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Magn Reson Med. 2013 Apr;69(4):920-30. doi: 10.1002/mrm.24339. Epub 2012 Jun 12.

Automated prescription of oblique brain 3D magnetic resonance spectroscopic imaging.

Author information

  • 1Surbeck Laboratory of Advanced Imaging, Department of Radiology and Biomedical Imaging, University of California San Francisco, San Francisco, CA 94158-2330, USA. eugene.ozhinsky@ucsf.edu

Abstract

Two major difficulties encountered in implementing Magnetic Resonance Spectroscopic Imaging (MRSI) in a clinical setting are limited coverage and difficulty in prescription. The goal of this project was to automate completely the process of 3D PRESS MRSI prescription, including placement of the selection box, saturation bands and shim volume, while maximizing the coverage of the brain. The automated prescription technique included acquisition of an anatomical MRI image, optimization of the oblique selection box parameters, optimization of the placement of outer-volume suppression saturation bands, and loading of the calculated parameters into a customized 3D MRSI pulse sequence. To validate the technique and compare its performance with existing protocols, 3D MRSI data were acquired from six exams from three healthy volunteers. To assess the performance of the automated 3D MRSI prescription for patients with brain tumors, the data were collected from 16 exams from 8 subjects with gliomas. This technique demonstrated robust coverage of the tumor, high consistency of prescription and very good data quality within the T2 lesion.

PMID:
22692829
PMCID:
PMC3443494
DOI:
10.1002/mrm.24339
[PubMed - indexed for MEDLINE]
Free PMC Article
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