Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right lower lobe pneumonia has substantially improved . However , there is a new right upper lobe airspace opacity which may be due to infection in the appropriate clinical setting . Symmetric biapical pleural scarring is unchanged . There is no pneumothorax or pleural effusion . The heart and mediastinum are within normal limits . Mild spinal degenerative changes are present .
    OUTPUT:
    
New right upper lobe airspace opacity which is worrisome for pneumonia or focal aspiration .