Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild enlargement of the cardiac silhouette is re - demonstrated . Aorta remains mildly tortuous with calcifications seen at the aortic knob . There is no pulmonary vascular congestion . No focal consolidation is demonstrated . Patchy bibasilar airspace opacities may reflect atelectasis . No pneumothorax or pleural effusion is definitively noted .
    OUTPUT:
    
Mild bibasilar patchy opacities likely reflective of atelectasis .