Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left Port - A - Cath is unchanged with the tip in the upper right atrium . The lungs are clear without consolidation or edema . There is no pleural effusion or pneumothorax . There is no pneumomediastinum . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
No acute cardiopulmonary process ; specifically , no evidence of a pneumomediastinum .