A straightforward multiparametric quality control protocol for proton magnetic resonance spectroscopy: Validation and comparison of various 1.5â¯T and 3â¯T clinical scanner systems.
Phys Med
; 54: 49-55, 2018 Oct.
Article
em En
| MEDLINE
| ID: mdl-30337010
ABSTRACT
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 1.5â¯T and 3â¯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 20â¯mm) PRESS acquisitions with unsuppressed water signal and acquisition voxel position at isocenter as well as off-center, repeated 4/5 times within approximately 2â¯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)â¯Hz and 0.8 (0.3)â¯Hz for 3â¯T and 1.5â¯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 T2values were 1145 (50) ms and 1010 (95) ms for 1.5â¯T and 3â¯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 1.5â¯T and 3â¯T scanner systems.Palavras-chave
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Coleções:
01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Guideline
Idioma:
En
Ano de publicação:
2018
Tipo de documento:
Article