Diagnostic accuracy of coronary CT angiography using 3rd-generation dual-source CT and automated tube voltage selection: Clinical application in a non-obese and obese patient population.

Autor:	Mangold, Stefanie, Wichmann, Julian, Schoepf, U., Caruso, Damiano, Tesche, Christian, Steinberg, Daniel, Varga-Szemes, Akos, Stubenrauch, Andrew, Bayer, Richard, Biancalana, Matthew, Nikolaou, Konstantin, Cecco, Carlo, Wichmann, Julian L, Schoepf, U Joseph, Steinberg, Daniel H, Stubenrauch, Andrew C, Bayer, Richard R 2nd, De Cecco, Carlo N
Předmět:	CORONARY angiography ANGIOGRAPHY CARDIAC imaging COMPUTED tomography ARTERIOGRAPHY HEART OBESITY RADIATION doses BODY mass index RETROSPECTIVE studies
Zdroj:	European Radiology; Jun2017, Vol. 27 Issue 6, p2298-2308, 11p
Abstrakt:	Purpose: To investigate diagnostic accuracy of 3rd-generation dual-source CT (DSCT) coronary angiography in obese and non-obese patients.Methods: We retrospectively analyzed 76 patients who underwent coronary CT angiography (CCTA) and invasive coronary angiography. Prospectively ECG-triggered acquisition was performed with automated tube voltage selection (ATVS). Patients were dichotomized based on body mass index in groups A (<30 kg/m2, n = 37) and B (≥30 kg/m2, n = 39) and based on tube voltage in groups C (<120 kV, n = 46) and D (120 kV, n = 30). Coronary arteries were assessed for significant stenoses (≥50 % luminal narrowing) and diagnostic accuracy was calculated.Results: Per-patient overall sensitivity, specificity, positive predictive value, negative predictive value (NPV) and accuracy were 96.9 %, 95.5 %, 93.9 %, 97.7 % and 96.1 %, respectively. Sensitivity and NPV were lower in groups B and D compared to groups A and C, but no statistically significant differences were observed (group A vs. B: sensitivity, 100.0 % vs. 93.3 %, p = 0.9493; NPV, 100 % vs. 95.5 %, p = 0.9812; group C vs. D: sensitivity, 100.0 % vs. 92.3 %, p = 0.8462; NPV, 100.0 % vs. 94.1 %, p = 0.8285).Conclusion: CCTA using 3rd-generation DSCT and (ATVS) provides high diagnostic accuracy in both non-obese and obese patients.Key Points: • Coronary CTA provides high diagnostic accuracy in non-obese and obese patients. • Diagnostic accuracy between obese and non-obese patients showed no significant difference. • <120 kV studies were performed in 44 % of obese patients. • Current radiation dose-saving approaches can be applied independent of body habitus. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
Externí odkaz:	Zobrazit plný text záznamu Full text from SpringerLink