Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright chest film ___ at 15 10 is submitted .
    OUTPUT:
    
Interval decrease in size of a right pleural effusion with residual small to moderate effusion and improved aeration of the right lung . Persistent opacities at the right base which may reflect residual atelectasis , although pneumonia can not be excluded . The left lung is grossly clear . No large pneumothorax is seen , although there is possibly a tiny right apical pneumothorax . This can be better assessed on followup imaging . No pulmonary edema . Cervical spinal fusion hardware and a right shoulder arthroplasty are incompletely visualized