Optimizing the Imaging Protocol for Ex Vivo Coronary Artery Wall Using High-Resolution MRI: An Experimental Study on Porcine and Human
Korean Journal of Radiology
;
: 581-588, 2013.
Artigo
em Inglês
| WPRIM
| ID: wpr-174749
ABSTRACT
OBJECTIVE:
To optimize the MR imaging protocol for coronary arterial wall depiction in vitro and characterize the coronary atherosclerotic plaques. MATERIALS ANDMETHODS:
MRI examination was prospectively performed in ten porcine hearts in order to optimize the MR imaging protocol. Various surface coils were used for coronary arterial wall imaging with the same parameters. Then, the image parameters were further optimized for high-resolution coronary wall imaging. The signal-noise ratio (SNR) and contrast-noise ratio (CNR) of images were measured. Finally, 8 human cadaver hearts with coronary atherosclerotic plaques were prospectively performed with MRI examination using optimized protocol in order to characterize the coronary atherosclerotic plaques.RESULTS:
The SNR and CNR of MR image with temporomandibular coil were the highest of various surface coils. High-resolution and high SNR and CNR for ex vivo coronary artery wall depiction can be achieved using temporomandibular coil with 512 x 512 in matrix. Compared with histopathology, the sensitivity and specificity of MRI for identifying advanced plaques were type IV-V (lipid, necrosis, fibrosis), 94% and 95%; type VI (hemorrhage), 100% and 98%; type VII (calcification), 91% and 100%; and type VIII (fibrosis without lipid core), 100% and 98%, respectively.CONCLUSION:
Temporomandibular coil appears to be dramatically superior to eight-channel head coil and knee coil for ex vivo coronary artery wall imaging, providing higher spatial resolution and improved the SNR. Ex vivo high-resolution MRI has capability to distinguish human coronary atherosclerotic plaque compositions and accurately classify advanced plaques.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Suínos
/
Doença da Artéria Coronariana
/
Imageamento por Ressonância Magnética
/
Aumento da Imagem
/
Estudos Prospectivos
/
Sensibilidade e Especificidade
/
Vasos Coronários
/
Diagnóstico Diferencial
/
Modelos Animais de Doenças
/
Placa Aterosclerótica
Tipo de estudo:
Estudo diagnóstico
/
Estudo observacional
/
Estudo prognóstico
Limite:
Aged80
/
Animais
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Korean Journal of Radiology
Ano de publicação:
2013
Tipo de documento:
Artigo
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