Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is not enlarged . Mediastinal contours are unremarkable . There is mild left base atelectasis without definite focal consolidation . No large pleural effusion is seen . There is no evidence of pneumothorax . No overt pulmonary edema is seen .
    OUTPUT:
    
Mild left base atelectasis . Otherwise , no acute cardiopulmonary process .