Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . The lung volumes are low . There is likely bronchovascular crowding accounting for the lower lobe opacities , though the possibility of mild pulmonary edema is not excluded . No convincing signs of pneumonia . No effusion or pneumothorax . Heart size is difficult to assess . Mediastinal contour appears essentially stable from prior . Bony structures are intact .
    OUTPUT:
    
Limited exam due to low lung volumes . Lower lung opacities likely reflect bronchovascular crowding , though interstitial edema is not excluded .