Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation is limited secondary to patient body habitus . Lung volumes are low leading to crowding of the bronchovascular structures . As compared to the most recent prior examination dated ___ , there has been no significant interval change . There is no lobar consolidation , pleural effusion , or pneumothorax identified . A subtle , 1 .5 cm nodular opacity is again noted overlying the right upper lung . The heart is top - normal in size .
    OUTPUT:
    
1 . Low lung volumes without evidence for acute cardiopulmonary process . 2 . 1 .5 cm right upper lobe nodular opacity has been present radiographically since at least ___ . Chest CT would be helpful for more complete characterization .