Application of low tube voltage with low concentration contrast agent volume of coronary CTA examination in the diagnosis of coronary artery stenosis
10.3969/J.ISSN.1672-8270.2016.03.016
- VernacularTitle:低管电压和低浓度对比剂容积CT血管造影检查在冠状动脉狭窄诊断中的应用
- Author:
Xiaoming LI
;
Jiang PU
;
Hongyu DONG
- Publication Type:Journal Article
- Keywords:
Low tube voltage;
Low concentration contrast medium;
Volume CT coronary angiography;
Coronary artery stenosis
- From:
China Medical Equipment
2016;13(3):57-60
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effect and application feasibility of low tube voltage, low concentration of contrast agent volume to CTA in the diagnosis of coronary artery stenosis and its effect.Methods: Seventy two cases of suspected patients with coronary atherosclerosis selected as the object Using random number table method, all patients were divided into group A and group B 36 cases in each group, two groups of patients underwent 320 slice CTA examination, in group A the tube voltage is 120kV, the contrast agent was 350mgI/mL iodixanol group, B tube voltage is set to 100kV, the contrast agent was 270mgI/mL iodixanol. According to the examination results of group A, group B and catheter coronary angiography (CCA), evaluated group A, group B of acquiring the image quality and radiation dose of patients, and analyzed the sensitivity of A, B and CCA examination of the extent of coronary artery stenosis degree and deliberately.Results: The quartering method showed no significant difference between the group A and the group B of image quality. There was significant difference between the two groups of patients with the image noise and enhance the effect (t=-4.736, 11.927;P<0.05); Group B of coronary artery stenoses (more than 50%) and severe stenosis (more than 75%) sensitivity, specially degree and coincidence rate compared with the results of CCA showed no significant difference. Kappa consistency analysis showed that the two consistency is good(kappa=1.320,P<0.001).Conclusion: In the premise of ensuring the image quality with low tube voltage, low concentration of contrast agent volume coronary CTA examination had safety and reliability of inspection.
