Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . There is stable postoperative mediastinal contour status post CABG . A linear band of fibrosis in the lingula is unchanged . Lungs are otherwise clear . There is no evidence of vascular congestion or pulmonary edema . There is no pleural effusion or pneumothorax . A right PICC is unchanged in position with the tip projecting over the lower SVC .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically , no evidence of pneumonia .