Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate intact median sternotomy wires . Compared to the prior radiograph there has been interval increase in lung volumes with continued bibasilar atelectasis and small bilateral pleural effusions . There has been interval resolution of the left apical pneumothorax . No focal consolidation is identified . Stable cardiomegaly is again noted . Prosthetic aortic valve is seen on the lateral view . Expected post operative mediastinal air is noted .
    OUTPUT:
    
1 . Interval improvement in lung volumes with small bilateral pleural effusions . 2 . Interval resolution of left apical pneumothorax .