Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Flattening of the hemidiaphragms and increased AP diameter of the chest suggests chronic obstructive pulmonary disease . Opacity in the right middle lobe could be pneumonia , should be evaluated with Chest CT to differentiate from mass . There is no pleural effusion . Calcifications are noted within the aortic arch . The heart size is top normal .
    OUTPUT:
    
Chronic obstructive pulmonary disease . Right middle lobe pneumonia or mass . Suggest Chest CT .