Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs demonstrate intact median sternotomy wires and CABG clips . Crowding of bronchovascular bundles in the retrocardiac region likely represents atelectasis . There is no focal consolidation , pleural effusion , or pneumothorax . The heart size is normal .
    OUTPUT:
    
No acute cardiopulmonary process .