Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to chest radiograph earlier today , there has been interval improvement in the right basilar opacity . The left basilar opacity is grossly unchanged and likely reflects atelectasis , though infection should be considered in the appropriate clinical setting . There is no new consolidation , pneumothorax or pleural effusion . No pulmonary vascular congestion .
    OUTPUT:
    
Interval improvement of right basilar opacity . Persistent left basilar opacity , likely atelectasis .