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• W2791850353 abstract "Background The incremental value of dynamic contrast‐enhanced (DCE) imaging in localizing radiorecurrent prostate cancer is uncertain. Purpose To assess the added‐value of DCE imaging to the combination T 2 ‐weighted imaging (T 2 W)+diffusion‐weighted imaging (DWI) in detecting locally radiorecurrent prostate cancer (PCa), by radiologists with different levels of experience. Study Type Analytic retrospective study. Population In all, 52 men with biological suspected PCa recurrence after radiotherapy were retrospectively included. Field Strength/Sequence All men underwent prostatic MRI (1.5T or 3T), including T 2 W, DWI, and DCE imagings, before biopsies. Assessment Two junior (6 months' experience) and two senior readers (more than 3 years' experience) independently assigned a Likert score for each prostatic sextant on T 2 W+DW+DCE imagings, then on T 2 W+DW imagings, 4 weeks later. Statistical Tests The reference standard was prostatic biopsies. For two levels of positivity of Likert score, 3/5 and 4/5, sensitivity, specificity, area under the receiver operating curve (AUC), and interreader agreement were compared. Results T 2 W+DWI+DCE and T 2 W+DWI imaging had similar AUC at lobe and sextant level (0.853–0.946 vs. 0.819–0.955, P from 0.071–0.534). Using a Likert score ≥4/5, T 2 W+DWI+DCE significantly improved the sensitivity for junior readers at the patient, lobe, and sextant level (40–80% vs. 22–66%, P < 0.0001–0.041). Sensitivity was not significantly modified with DCE imaging for senior readers (54–95% vs. 50–91%, P from 0.074–1). Specificity was not modified for all readers (50–100% vs. 50%–100%, P from 0.134–1). DCE imaging improved interreader agreement for a Likert score ≥4/5 (kappa from 0.6–0.73 vs. 0.38–0.73). Data Conclusion The addition of DCE imaging did not significantly improve accuracy in recurrent PCa detection after radiotherapy, whatever the level of experience of the readers. However, the addition of DCE imaging slightly improved the sensitivity for less‐experienced readers and increased their diagnostic confidence. Level of Evidence : 3 Technical Efficacy : Stage 2 J. Magn. Reson. Imaging 2018;48:1012–1023." @default.
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• W2791850353 date "2018-03-08" @default.
• W2791850353 modified "2023-10-13" @default.
• W2791850353 title "Dynamic contrast‐enhanced imaging in localizing local recurrence of prostate cancer after radiotherapy: Limited added value for readers of varying level of experience" @default.
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• W2791850353 doi "https://doi.org/10.1002/jmri.25991" @default.
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