Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable chest radiograph demonstrates low lung volumes . Heart size is exaggerated by low lung volumes and technique . There is no focal opacity present . No evidence of pulmonary edema . Streaky opacities at the lung bases reflect atelectasis . There is no large pleural effusion or pneumothorax . No air under the right hemidiaphragm is present .
    OUTPUT:
    
No air under the right hemidiaphragm . No acute intrathoracic abnormality .