Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lordotic positioning . Heart size at the upper limits of normal . Aorta slightly unfolded . No CHF , focal infiltrate , effusion , or pneumothorax detected . Possible minimal atelectasis in the right cardiophrenic region . Mild AC joint degenerative changes noted , right greater than left .
    OUTPUT:
    
No acute pulmonary process detected . No focal opacity to suggest aspiration pneumonitis identified . Possible minimal atelectasis in the right cardiophrenic region .