Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is stable . Patient has known emphysema . Nodules and irregular opacities in the left upper lobe and right lower lobe are better seen in prior CT . Increase opacities in the right lower lobe could be atelectasis but superimposed infection can not be excluded in the appropriate clinical setting . There is no pneumothorax or effusion .
    OUTPUT:
    
Emphysema Left upper and right lower lobe nodules better seen in prior PET - CT New right lower lobe opacity could be atelectasis or pneumonia in the appropriate clinical setting