Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates a right subclavian line terminating at the level of the mid to lower SVC in constant position . Previously identified small right apical pneumothorax persist but is decreased in size . The lungs are grossly clear with no new focal consolidation . There is persistent unchanged large left pleural effusion with associated basilar atelectasis . There is additional right opacification unchanged from prior examination 1 day ago , likely atelectasis although differential includes aspiration pneumonia . Incidental note is made of IVC filter and contrast material within loops of bowel .
    OUTPUT:
    
Persistent but decreased small right apical pneumothorax . Unchanged bibasilar opacifications likely atelectasis but can not exclude pneumonia .