Diffusion-weighted quantitative MRI of pleural abnormalities: Intra- and interobserver variability in the apparent diffusion coefficient measurements
| Autor: | Adriano Massimiliano, Priola, Sandro Massimo, Priola, Dario, Gned, Maria Teresa, Giraudo, Maria, Brundu, Luisella, Righi, Andrea, Veltri |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Adult
Male Observer Variation measurement variability Reproducibility of Results Middle Aged Pleural Diseases Sensitivity and Specificity Diffusion Magnetic Resonance Imaging pleura Humans apparent diffusion coefficient diffusion-weighted magnetic resonance imaging region of interest Female Aged Retrospective Studies |
| Popis: | To assess intra- and interobserver variability in the apparent diffusion coefficient (ADC) measurements of pleural abnormalities.Diffusion-weighted magnetic resonance imaging was performed in 34 patients to characterize pleural abnormalities, with a 1.5T unit at b values of 0/150/500/800 sec/mmAll methods demonstrated good (MSR, OSR) and excellent (WTV, TSOD, SS) intra- and interreader agreement, with best and worst repeatability in WTV (lower ICC, 0.977; higher CoV, 3.5%) and OSR (lower ICC, 0.625; higher CoV, 22.8%), respectively. The lower 95% confidence interval of ICC resulted in fair to moderate agreement for OSR (up to 0.379) and in excellent agreement for WTV, TSV, and SS (up to 0.918). ADC values of OSR and MSR were significantly lower compared to other methods (P0.001). The OSR and SS required less measurement time (10 and 21/22 sec, respectively) compared to the others (P0.0001), while the WTV required the longest measurement time (132/134 sec) (P0.0001).ADC measurements of pleural abnormalities are repeatable. The SS method has excellent repeatability, similar to WTV, but requires significantly less measurement time. Thus, its use should be preferred in clinical practice.4 Technical Efficacy: Stage 2 J. MAGN. RESON. IMAGING 2017;46:769-782. |
| Databáze: | OpenAIRE |
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