Quality assurance multicenter comparison of different MR scanners for quantitative diffusion-weighted imaging
| Autor: | Paola Mangili, G. Gobbi, Cristiano Biagini, Goffredo Princigalli, Lorenzo Nicola Mazzoni, Marco Giannelli, Luca Nocetti, Giacomo Belli, L. Orsingher, Danilo Scelfo, N. Oberhofer, Linhsia Noferini, Nicoletta Paruccini, S. Mazzocchi, A. Ciccarone, C. Fulcheri, E. Fabbri, A. Ciarmatori, Nicola Bertolino, G. Zatelli, Gina Belmonte, C. Gasperi, Silvano Filice, Gloria Vilches Freixas, Cesare Gori, S. Morzenti, Leonardo Tenori, G. Meliadò, Rosa A. Anoja, Roberto Sghedoni, S. Busoni, Fabiola Cretti, Mariagrazia Quattrocchi, Marco Esposito, A. Coniglio, Ileana Zucca, Claudio Luchinat, Adele Rinaldi, L. Fedeli, M. Betti, Roberto Tarducci |
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| Rok vydání: | 2015 |
| Předmět: |
Scanner
medicine.diagnostic_test business.industry Magnetic resonance imaging Repeatability Imaging phantom Standard deviation 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine medicine Effective diffusion coefficient Radiology Nuclear Medicine and imaging business Nuclear medicine Quality assurance 030217 neurology & neurosurgery Diffusion MRI |
| Zdroj: | Journal of Magnetic Resonance Imaging. 43:213-219 |
| ISSN: | 1053-1807 |
| Popis: | Purpose To propose a magnetic resonance imaging (MRI) quality assurance procedure that can be used for multicenter comparison of different MR scanners for quantitative diffusion-weighted imaging (DWI). Materials and Methods Twenty-six centers (35 MR scanners with field strengths: 1T, 1.5T, and 3T) were enrolled in the study. Two different DWI acquisition series (b-value ranges 0–1000 and 0–3000 s/mm2, respectively) were performed for each MR scanner. All DWI acquisitions were performed by using a cylindrical doped water phantom. Mean apparent diffusion coefficient (ADC) values as well as ADC values along each of the three main orthogonal directions of the diffusion gradients (x, y, and z) were calculated. Short-term repeatability of ADC measurement was evaluated for 26 MR scanners. Results A good agreement was found between the nominal and measured mean ADC over all the centers. More than 80% of mean ADC measurements were within 5% from the nominal value, and the highest deviation and overall standard deviation were 9.3% and 3.5%, respectively. Short-term repeatability of ADC measurement was found |
| Databáze: | OpenAIRE |
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