Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral chest radiograph demonstrate low lung volumes . Heart is upper limits of normal in size , likely exaggerated by low lung volumes . There is bronchovascular crowding and bibasilar atelectasis . There is no evidence of pulmonary edema , pleural effusion , or pneumothorax . No focal consolidation convincing for pneumonia is seen .
    OUTPUT:
    
No acute intrathoracic abnormality .