Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes have decreased with crowding of the bronchovascular structures and new paucity . No pulmonary edema . Mild cardiomegaly with ectasia of the aorta unchanged . Right thyroid goiter with widening of the superior mediastinal border unchanged . Prior median sternotomy and CABG .
    OUTPUT:
    
No pulmonary edema , interval decrease in lung volumes with new retrocardiac opacity likely atelectasis , although in the absence of the lateral radiograph consolidation / pneumonia can not be excluded .