Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior film , the Swan - Ganz catheter and mediastinal drain have been removed . Again seen is sternotomy , with mild prominence the cardiomediastinal silhouette , unchanged . Also again seen is left lower lobe collapse and / or consolidation , similar to the prior film . Minimal atelectasis right base is also similar . There is upper zone redistribution , without overt CHF . Minimal blunting of left costophrenic angle is more pronounced on the current film .
    OUTPUT:
    
1 . Small left effusion is newly visible . 2 . Interval removal of Swan - Ganz catheter and mediastinal drain . 3 . Otherwise , I doubt significant interval change . 4 . Left lower lobe collapse and / or consolidation is similar to the prior film . No new area of opacity to suggest new superimposed pneumonia is detected .