Comparison of the diagnostic value of spiral CT scans at different doses for COPD / 中国现代医生

ABSTRACT

Objective To compare the diagnostic value of spiral CT scans at different doses for COPD, and to provide reference for the clinical selection of diagnostic method of COPD. Methods A total of 120 patients with a preliminary diagnosis of COPD were enrolled. The clinical symptoms, exposure history of risk factors, and family history were recorded in detail. All patients were given pulmonary function tests. The patients were randomly divided into two groups, the conventional-dose spiral CT group and the low-dose spiral CT group, and were given conventional-dose spiral CT scan and low-dose spiral CT scan, respectively. The results were read and graded by two separated radiologists, and the differences in imaging quality, radiation dose and diagnostic accuracy between the two groups were compared, and the diagnostic value of spiral CT scans at different doses for COPD was evaluated. Results There was no significant difference in the excellent rate of the images and the accuracy of the diagnosis results between the two groups (P>0.05). The radiation dose of the low-dose spiral CT was significantly lower than that of the conventional-dose spiral CT, and the difference was statistically significant (P<0.05). Conclusion The accuracy of low-dose spiral CT scan is comparable to that of conventional-dose spiral CT, and the low radiation dose has little damage to the human body, which has good reference value for the diagnosis of COPD. The excellent rates of conventional dose spiral CT and lowdose spiral CT are similar, but the image quality of the former is better.