Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The support apparatus is unchanged and in good position . Scattered areas of basal atelectasis have slightly improved and right lower lobe . Left lower lobe collapse has improved post streaky and subsegmental atelectasis . Interval enlargement of bilateral hila could represent mild pulmonary vascular congestion . There is a small left pleural effusion , slightly increased . No pneumothorax . The heart is not significantly enlarged .
    OUTPUT:
    
Interval enlargement of bilateral hila could represent mild pulmonary vascular congestion . Interval improvement of bibasal atelectasis , left greater than right .