Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is borderline in size , at the upper limits of normal . There is moderate unfolding of the descending aorta . The cardiac , mediastinal and hilar contours appear unchanged . There is asymmetric opacification of the right lung , compared to the left , particularly involving central regions and especially the right lower lobe . Aside from streaky left basilar opacities , the left lung appears clear . The chest is hyperinflated . Fissures are slightly thickened . A few Kerley B lines can be seen at each lung base . There is no pleural effusion or pneumothorax . Mild - to - moderate degenerative changes are similar along the mid thoracic spine .
    OUTPUT:
    
Asymmetric opacification of the right mid and lower lung relative to the left , most suggestive of pneumonia , although there may be a component of fluid overload noting Kerley B lines at both lung bases . If pneumonia is discordant with clinical findings , then perhaps an unusual asymmetric pattern of pulmonary congestion could be considered in the appropriate setting .