Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . The lungs are clear . There is a nodular opacity projecting over the right lung base lungs are otherwise clear and there is no effusion or pulmonary vascular congestion . The cardiomediastinal silhouette is within normal limits . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No acute cardiopulmonary process . Rounded dense nodular structure projecting over the right lung base , potentially within the lung or alternatively a bone island within the ___ right rib . Shallow obliques suggested further characterize .