Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild - to - moderate cardiomegaly but no pulmonary edema . Mediastinum and hila are normal . There is no pleural effusion and no pneumothorax . Patchy left basilar opacity suggests minor atelectasis . Osseous structures appear unchanged .
    OUTPUT:
    
No acute cardiothoracic process .