The application effect of CT angiography features on qualitative and differential diagnosis of small nodules in the lung lesions

Objective To investigate the effect of CT angiography on the qualitative and differential diagnosis in small pulmonary nodules. Methods 120 patients with pulmonary small nodular lesions from September 2014 to October 2015 in our hospital were selected, and they were divided into the observation group and control group according to pathological type.the patients with malignant pathology were in the observation group, with totaling 64 cases; the patients with benign pathology were selected as a control group, with a total of 56 cases.Lesion type, sensitivity, vascular sign type, CT enhancement value and the ratio of enhancement value to aorta value in the two groups were compared and analyzed after the CT scan. Results In the observation group, positive CT angiography sign was 50 cases while negative ones was 14 cases, the sensitivity was 78.1%; In the control group, CT angiography sign was positive in 16 cases, negative in 40 cases, with the sensitivity of 28.6%.Comparing of two vascular symptoms sensitive case, there was a significant difference(χ2=6.781, P=0.012). Vascular symptoms genotyping were compared in vascular symptoms positive patients, the results showed significant differences(χ2=7.694, 6.964, 5.993, 6.012, all P<0.05). Enhanced CT scan value of patients showed positive signs in the observation group was (40.07±3.72)Hu, with the control group of (10.54±4.83)Hu, the difference was statistically significant(t=11.783, P=0.019). The ratio of enhancement CT value to aorta value in patients with positive reaction showed 24.96% in the observation group, and 4.01% in the control group, the difference was statistically significant(χ2=7.460, P=0.012). Conclusion CT angiography features has played a very important role in qualitative and differential diagnosis of small nodular lesions in the lungs.It is of great significance in the clinical diagnosis and treatment, and is worth further promotion. Key words: Tomography, X-ray computed; Angiography; Lung small nodular lesions; Differential; diagnosis