Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lateral view is suboptimal due to the patient 's overlying arm . Given this , there is subtle patchy left base retrocardiac opacity , best seen on the frontal view , which could be due to atelectasis ; however , underlying consolidation due to aspiration and / or pneumonia is not excluded . There is minimal elevation of the right hemidiaphragm . The patient is status post median sternotomy . The aorta is calcified and tortuous . The cardiac silhouette is top normal to mildly enlarge . No overt pulmonary edema is seen . No large pleural effusion or pneumothorax . Degenerative changes are seen at the right shoulder , the right humeral head is high - riding , which can be seen in rotator cuff disease .
    OUTPUT:
    
Lateral view is suboptimal due to the patient 's overlying arm . Subtle patchy left base opacity could be due to atelectasis , although underlying consolidation due to aspiration or pneumonia may be present .