The study of diagnostic accuracy of prospectively electrocardiogram-triggered high-pitch spiral acquisition using Flash dual-source CT for the assessment of coronary stenoses / 中华放射学杂志
Chinese Journal of Radiology
; (12): 49-53, 2012.
Article
em Zh
| WPRIM
| ID: wpr-417802
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WPRO
ABSTRACT
Objectives To prospectively investigate the diagnostic accuracy,image quality and radiation doses of prospectively ECG-triggered high-pitch spiral acquisition computed tomography coronary angiography (CTCA) using Flash dual-source CT for the diagnosis of significant coronary stenoses.Methods Seventy-three patients underwent both CTCA and CCA.CTCA was performed using a Flash dual-source CT system with data acquisition at a high-pitch of 3.4.CCA served as the standard of reference.Radiation dose values were calculated using the dose-length product.Results There were 925 vessel segments in 73 patients.(1)Diagnostic accuracy the sensitivity,specificity and positive and negative predictive values were 93.2% (164/176),96.4% (722/749),85.9% (164/191),98.4% (722/734) for segment assessment and 98.4% ( 123/125 ),87.4% ( 83/95 ),91.1% ( 123/135 ),97.6% ( 83/85 ) for vessel assessment and 100% (44/44),89.7% ( 26/29 ),93.6% ( 44/47 ),100% ( 26/26 ) for patient assessment.( 2 ) Image quality there were 2 coronary segments of right coronary artery and one segment of left circumflex artery with non-diagnostic image quality.There was no non-diagnostic image quality in left anterior descending artery.(3) Radiation dose the effective radiation dose was ( 1.14 ± 0.10) mSv.Conclusions CTCA using the prospectively ECG-triggered high-pitch spiral mode of the Flash dual-source CT system is associated with high diagnostic accuracy for the assessment of coronary artery stenoses at low dose.
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WPRIM
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Revista:
Chinese Journal of Radiology
Ano de publicação:
2012
Tipo de documento:
Article