Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Somewhat suboptimal patient positioning as the patient is rotated and leaning to the left . A previous median sternotomy is noted , coronary artery bypass clips also seen . The cardiomediastinal contour is unchanged compared to the prior study . Allowing for the projection , the heart is not grossly enlarged . Ill - defined airspace opacity in the right lung base with the suggestion air bronchograms , this may reflect atelectasis , infection or aspiration . No other areas of concern for an acute process are identified .
    OUTPUT:
    
No convincing evidence of pulmonary edema , airspace opacities at the right lung base may reflect aspiration , infection or atelectasis .