Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A subtle nodular opacity is present in the right upper lobe at the level of the second right anterior rib , difficult to assess due to overlap with the adjacent scapular border at apparently new compared to the prior radiograph . No additional nodules are observed in the remainder of the lungs . Heart is enlarged but stable in size . There is no pleural effusion . Scoliosis is again demonstrated .
    OUTPUT:
    
Right upper lobe nodular opacity , not fully evaluated by chest radiography . Recommend chest CT for confirmation and further characterization .