Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left mid lung linear atelectasis / scarring is seen . Subtle hazy opacity projecting over the right upper lung could be due to pneumonia . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable . Right VP shunt catheter is seen projecting over the right hemi thorax , not well assessed at the inferior right hemi thorax .
    OUTPUT:
    
Patchy right upper lung opacity could be due to pneumonia . Discoid left mid lung atelectasis / scarring .