Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is new linear atelectasis seen within the right middle lobe . A left lower lobe opacity , measured 1 .6 x 0 .9 cm is unchanged from the prior CT . There is no pleural effusion or pneumothorax . The cardiomediastinal contours are normal .
    OUTPUT:
    
1 . New linear atelectasis at the right lung base . 2 . Unchanged rounded opacity in the left lower lung .