Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath tip terminates within the proximal right atrium , unchanged . Lung volumes are low . Mild enlargement of cardiac silhouette is unchanged . The aorta remains mildly tortuous . There is crowding of the bronchovascular structures , but no overt pulmonary edema is visualized . Known nodules within both lower lobes are better depicted on the prior CT . There is minimal streaky atelectasis in both lung bases . No focal consolidation , pleural effusion or pneumothorax is present . Cholecystectomy clips are demonstrated in the right upper quadrant of the abdomen . There are no acute osseous abnormalities .
    OUTPUT:
    
Mild bibasilar atelectasis . Known bilateral lower lobe pulmonary nodules are better depicted on the prior CT .