Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No focal opacity to suggest pneumonia is seen . No pleural effusion , overt pulmonary edema or pneumothorax is present . The heart size is at the upper limits of normal , unchanged . A right - sided vascular stent is seen within the brachiocephalic vein .
    OUTPUT:
    
No evidence of acute intrathoracic process .