Objective: To explore the diagnostic value of combined use of revolution CT with different weights of ASIR-V iterative reconstruction in coronary artery imaging at low tube voltage (100 kVp).
Methods: Fifty patients who were underwent coronary CT angiography by Revolution CT from January 20 to January 2017 were enrolled in this study. With administration of regular FBP and 20%, 40%, 60%, 80%, and 100% of Adaptive Statistical Iterative Reconstruction (ASIR) technique, the subjective and objective indicators of the images in each group were evaluated.
Results: The radiation doses of the subjects were (1.72 ± 0 MSv). The subjective and objective scores of reconstructed images in each group at different ASIR-V weights (20%, 40%, 60%, 80% and 100%) were better than those in FBP group (P<0.05). The difference of objective scores of ASIR-V reconstructed images at different weights (20%, 40%, 60%, 80% and 100%) was statistically significant (P<0.05).
Conclusion: The low dose revolution CT combined with iterative reconstruction technique in coronary angiography at low tube voltage (100 kVp) can help reduce the dose of radiation and ensure the diagnostic value of the images. In the course of use, 60% or 80% ASIR-V reconstruction is recommended for best image quality.Author(s): Xiujie Duan, Daliang Liu, Yucun Fu, Qing Wang