Intra‐ and interreader reproducibility of PI‐RADSv2: A multireader study

Background The Prostate Imaging Reporting and Data System version 2 (PI‐RADSv2) has been in use since 2015; while interreader reproducibility has been studied, there has been a paucity of studies investigating the intrareader reproducibility of PI‐RADSv2. Purpose To evaluate both intra‐ and interrea...

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Bibliographic Details
Published in:Journal of magnetic resonance imaging 2019-06, Vol.49 (6), p.1694-1703
Main Authors: Smith, Clayton P., Harmon, Stephanie A., Barrett, Tristan, Bittencourt, Leonardo K., Law, Yan Mee, Shebel, Haytham, An, Julie Y., Czarniecki, Marcin, Mehralivand, Sherif, Coskun, Mehmet, Wood, Bradford J., Pinto, Peter A., Shih, Joanna H., Choyke, Peter L., Turkbey, Baris
Format: Article
Language:English
Subjects:
Adult
Aged
Aged, 80 and over
Algorithms
Biopsy
Biopsy - methods
Contrast Media
Correlation coefficient
Correlation coefficients
Diffusion Magnetic Resonance Imaging
Field strength
Humans
Image-Guided Biopsy
Lesions
Magnetic Resonance Imaging
Male
Mathematical analysis
Medical imaging
Middle Aged
MRI
Multiparametric Magnetic Resonance Imaging
NMR
Nuclear magnetic resonance
Observer Variation
PI‐RADS
Population (statistical)
Population studies
Prostate
Prostate - pathology
Prostate cancer
Prostate-Specific Antigen - analysis
Prostatic Neoplasms - diagnostic imaging
reader reproducibility
Readers
Reference Standards
Reproducibility
Reproducibility of Results
Retrospective Studies
Statistical analysis
Statistical tests
Ultrasonography
Ultrasound
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Summary:Background The Prostate Imaging Reporting and Data System version 2 (PI‐RADSv2) has been in use since 2015; while interreader reproducibility has been studied, there has been a paucity of studies investigating the intrareader reproducibility of PI‐RADSv2. Purpose To evaluate both intra‐ and interreader reproducibility of PI‐RADSv2 in the assessment of intraprostatic lesions using multiparametric magnetic resonance imaging (mpMRI). Study Type Retrospective. Population/Subjects In all, 102 consecutive biopsy‐naïve patients who underwent prostate MRI and subsequent MR/transrectal ultrasonography (MR/TRUS)‐guided biopsy. Field Strength/Sequences Prostate mpMRI at 3T using endorectal with phased array surface coils (TW MRI, DW MRI with ADC maps and b2000 DW MRI, DCE MRI). Assessment Previously detected and biopsied lesions were scored by four readers from four different institutions using PI‐RADSv2. Readers scored lesions during two readout rounds with a 4‐week washout period. Statistical Tests Kappa (κ) statistics and specific agreement (Po) were calculated to quantify intra‐ and interreader reproducibility of PI‐RADSv2 scoring. Lesion measurement agreement was calculated using the intraclass correlation coefficient (ICC). Results Overall intrareader reproducibility was moderate to substantial (κ = 0.43–0.67, Po = 0.60–0.77), while overall interreader reproducibility was poor to moderate (κ = 0.24, Po = 46). Readers with more experience showed greater interreader reproducibility than readers with intermediate experience in the whole prostate (P = 0.026) and peripheral zone (P = 0.002). Sequence‐specific interreader agreement for all readers was similar to the overall PI‐RADSv2 score, with κ = 0.24, 0.24, and 0.23 and Po = 0.47, 0.44, and 0.54 in T2‐weighted, diffusion‐weighted imaging (DWI), and dynamic contrast‐enhanced (DCE), respectively. Overall intrareader and interreader ICC for lesion measurement was 0.82 and 0.71, respectively. Data Conclusion PI‐RADSv2 provides moderate intrareader reproducibility, poor interreader reproducibility, and moderate interreader lesion measurement reproducibility. These findings suggest a need for more standardized reader training in prostate MRI. Level of Evidence: 2 Technical Efficacy: Stage 2
ISSN:1053-1807
1522-2586
1522-2586
DOI:10.1002/jmri.26555