Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacity at the right lung base likely represents residual scar from site of prior right middle lobe pneumonia . The catheter from a right chest wall port terminates within the right atrium . There is no focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .