Coronary CT Angiography with Knowledge-Based Iterative Model Reconstruction for Assessing Coronary Arteries and Non-Calcified Predominant Plaques
Korean Journal of Radiology
;
: 729-738, 2019.
Artigo
em Inglês
| WPRIM
| ID: wpr-741459
ABSTRACT
OBJECTIVE:
To assess the effects of iterative model reconstruction (IMR) on image quality for demonstrating non-calcific high-risk plaque characteristics of coronary arteries. MATERIALS ANDMETHODS:
This study included 66 patients (53 men and 13 women; aged 39–76 years; mean age, 55 ± 13 years) having single-vessel disease with predominantly non-calcified plaques evaluated using prospective electrocardiogram-gated 256-slice CT angiography. Paired image sets were created using two types of reconstruction hybrid iterative reconstruction (HIR) and IMR. Plaque characteristics were compared using the two algorithms. The signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the images and the CNR between the plaque and adjacent adipose tissue were also compared between the two reformatted methods.RESULTS:
Seventy-seven predominantly non-calcified plaques were detected. Forty plaques showed napkin-ring sign with the IMR reformatted method, while nineteen plaques demonstrated napkin-ring sign with HIR. There was no statistically significant difference in the presentation of positive remodeling, low attenuation plaque, and spotty calcification between the HIR and IMR reconstructed methods (all p > 0.5); however, there was a statistically significant difference in the ability to discern the napkin-ring sign between the two algorithms (χ2 = 12.12, p < 0.001). The image noise of IMR was lower than that of HIR (10 ± 2 HU versus 12 ± 2 HU; p < 0.01), and the SNR and CNR of the images and the CNR between plaques and surrounding adipose tissues on IMR were better than those on HIR (p < 0.01).CONCLUSION:
IMR can significantly improve image quality compared with HIR for the demonstration of coronary artery and atherosclerotic plaques using a 256-slice CT.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Doença da Artéria Coronariana
/
Processamento de Imagem Assistida por Computador
/
Angiografia
/
Tecido Adiposo
/
Estudos Prospectivos
/
Vasos Coronários
/
Aterosclerose
/
Placa Aterosclerótica
/
Tomografia Computadorizada Multidetectores
/
Razão Sinal-Ruído
Tipo de estudo:
Estudo observacional
/
Estudo prognóstico
Limite:
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Korean Journal of Radiology
Ano de publicação:
2019
Tipo de documento:
Artigo
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