The study of diagnostic accuracy of prospectively electrocardiogram-triggered high-pitch spiral acquisition using Flash dual-source CT for the assessment of coronary stenoses
10.3760/cma.j.issn.1005-1201.2012.01.012
- VernacularTitle:大螺距双源CT前瞻性心电门控扫描评价冠状动脉狭窄的临床研究
- Author:
Kai SUN
;
Ruijuan HAN
;
Lijun MA
;
Lijun WANG
;
Zhiqing WANG
;
Cheng GUO
;
Dongmei ZHAO
;
Gang WANG
- Publication Type:Journal Article
- Keywords:
Coronary stenosi;
Coronary angiography;
Tomography,X-ray computed;
Radiation dosage;
Diagnosis
- From:
Chinese Journal of Radiology
2012;46(1):49-53
- CountryChina
- Language:Chinese
-
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.
