Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single upright frontal view of the chest shows no free air below the hemidiaphragms . Slight hazy opacification at the left base is likely atelectasis . There is no pulmonary edema , pleural effusion or pneumothorax . The patient is status post a CABG . The sternal wires are intact . Multiple clips are seen within the mediastinum . The cardiomediastinal silhouette is otherwise normal .
    OUTPUT:
    
1 . No evidence of free air beneath the diaphragms . 2 . No acute cardiopulmonary process .