Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette remains mildly enlarged . Mediastinal contours are unremarkable . There is mild left base atelectasis . No definite focal lucency in . There is no pleural effusion or pneumothorax . No pulmonary edema is seen .
    OUTPUT:
    
Mild left base atelectasis . Mild cardiomegaly . No pulmonary edema .