Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Patchy left mid lung opacity is seen , raising concern for pneumonia . There may be scarring / fibrotic changes at the lateral right upper lobe . Underlying pulmonary emphysema is seen . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Patchy left mid lung opacity may represent pneumonia . However , in this patient with background of pulmonary emphysema , recommend followup to resolution to exclude an underlying lesion . Possible focal fibrotic changes at the lateral right upper lung .