Adaptive Statistical Iterative Reconstruction-V: Impact on Image Quality in Ultralow-Dose Coronary Computed Tomography Angiography.
J Comput Assist Tomogr
; 40(6): 958-963, 2016.
Article
em En
| MEDLINE
| ID: mdl-27560012
ABSTRACT
OBJECTIVE:
The clinical utility of a latest generation iterative reconstruction algorithm (adaptive statistical iterative reconstruction [ASiR-V]) has yet to be elucidated for coronary computed tomography angiography (CCTA). This study evaluates the impact of ASiR-V on signal, noise and image quality in CCTA.METHODS:
Sixty-five patients underwent clinically indicated CCTA on a 256-slice CT scanner using an ultralow-dose protocol. Data sets from each patient were reconstructed at 6 different levels of ASiR-V. Signal intensity was measured by placing a region of interest in the aortic root, LMA, and RCA. Similarly, noise was measured in the aortic root. Image quality was visually assessed by 2 readers.RESULTS:
Median radiation dose was 0.49 mSv. Image noise decreased with increasing levels of ASiR-V resulting in a significant increase in signal-to-noise ratio in the RCA and LMA (P < 0.001). Correspondingly, image quality significantly increased with higher levels of ASiR-V (P < 0.001).CONCLUSIONS:
ASiR-V yields substantial noise reduction and improved image quality enabling introduction of ultralow-dose CCTA.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteção Radiológica
/
Doença da Artéria Coronariana
/
Interpretação de Imagem Radiográfica Assistida por Computador
/
Angiografia Coronária
/
Exposição à Radiação
/
Angiografia por Tomografia Computadorizada
Tipo de estudo:
Diagnostic_studies
/
Guideline
Limite:
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Ano de publicação:
2016
Tipo de documento:
Article