1. Reproducibility of apparent diffusion coefficient measurement in normal prostate peripheral zone at 1.5T MRI
- Author
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Au Hoang-Dinh, Trung Nguyen-Quang, Lenh Bui-Van, Christelle Gonindard-Melodelima, Rémi Souchon, and Olivier Rouvière
- Subjects
Male ,Adult ,Young Adult ,Diffusion Magnetic Resonance Imaging ,Radiological and Ultrasound Technology ,Prostate ,Humans ,Reproducibility of Results ,Prostatic Neoplasms ,Radiology, Nuclear Medicine and imaging ,General Medicine ,Magnetic Resonance Imaging ,Healthy Volunteers - Abstract
The purpose of this study was to quantify the influence of factors of variability on apparent diffusion coefficient (ADC) estimation in the normal prostate peripheral zone (PZ).Fifty healthy volunteers underwent in 2017 (n = 17) or 2020 (n = 33) two-point (0, 800 s/mm²) prostate diffusion-weighted imaging in the morning on 1.5 T scanners A and B from different manufacturers. Additional five-point (50, 150, 300, 500, 800 s/mm²) acquisitions were performed on scanner B in the morning and evening. ADC was measured in PZ at midgland using ADC maps reconstructed with various b-value combinations. ADC distributions from 2017 and 2020 were compared using Wilcoxon rank sum test. ADC obtained in the same volunteers were compared using Bland Altman methodology. The 95% confidence interval upper limit of the repeatability/reproducibility coefficient defined the lowest detectable ADC difference.Forty-nine participants with a mean age of 24.6 ± 3.8 [SD] years (range: 21-37 years) were finally included. ADC distributions from 2017 and 2020 were not significantly different and were combined. Despite high individual variability, there was no significant bias (10 × 10The MRI scanner, the lowest b-value used and the period of the day induce substantial variability in ADC computation.
- Published
- 2022