Study on Diagnosis of Small Lung Cancer by Dynamic Enhanced CT / 实用放射学杂志

ABSTRACT

Objective To investigate the dynamic enhanced CT scanning in differentiation of small lung cancer.Methods 20 patients with pathologically confirmed small lung cancer,and 6 patients with inflammatory nodules,5 patients with tuberculoma were studied with plain chest CT scan and dynamic enhanced (the delay time of scans was 30 s,1,3,5,7 min after injection)before surgery.Then the enhancement degree of the lesions was recorded in different time lag.The time-attenuation curves of different diseases were drawn.Results Tuberculoma showed a significantly lower degree of enhancement than the pulmonary carcinoma and inflammatory nodules,it showed a lower and flat line.The carcinoma and the inflammation showed no differences in degree of enhancement.But the peaks of the tow curves appeared to be different in various time of delay,tumor reached its peak in 1～3 minute after injection of contrast medium which dropped behind the inflammatory.Conclusion The results suggested that from the time-attenuation curve we could make the different diagnosis between small lung lesions.