Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The lung volumes are low . Allowing for low lung volumes , the mediastinal and hilar contours appear within normal limits . There are patchy bibasilar opacities , which suggest crowding of vascular markings associated with low lung volumes without definite focal opacity suggestive of pneumonia . Mild pleural thickening is present at each lung apex . The bony structures are unremarkable .
    OUTPUT:
    
No evidence of acute disease .