The Clinical Study of Imaging Quality Appraisal and Radiation Dose with Chest Computed Tomography
Objective:To summarize and analyze the factors affecting the quality of chest CT images,and to further compare and analyze whether the image quality of the conventional dose group and the low dose group was different,so as to demonstrate the feasibility of low dose chest CT examination.Methods:A total of 150 patients with chest CT examination were selected.Group A was the conventional dose group,the tube voltage was 120kV,and the tube current was automatically adjusted;group B was the low-dose group,the tube voltage was 100kV,and the tube current was automatically adjusted.The image qual-ity of conventional dose group and low dose group was further evaluated subjectively with reference to the image quality evaluation standard of chest CT.The objective data such as radiation dose and signal-to-noise ratio were statistically processed,and P＜0.05 was regarded as statistically significant,and compared with subjective evaluation.Results:There was no statistical significance in the subjective and objective evaluation of the image quality of the two groups,and the radiation dose of group A and group B were sta-tistically significant.Conclusion:Factors affecting image quality include patient factors,equipment factors and operator factors.Chest CT using 100kV low-dose examination can be used as a routine scanning scheme,and the obtained images can meet the requirements of imaging diagnosis,which is feasible.
万方数据
维普
