Inter-reader agreement of the ESUR score for prostate MRI using in-bore MRI-guided biopsies as the reference standard
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The recent European Society of Urogenital Radiology (ESUR) guidelines for evaluation and reporting of prostate multiparametric magnetic resonance imaging (mp-MRI) include the Prostate Imaging Reporting and Data System (PI-RADS). The aim of this study was to investigate the inter-reader agreement of this scoring system.
One hundred and sixty-four lesions in 67 consecutive patients with elevated prostate-specific antigen and previously negative trans-rectal ultrasound (TRUS)-guided biopsy were scored retrospectively by three blinded readers using PI-RADS. Mp-MRI was performed at 3 T using T2-weighted, diffusion-weighted and dynamic contrast-enhanced imagings (T2WI, DWI, DCE-MRI). Histology of all lesions was obtained by in-bore MRI-guided biopsy. Cohen’s kappa statistics were calculated for all readers.
Inter-reader agreement for all lesions was good to moderate (T2WI, κ = 0.55; DWI, κ = 0.64; DCE-MRI, κ = 0.65). For tumour lesions it was good (T2WI, κ = 0.66; DWI, κ = 0.80; DCE-MRI, κ = 0.63) and for benign lesions moderate to good (T2WI, κ = 0.46; DWI, κ = 0.52; DCE-MRI, κ = 0.67). Using an overall PI-RADS score with a threshold of ≥10, we achieved a sensitivity of 85.7 %, and negative predictive value of 90.1 % for biopsied lesions.
PI-RADS score shows good to moderate inter-reader agreement and enables standardised evaluation of prostate mp-MRI, with high sensitivity and negative predictive value.
• The European Society of Urogenital Radiology recently published guidelines for prostate MRI.
• We have evaluated inter-reader agreement of ESUR scoring for multiparametric prostate MRI.
• PI-RADS shows good to moderate inter-reader agreement and is clinically applicable.
• PI-RADS achieves in our series high sensitivity and negative predictive value for biopsied lesions.
• PI-RADS can be used as standardised scoring system in prostate cancer detection.
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- Inter-reader agreement of the ESUR score for prostate MRI using in-bore MRI-guided biopsies as the reference standard
Volume 23, Issue 11 , pp 3185-3190
- Cover Date
- Print ISSN
- Online ISSN
- Springer Berlin Heidelberg
- Additional Links
- Prostate cancer
- Prostate MRI
- MRI-guided biopsy
- Industry Sectors
- Author Affiliations
- 1. Medical Faculty, Department of Diagnostic and Interventional Radiology, University Dusseldorf, Moorenstr. 5, 40225, Dusseldorf, Germany
- 2. Medical Faculty, Department of Urology, University Dusseldorf, Moorenstr. 5, 40225, Dusseldorf, Germany