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Magn Reson Med. 2015 Dec;74(6):1690-7. doi: 10.1002/mrm.25531. Epub 2014 Dec 2.

Continuously moving table MRI with golden angle radial sampling.

Author information

1
Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, Tennessee, USA.
2
Department of Radiology and Radiological Sciences, Vanderbilt University, Nashville, Tennessee, USA.
3
Department of Biomedical Engineering, Vanderbilt University, Nashville, Tennessee, USA.

Abstract

PURPOSE:

Continuously moving table (CMT) MRI is a high throughput technique that has multiple applications in whole-body imaging. In this work, CMT MRI based on golden angle (GA, 111.246° azimuthal step) radial sampling is developed at 3 Tesla (T), with the goal of increased flexibility in image reconstruction using arbitrary profile groupings.

THEORY AND METHODS:

CMT MRI with GA and linear angle (LA) schemes were developed for whole-body imaging at 3T with a table speed of 20 mm/s. Imaging was performed in phantoms and a human volunteer with extended z fields of view of up to 1.8 meters. Four separate LA and a single GA scan were performed to enable slice reconstructions at four different thicknesses.

RESULTS:

GA CMT MRI produced high image quality in phantoms and humans and allowed complete flexibility in reconstruction of slices with arbitrary slice thickness and position from a single data set. LA CMT MRI was constrained by predetermined parameters, required multiple scans and suffered from stair step artifacts that were not present in GA images.

CONCLUSION:

GA sampling provides a robust flexible approach to CMT whole-body MRI with the ability to reconstruct slices at arbitrary positions and thicknesses from a single scan.

KEYWORDS:

continuously moving table MRI; golden angle radial; whole body MRI

PMID:
25461600
PMCID:
PMC4452468
DOI:
10.1002/mrm.25531
[Indexed for MEDLINE]
Free PMC Article

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