Accuracy of prostate measurements on MRI with and without an endorectal coil

• Published in: Clinical imaging Vol. 39; no. 1; pp. 85 - 88
• Main Authors: Chernyak, Victoria, Flusberg, Milana, Kurteva, Teodora, Ghavamian, Reza, Rozenblit, Alla M
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 2015; Elsevier Limited
• Subjects: Adult; Aged; Androgens; Coiling; Confidence intervals; Distortion; Edorectal coil; Humans; Magnetic Resonance Imaging - methods; Male; Mathematical analysis; Men; Middle Aged; Older people; Organ Size; Pathology; Placement; Prostate; Prostate - pathology; Prostate cancer; Prostate gland; Prostate measurement; Prostate MRI; Prostatic Neoplasms - pathology; Radicals; Radiology; Seminal Vesicles - pathology; Prostate gland; Prostate measurement; Edorectal coil; Prostate MRI
• ISSN: 0899-7071; 1873-4499
• DOI: 10.1016/j.clinimag.2014.09.003

Abstract Purpose To assess accuracy of prostate measurements with and without endorectal coil (ERC). Materials and 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. Conclusion 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.