Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval progression of airspace opacity in the left lung from ___ . There is no large pleural effusion , or pneumothorax . The cardiac silhouette remains normal in size , and mediastinal contours demonstrate calcification of the aortic knob , and tortuosity of the thoracic aorta . Median sternotomy wires remain in place . A right chest ___-___ tip terminates in the lower SVC .
    OUTPUT:
    
Interval progression of airspace opacity within the left lung from ___ concerning for progression of BAC . Known right lung disease is not well seen .