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J Magn Reson Imaging. 2011 Dec;34(6):1277-84. doi: 10.1002/jmri.22746. Epub 2011 Sep 23.

MR spectroscopy of the human prostate using surface coil at 3 T: metabolite ratios, age-dependent effects, and diagnostic possibilities.

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  • 1Department of Radiology, University Hospital, Uppsala, Sweden. jan.weis@radiol.uu.se

Abstract

PURPOSE:

To measure prostate spectra of healthy volunteers using a surface coil, to demonstrate age-dependent effects, and to investigate diagnostic possibilities for prostate cancer detection.

MATERIALS AND METHODS:

Single-voxel and 2D magnetic resonance spectroscopic imaging (MRSI) spectra of 51 healthy volunteers with biopsy-proven prostate carcinoma of 20 patients for comparison were measured and processed using the LCModel. The mean normalized spectra and mean metabolite-to-citrate intensity ratios were computed.

RESULTS:

Metabolite-to-citrate ratios of healthy volunteers were lower in the older group (>51 years) than in the younger group (<45 years). The peripheral zone (PZ) revealed a lower metabolite-to-citrate intensity ratio than the central gland (CG). Age-related differences in metabolite-to-citrate ratio were insignificant in the voxels with predominantly CG tissue, whereas significant differences were found in the PZ. Sensitivity in detecting prostate cancer by single-voxel spectroscopy (SVS) and 2D MRSI was 75% and 80%, respectively.

CONCLUSION:

SVS and 2D MRSI of the prostate at 3 T, using a surface coil, are useful in situations when insertion of the endorectal coil into the rectum is difficult or impossible. Our findings of age-dependent effects may be of importance for the analysis of patient spectra.

Copyright © 2011 Wiley Periodicals, Inc.

PMID:
21954046
[PubMed - indexed for MEDLINE]
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