Abstract：Objective To explore the application value of low-dose multi-slice spiral CT (MSCT) scan in detecting pulmonary ground-glass nodules (GGN). Methods Conventional dose MSCT scan and low-dose MSCT scan of 379 volunteers were conducted to observe the shapes, sizes, densities, internal features and boundaries of pulmonary ground-glass nodules. Results 21 ground-glass nodules were detected through conventional dose MSCT scan and 20 ground-glass nodules were detected through low-dose MSCT scan. The diameter range of the ground-glass nodules was 4~15 mm. 8 patients with pulmonary ground-glass nodules were diagnosed as primary lung cancer. Conclusion Low-dose MSCT scan which can detect pulmonary ground-glass nodules with high accuracy can be used in the screening of early lung cancer.
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