Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . The hilar and mediastinal contours are normal . The lungs are hyperinflated consistent with emphysema . There is a triangular opacity at the mid right lung which corresponds to a nodular opacity seen on the prior chest CT from ___ , however , has been persistent since that time , and is in keeping with patient 's known ___ . No other focal consolidations concerning for pneumonia are identified . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Nodular opacity in the mid right lung has been persistent since ___ , overall unchanged and is likely in keeping with patient 's known ___ . No acute intrathoracic abnormalities identified .