The Feasibility of Low Dose CT Scan in the Diagnosis of Pulmonary Tuberculosis / 实用放射学杂志

ABSTRACT

Objective To explore the feasibility and value of low dose CT scan for the diagnosis of pulmonary tuberculosis.Methods 150 patients with pulmonary tuberculosis underwent three doses CT scan (standard dose150 mA;low-dose15 mA and 30 mA) using GE dual slices helical CT.Besides the different tube current,other scan parameters including tube voltage,scan cycle,pitch,and collimation were the same in three dose groups.The scanned extent was from apexes to bases of lung.Image quality in standard group was compared with that in other two low dose groups and analyzed statistically by three radiologists.Results CT characteristics of pulmonary tuberculosis could be detected efficiently using low dose CT scan(30 mA) program,which was no significant as compared with the CT image using standard CT sose(P＞0.05).Howere,CT scan at 15 mA obviously affected on the diagnosis for both active and inactive pulmonary tuberculosis,the difference was significant (P＜0.05).Conclusion Low dose CT scan can replace totally the standard dose CT scan in diagnosing pulmonary tubercrulosis.