Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest when compared to the prior study show mild increase in the left basilar opacity with continued mild left basilar atelectasis . Appearance of the right lung is unchanged with no acute consolidation . No pneumothorax is appreciated . The hilar contours are unchanged with continued fullness of the left hilum .
    OUTPUT:
    
Mild improvement in left basilar opacity with continued atelectasis at the left base .