Diagnostic value analysis of low-dose 64-slice spiral CT scan in pulmonary nodules
Objective To analyze the clinical value of low-dose 64-slice spiral CT scan in pulmonary nodules.Methods 88 patients with pulmonary nodules were selected as the study subjects,all of whom underwent low-dose 64-slice spiral CT scan and conventional-dose 64-slice spiral CT scan.Using the pathological results of puncture biopsy as the gold standard,the results of CT scan,diagnostic efficiency,effective radiation dose and image quality score of the two methods were compared.Results The results of puncture biopsy showed that there were 29 malignant nodules and 59 benign nodules in 88 pulmonary nodules.Low-dose 64-slice spiral CT scan detected 22 cases of malignant nodules,accounting for 75.86%(22/29),and 47 cases of benign nodules,accounting for 79.66%(47/59);conventional-dose 64-slice spiral CT scan detected 23 cases of malignant nodules,accounting for 79.31%(23/29),and 49 cases of benign nodules,accounting for 83.05%(49/59).There was no statistically significant difference in accuracy,sensitivity,specificity,positive predictive value,and negative predictive value between low-dose and conventional-dose 64-slice spiral CT scans(P>0.05).The effective radiation dose of low-dose 64 slice spiral CT scan was(7.55±1.21)mSv,which was lower than(13.82±2.22)mSv of conventional-dose 64-slice spiral CT scan,and the difference was statistically significant(P<0.05).The difference in image quality scores between the two methods was not statistically significant(P>0.05).Conclusion Compared with conventional-dose 64-slice spiral CT scan,low-dose 64-slice spiral CT scan has higher diagnostic accuracy,ideal diagnostic efficacy and comparable image quality for pulmonary nodules.However,low-dose 64-slice spiral CT scan has less radiation and more security,so it is recommended to be popularized.
万方数据
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