Data quality in fMRI and simultaneous EEG-fMRI.
MAGMA
; 28(1): 23-31, 2015 Feb.
Article
em En
| MEDLINE
| ID: mdl-24770631
ABSTRACT
OBJECT To evaluate functional magnetic resonance imaging (fMRI) and simultaneous electroencephalography (EEG)-fMRI data quality in an organization using several magnetic resonance imaging (MRI) systems. MATERIALS AND METHODS:
Functional magnetic resonance imaging measurements were carried out twice with a uniform gel phantom on five different MRI systems with field strengths of 1.5 and 3.0 T. Several image quality parameters were measured with automatic analysis software. For simultaneous EEG-fMRI, data quality was evaluated on 3.0 T systems, and the phantom results were compared to data on human volunteers.RESULTS:
The fMRI quality parameters measured with different MRI systems were on an acceptable level. The presence of the EEG equipment caused superficial artifacts on the phantom image. The typical artifact depth was 15 mm, and no artifacts were observed in the brain area in the images of volunteers. Average signal-to-noise ratio (SNR) reduction in the phantom measurements was 15 %, a reduction of SNR similar to that observed in the human data. We also detected minor changes in the noise of the EEG signal during the phantom measurement.CONCLUSION:
The phantom proved valuable in the successful evaluation of the data quality of fMRI and EEG-fMRI. The results fell within acceptable limits. This study demonstrated a repeatable method to measure and follow up on the data quality of simultaneous EEG-fMRI.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Garantia da Qualidade dos Cuidados de Saúde
/
Encéfalo
/
Mapeamento Encefálico
/
Imageamento por Ressonância Magnética
/
Imagens de Fantasmas
/
Eletroencefalografia
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Limite:
Humans
País/Região como assunto:
Europa
Idioma:
En
Revista:
MAGMA
Assunto da revista:
DIAGNOSTICO POR IMAGEM
Ano de publicação:
2015
Tipo de documento:
Article