Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation of the lungs is complicated due to patient rotation . Within these limitations , the lungs are well expanded but show mild atelectasis . The cardiac silhouette is mildly enlarged . The mediastinal silhouette and hilar contours are normal . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
No acute intrathoracic process .