Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the radiographs of the chest demonstrate improvement of focal opacification of the right middle lobe compared to ___ . There is a new area of haziness in the left lower lobe with an a linear opacity superior to the left lung base . This may represent atelectasis or a new area of infection . The cardiomediastinal silhouette is normal . The pulmonary vascularity is normal . No pneumothorax or pleural effusion .
    OUTPUT:
    
1 . New focal haziness in the left lung base that may represent an area of atelectasis or a new focus of infection . 2 . Improving right middle lobe pneumonia .