Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . No new focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . Peripheral opacity in the left lung base appears improved from the prior study , and may represent residual atelectasis with scarring . Heart and mediastinal contours are stable with unchanged calcified aorticopulmonary window lymph node compatible with prior granulomatous disease . Right - sided Port - A - Cath is similarly positioned . Sternal wires appear intact on these views . The patient is status post CABG .
    OUTPUT:
    
No radiographic evidence for acute cardiopulmonary process .