Volume and landmark analysis: Comparison of MRI measurements obtained with an endorectal coil and with a phased-array coil Journal Article


Authors: Mazaheri, Y.; Afaq, A. A.; Jung, S. I.; Goldman, D. A.; Wang, L.; Aslan, H.; Zelefsky, M. J.; Akin, O.; Hricak, H.
Article Title: Volume and landmark analysis: Comparison of MRI measurements obtained with an endorectal coil and with a phased-array coil
Abstract: Aim To compare prostate volumes and distances between anatomical landmarks on MRI images obtained with a phased-array coil (PAC) only and with a PAC and an endorectal coil (ERC). Materials and methods Informed consent was waived for this Health Insurance Portability and Accountability Act-compliant study. Fifty-nine men underwent PAC-MRI and ERC-MRI at 1.5 (n = 3) or 3 T (n = 56). On MRI images, two radiologists independently measured prostate volume and distances between the anterior rectal wall (ARW) and symphysis pubis at the level of the verumontanum; ARW and symphysis pubis at the level of the mid-symphysis pubis; and bladder neck and mid-symphysis pubis. Differences between measurements from PAC-MRI and ERC-MRI were assessed with the Wilcoxon RANK SUM test. Inter-reader agreement was assessed using the concordance correlation coefficient (CCC). Results Differences in prostate volume between PAC-MRI and ERC-MRI [median: -0.75 mm3 (p = 0.10) and median: -0.84 mm3 (p = 0.06) for readers 1 and 2, respectively] were not significant. For readers 1 and 2, median differences between distances were as follows: -10.20 and -12.75 mm, respectively, ARW to symphysis pubis at the level of the verumontanum; -6.60 and -6.08 mm, respectively, ARW to symphysis pubis at the level of the mid-symphysis pubis; -3 and -3 mm respectively, bladder neck to mid-symphysis pubis. All differences in distance were significant for both readers (p 0.0005). Distances were larger on PAC-MRI (p 0.0005). Inter-reader agreement regarding prostate volume was almost perfect on PAC-MRI (CCC: 0.99; 95% CI: 0.98-1.00) and ERC-MRI (CCC: 0.99; 95% CI: 0.99-1.00); inter-reader agreement for distance measurements varied (CCCs: 0.54-0.86). Conclusion Measurements of distances between anatomical landmarks differed significantly between ERC-MRI and PAC-MRI, although prostate volume measurements did not. © 2014 The Royal College of Radiologists. Published by Elsevier Ltd. All rights reserved.
Keywords: adult; controlled study; aged; major clinical study; comparative study; nuclear magnetic resonance imaging; reproducibility; prostate specific antigen; image analysis; retrospective study; radiologist; rectum; bladder neck; nuclear magnetic resonance scanner; pubis symphysis; prostate volume; whole body mri; human; male; priority journal; article; anatomic landmark; anterior rectal wall; nuclear magnetic resonance scanner endorectal coil; nuclear magnetic resonance scanner phased array coil
Journal Title: Clinical Radiology
Volume: 70
Issue: 4
ISSN: 0009-9260
Publisher: W B Saunders Co Ltd  
Date Published: 2015-04-01
Start Page: 379
End Page: 386
Language: English
DOI: 10.1016/j.crad.2014.12.002
PROVIDER: scopus
PUBMED: 25554540
PMCID: PMC6777874
DOI/URL:
Notes: Export Date: 2 April 2015 -- Source: Scopus
Altmetric
Citation Impact
MSK Authors
  1. Michael J Zelefsky
    690 Zelefsky
  2. Hedvig Hricak
    382 Hricak
  3. Oguz Akin
    224 Akin
  4. Asim Ahmed Afaq
    13 Afaq
  5. Sungil Jung
    4 Jung
  6. Debra Alyssa Goldman
    132 Goldman
  7. Hulya Aslan
    1 Aslan