Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right subclavian Port - A - Cath tip terminates at the cavoatrial junction . Mild cardiomegaly is unchanged . Cardiomediastinal silhouette and hilar contours are unremarkable . Mild retrocardiac atelectasis . Lung volumes are low but otherwise clear . No pneumothorax or effusion .
    OUTPUT:
    
No acute cardiopulmonary abnormality .