Energy Spectrum CT Intelligent Matching Combined with Adaptive Iterative Reconstruction in Budd-Chiari Syndrome / 中国医学影像学杂志

ABSTRACT

Purpose To investigate the effect of energy spectrum CT intelligent matching combined with adaptive iterative reconstruction (ASIR) on image quality and radiation dose of Budd-Chiari syndrome. Materials and Methods 120 cases of Budd-Chiari syndrome patients underwent energy spectrum CT angiography were prospectively included. They were randomly divided into research group and control group with 60 cases in each group. The research group adopted CT intelligent matching technology and 1.6 ml/kg contrast agent, with filtered back projection (FBP) and ASIR being applied respectively for reconstruction of 40-60 keV images to obtain images of group A and B; control group used conventional 120 kVp scans and 1.8 ml/kg contrast agent, with FBP being adopted for reconstruction to obtain group C images. The main portal vein, hepatic vein, contrast noise ratio (CNR) of postcavalliver and subjective scoring of the three groups' images were compared. Results At the level of 40-60 keV, the CNR of each part of group B was the highest, and the difference among the three groups was statistically significant (P<0.01). At the level of 40 keV, the subjective scoring of group C was the highest, being (3.61±0.53) points; at the level of 50-60 keV, the subjective scoring of group B was the highest, being (3.67±0.61) points and (3.91±0.66) points, respectively, the differences of which were all statistically significant (P<0.05). Conclusion The radiation dose obtained through energy spectrum CT intelligent matching is equivalent to that through conventional scans. The use of ASIR technology can reduce the amount of contrast agent while improving image quality.