Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . Mediastinal silhouette and hilar contours are unremarkable . There is mild left base atelectasis . Lungs are otherwise clear . Lateral left pleural thickening is unchanged from prior study . Pleural surfaces are otherwise clear without effusion or pneumothorax . No overt traumatic findings .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No overt traumatic findings .