Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior film , the overall appearance is similar . Again seen is the tracheostomy . Heart size is probably unchanged . Patchy density the left base consistent with collapse and / or consolidation is again noted , overall similar . The possibility of a small left effusion would be difficult to exclude . The right lung and costophrenic sulcus are grossly clear . No overt CHF . Balloon related to G tube noted . Old healed right clavicular fracture again noted .
    OUTPUT:
    
Left lower lobe collapse and / or consolidation , similar to the prior study .