title: Accuracy of prostate measurements on MRI with and without an endorectal coil.
abstract: OBJECTIVE
  To assess accuracy of prostate measurements with and without endorectal coil (ERC).
  
  
  METHODS
  Anteroposterior (AP), transverse (TX) and craniocaudal (CC) measurements were recorded from 49 prostate magnetic resonance images (MRIs) done both with and without ERC. Prostate weight was calculated as follows: AP*TX*CC*π/6. Prostate dimensions and weight were obtained from radical prostatectomy pathology report.
  
  
  RESULTS
  After ERC placement, AP decreased by 0.71 cm [95% confidence interval (CI) 0.80-0.61], TX and CC increased by 0.26 cm (95% CI 0.18-0.33) and 0.25 cm (95% CI 0.16-0.35), respectively. Agreement between weight on pathology and MR was excellent: intraclass correlation coefficient (ICC) without ERC=0.96, ICC with ERC=0.90.
  
  
  CONCLUSIONS
  Although ERC distorts measurements and despite a tendency to underestimate the prostate weight, absolute agreement between prostate weight on pathology and MRI is excellent, both with and without ERC.
authors.affiliation: Department of Radiology, Montefiore Medical Center. Electronic address: vchernya@montefiore.org.
authors.forename: Victoria
authors.initials: V
authors.lastname: Chernyak
authors.affiliation: Department of Radiology, Montefiore Medical Center.
authors.forename: Milana
authors.initials: M
authors.lastname: Flusberg
authors.affiliation: Department of Urology, Montefiore Medical Center.
authors.forename: Teodora
authors.initials: T
authors.lastname: Kurteva
authors.affiliation: Department of Urology, Montefiore Medical Center.
authors.forename: Reza
authors.initials: R
authors.lastname: Ghavamian
authors.affiliation: Department of Radiology, Montefiore Medical Center.
authors.forename: Alla M
authors.initials: AM
authors.lastname: Rozenblit
mesh_terms: D000328:Adult; D000368:Aged; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009929:Organ Size; D011467:Prostate / Q000473:pathology*; D011471:Prostatic Neoplasms / Q000473:pathology*; D012669:Seminal Vesicles / Q000473:pathology*
keywords: Edorectal coil; Prostate MRI; Prostate gland; Prostate measurement