Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest were reviewed . Median sternotomy wires and CABG clips are unchanged . The heart size is normal . The mediastinal and hilar contours are unremarkable . There is no pleural effusion or pneumothorax . Again seen is left basilar atelectasis , recurrent over multiple prior studies . There is no focal consolidation concerning for pneumonia . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
Left basilar atelectasis , which has been present intermittently over multiple prior studies , raising the question of left diaphragm paralysis . No pneumonia .