Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are relatively low lung volumes . Subtle inferior basilar opacity projecting over the spine on the lateral view is felt due to likely be artifactual or due to atelectasis although there is not a clear correlate on the frontal view . No pleural effusion or pneumothorax is seen . Cardiac silhouette is top normal , likely accentuated by low lung volumes . Mediastinal and hilar contours are unremarkable . No displaced fracture is identified .
    OUTPUT:
    
Low lung volumes without definite acute cardiopulmonary process . Top normal heart size is likely accentuated by low lung volumes .