Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a focal opacity in the right hilum and a nodule measuring up to 1 .5 cm in the right lung , though difficult to localize . Heart size is within normal limits . Mediastinal and hilar contours are unremarkable . There is no evidence for pulmonary edema , pleural effusion , or pneumothorax . post obstructive atelectasis . 2 weeks CT with contrast .
    OUTPUT:
    
An apparent right hilar mass could be due to be due to unusual collapse of the right middle lobe , but is nevertheless concerning for obstructive adenopathy . 15 mm nodule in the right midlung is concerning for active malignancy or infection . Left hilus is not enlarged . Mediastinal contours are normal but central adenopathy is not excluded , particularly the subcarinal station . Left lung is clear . There is no pleural effusion . Heart is normal size .