Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs were provided . There is no focal consolidation , pleural effusion or pneumothorax . Bibasilar opacities are likely atelectasis . Valve replacement is noted . The heart is mildly enlarged . Imaged upper abdomen is unremarkable . The bones are intact .
    OUTPUT:
    
No acute cardiopulmonary process . Bibasilar atelectasis .