Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left internal jugular central venous catheter ends in the upper SVC . The left chest tube is unchanged in appearance . Spinal hardware is stable . Since the prior radiograph , the previously seen mid right lung peripheral opacification has improved , suggesting that it was likely aspiration . A large right central mid and lower lung opacity persists and looks similar to multiple prior radiographs . A moderate right pleural effusion and a small left pleural effusion are unchanged . Hazy opacification at the left base is likely atelectasis , although an underlying infection can not be excluded .
    OUTPUT:
    
1 . Resolution of peripheral right mid lung zone opacification suggests it was likely due to aspiration . 2 . Persistent central right mid and lower lung opacification could represent an underlying infectious process . 3 . Stable moderate right and small left pleural effusions . 4 . Left hazy opacification is likely atelectasis , although an underlying infectious process can not be excluded .