Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , although lung volumes are low . Cardiac silhouette is unremarkable . The right mediastinal contour appears to be slightly prominent ; however , comparing this to the scout film from ___ CT of the abdomen and pelvis , it appears unchanged . No pleural effusion or pneumothorax . No gross bony abnormalities .
    OUTPUT:
    
No acute cardiopulmonary process .