Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: On the frontal view , there is a subtle opacity overlying the right sixth rib . This is more prominent than on the prior exam . The lungs are otherwise clear without a focal opacity or pulmonary edema . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Subtle opacity overlying the right sixth rib . This is uncertain if it is within the pulmonary parenchyma or a deformity of the rib . Recommend a repeat PA view of the chest and shallow obliques for further characterization . Results were discussed with Dr . ___ at 3 :30 p .m . on ___ via telephone by Dr . ___ at the time the findings were discovered .