Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . There is no consolidation , pulmonary edema , pleural effusion , or pneumothorax . The mediastinal contours are normal . The heart size is at the upper limits of normal . The patient is status post sternotomy with unchanged post-surgical changes in the mediastinum . A vertical thin catheter overlies the right hemithorax , lower neck , and upper abdomen . This is of uncertain etiology and may be outside the patient . Recommend clinical correlation .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically , no evidence of pulmonary edema .