Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views were obtained of the chest . New opacities in the right midlung opacity projecting in the superior segment of the right lower lobe or posterior segment of the right upper lobe are concerning for pneumonia . There is no pleural effusion or pneumothorax . The heart is stably enlarged with post CABG changes .
    OUTPUT:
    
Pneumonia involving the posterior segment of the right upper lobe or superior segment of the right lower lobe .