Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rotated positioning . There are low inspiratory volumes . Allowing for this , the heart is probably slightly enlarged . Sternotomy wires are present . Two leads from a far - left pacemaker pack are noted , with lead tips over right atrium and right ventricle . Detailed assessment of the cardiac contour is limited by rotation and low lung volumes . There is upper zone redistribution , without definite CHF . There is some hazy increased retrocardiac density , probably unchanged , which could reflect some left lower lobe collapse and / or consolidation . Elsewhere , no focal opacity to suggest superimposed pneumonia / infiltrate is identified . No gross effusion .
    OUTPUT:
    
Hazy retrocardiac density is similar to prior and could represent some collapse and / or consolidation in the left lower lung . No new superimposed opacity is identified .