Motion correction using coil arrays (MOCCA) for free-breathing cardiac cine MRI.
Magn Reson Med
; 66(2): 467-75, 2011 Aug.
Article
em En
| MEDLINE
| ID: mdl-21773986
ABSTRACT
In this study, we present a motion correction technique using coil arrays (MOCCA) and evaluate its application in free-breathing respiratory self-gated cine MRI. Motion correction technique using coil arrays takes advantages of the fact that motion-induced changes in k-space signal are modulated by individual coil sensitivity profiles. In the proposed implementation of motion correction technique using coil arrays self-gating for free-breathing cine MRI, the k-space center line is acquired at the beginning of each k-space segment for each cardiac cycle with 4 repetitions. For each k-space segment, the k-space center line acquired immediately before was used to select one of the 4 acquired repetitions to be included in the final self-gated cine image by calculating the cross correlation between the k-space center line with a reference line. The proposed method was tested on a cohort of healthy adult subjects for subjective image quality and objective blood-myocardium border sharpness. The method was also tested on a cohort of patients to compare the left and right ventricular volumes and ejection fraction measurements with that of standard breath-hold cine MRI. Our data indicate that the proposed motion correction technique using coil arrays method provides significantly improved image quality and sharpness compared with free-breathing cine without respiratory self-gating and provides similar volume measurements compared with breath-hold cine MRI.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Aumento da Imagem
/
Mecânica Respiratória
/
Artefatos
/
Imagem Cinética por Ressonância Magnética
/
Técnicas de Imagem de Sincronização Cardíaca
/
Coração
/
Magnetismo
Tipo de estudo:
Diagnostic_studies
/
Evaluation_studies
Limite:
Adult
/
Humans
Idioma:
En
Revista:
Magn Reson Med
Assunto da revista:
DIAGNOSTICO POR IMAGEM
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Estados Unidos