Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , sternotomy wires and mediastinal clips are now present . Mild cardiomegaly is again seen . There is borderline upper zone redistribution , without overt CHF . There is possible minimal subsegmental atelectasis of the left lung base . No focal consolidation or pleural effusion is identified . The right hemidiaphragm is again noted to be eventrated . Incidental note again made of mild degenerative spurring in the thoracic spine .
    OUTPUT:
    
Mild cardiomegaly , with interval cardiac surgery since ___ . Possible minimal subsegmental atelectasis at the left base . No focal infiltrate to suggest pneumonia .