Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains moderately enlarged . Dense atherosclerotic calcifications are noted at the aortic knob . Mild pulmonary edema has improved compared to the previous study . There are small bilateral pleural effusions . Patchy bibasilar airspace opacities likely reflect atelectasis . No pneumothorax is demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild pulmonary edema , slightly improved compared to the prior study , with small bilateral pleural effusions and probable bibasilar atelectasis .