作者
Luca Fedeli, Giacomo Belli, Antonio Ciccarone, Angela Coniglio, Marco Esposito, Marco Giannelli, Lorenzo Nicola Mazzoni, Luca Nocetti, Roberto Sghedoni, Roberto Tarducci, Luisa Altabella, Eleonora Belligotti, Matteo Benelli, Margherita Betti, Rocchina Caivano, Andrea Chiappiniello, Sara Cimolai, Fabiola Cretti, Christian Fulcheri, Chiara Gasperi, Mara Giacometti, Fabrizio Levrero, Domenico Lizio, Marta Maieron, Simona Marzi, Lorella Mascaro, Silvia Mazzocchi, Sabrina Morzenti, Linhsia Noferini, Nadia Oberhofer, Maria Grazia Quattrocchi, Alessandra Ricci, Adriana Taddeucci, Leonardo Tenori, Claudio Luchinat, Gianni Gobbi, Cesare Gori, Simone Busoni
发表日期
2018/11/1
期刊
Physica Medica
卷号
55
页码范围
135-141
出版商
Elsevier
简介
Purpose
To propose an MRI quality assurance procedure that can be used for routine controls and multi-centre comparison of different MR-scanners for quantitative diffusion-weighted imaging (DWI).
Materials and methods
44 MR-scanners with different field strengths (1 T, 1.5 T and 3 T) were included in the study. DWI acquisitions (b-value range 0–1000 s/mm2), with three different orthogonal diffusion gradient directions, were performed for each MR-scanner. All DWI acquisitions were performed by using a standard spherical plastic doped water phantom. Phantom solution ADC value and its dependence with temperature was measured using a DOSY sequence on a 600 MHz NMR spectrometer. Apparent diffusion coefficient (ADC) along each diffusion gradient direction and mean ADC were estimated, both at magnet isocentre and in six different position 50 mm away from isocentre, along positive and …
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L Fedeli, G Belli, A Ciccarone, A Coniglio, M Esposito… - Physica Medica, 2018
