A straightforward multiparametric quality control protocol for proton magnetic resonance spectroscopy: Validation and comparison of various 1.5 T and 3 T clinical scanner systems
| Autor: | Roberto Tarducci, F. Levrero, Marco Giannelli, G. Gobbi, Lorenzo Nicola Mazzoni, Giacomo Belli, Luca Nocetti, S. Busoni, Intercomparison in Mr, Marco Carnì, A. Ricci, N. Oberhofer, Andrea Nitrosi, A. Coniglio, S. Morzenti, L. M. Valastro, Alessandro Bellini, Marco Esposito, Davide D’Urso, Rocchina Caivano, Luisa Altabella, C. Gasperi, Luca Binotto, A. Ciccarone, Paola Mangili, Cesare Gori, Nicoletta Parruccini, Roberto Sghedoni, L. Fedeli, S. Cimolai, Alessandra Toncelli |
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| Rok vydání: | 2018 |
| Předmět: |
Quality Control
MRS Scanner Coefficient of variation Proton Magnetic Resonance Spectroscopy Biophysics General Physics and Astronomy computer.software_genre Standard deviation Imaging phantom 030218 nuclear medicine & medical imaging Physics and Astronomy (all) 03 medical and health sciences 0302 clinical medicine Voxel Nuclear Medicine and Imaging Magnetic resonance spectroscopy Radiology Nuclear Medicine and imaging Mathematics Protocol (science) business.industry Phantoms Imaging Isocenter MR scanner systems Quality assurance Radiology Nuclear Medicine and Imaging General Medicine 030220 oncology & carcinogenesis Radiology business Nuclear medicine computer |
| Zdroj: | Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB). 54 |
| ISSN: | 1724-191X |
| Popis: | Purpose The aim of this study was to propose and validate across various clinical scanner systems a straightforward multiparametric quality assurance procedure for proton magnetic resonance spectroscopy (MRS). Methods Eighteen clinical 1.5 T and 3 T scanner systems for MRS, from 16 centres and 3 different manufacturers, were enrolled in the study. A standard spherical water phantom was employed by all centres. The acquisition protocol included 3 sets of single (isotropic) voxel (size 20 mm) PRESS acquisitions with unsuppressed water signal and acquisition voxel position at isocenter as well as off-center, repeated 4/5 times within approximately 2 months. Water peak linewidth (LW) and area under the water peak (AP) were estimated. Results LW values [mean (standard deviation)] were 1.4 (1.0) Hz and 0.8 (0.3) Hz for 3 T and 1.5 T scanners, respectively. The mean (standard deviation) (across all scanners) coefficient of variation of LW and AP for different spatial positions of acquisition voxel were 43% (20%) and 11% (11%), respectively. The mean (standard deviation) phantom T2 values were 1145 (50) ms and 1010 (95) ms for 1.5 T and 3 T scanners, respectively. The mean (standard deviation) (across all scanners) coefficients of variation for repeated measurements of LW, AP and T2 were 25% (20%), 10% (14%) and 5% (2%), respectively. Conclusions We proposed a straightforward multiparametric and not time consuming quality control protocol for MRS, which can be included in routine and periodic quality assurance procedures. The protocol has been validated and proven to be feasible in a multicentre comparison study of a fairly large number of clinical 1.5 T and 3 T scanner systems. |
| Databáze: | OpenAIRE |
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