Rationale and Objectives
To compare prostate morphology, image quality, and diagnostic performance of 1.5-T
endorectal coil magnetic resonance (MR) imaging (MRI) and 3.0-T nonendorectal coil
MRI in patients with prostate cancer.
Materials and Methods
MR images obtained of 83 patients with prostate cancer using 1.5-T MRI systems with
an endorectal coil were compared to images collected from 83 patients with a 3.0-T
MRI system. Prostate diameters were measured, and image quality was evaluated by one
American Board of Radiology (ABR)–certified radiologist (reader 1) and one ABR-certified
diagnostic medical physicist (reader 2). The likelihood of the presence of peripheral
zone cancer in each sextant and local extent was rated and compared to histopathologic
findings.
Results
Prostate anterior–posterior diameter measured by both readers was significantly shorter
with 1.5-T endorectal MRI than with 3.0-T MRI. The overall image quality score difference
was significant only for reader 1. Both readers found that the two MRI systems provided
a similar diagnostic accuracy in cancer localization, extraprostatic extension, and
seminal vesicle involvement.
Conclusions
Nonendorectal coil 3.0-T MRI provides prostate images that are natural in shape and
that have comparable image quality to those obtained at 1.5 T with an endorectal coil,
but not superior diagnostic performance. These findings suggest an opportunity exists
for improving technical aspects of the 3.0-T prostate MRI.
Key Words
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Article info
Publication history
Published online: January 08, 2015
Accepted:
November 10,
2014
Received:
February 11,
2014
Footnotes
Financial Support: This study was supported in part by a grant from the National Institutes of Health (U01CA080098-14, American College of Radiology Imaging Network Young Investigator Initiative Project Subaward #1117), a grant from the National Institutes of Health (R21CA156945), and a grant from the American Urological Association Foundation Research Scholars Program and EUSA Pharma (USA), Inc.
Identification
Copyright
© 2015 AUR. Published by Elsevier Inc. All rights reserved.
