Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild left base atelectasis seen on the frontal view without clear correlate on the lateral view . No definite focal consolidation is seen . There is no pleural effusion or pneumothorax . The aorta is slightly tortuous . The cardiac silhouette is not enlarged . There is no overt pulmonary edema .
    OUTPUT:
    
Mild left base atelectasis . Otherwise , no acute cardiopulmonary process .