H. Hu, Ananth J. Madhuranthakam, David G. Kruger, James F. Glockner, Stephen J. Riederer

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

An approach is described in which the field of view (FOV) along the Y (right/left) phase encoding direction can be dynamically altered during a continuously moving table (CMT) coronal acquisition for extended FOV MRI. We hypothesize that with this method, regions of the anatomy exhibiting significantly different lateral widths can be imaged with a matching local FOVY, thereby improving local lateral spatial resolution, k-space raw data from the variable-FOV CMT acquisition do not allow simple Fourier reconstruction due to the presence of a mixture of phase encodes sampled at different ΔkY intervals. In this work, we employ spline interpolation to re-register the mixed data set onto a uniformly sampled k-space grid. Using this interpolation scheme, we present phantom and peripheral contrast-enhanced MR angiography results demonstrating an approximate 45% improvement in local lateral spatial resolution for continuously moving table acquisitions.

Original languageEnglish (US)
Pages (from-to)146-151
Number of pages6
JournalMagnetic Resonance in Medicine
Volume54
Issue number1
DOIs
StatePublished - Jul 2005

Keywords

  • Continuously moving table
  • Peripheral contrast-enhanced MRA
  • Spatial resolution
  • Variable field of view
  • k-space interpolation

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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