Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Mild opacity in the right upper lobe is unchanged from ___ CT allowing for differences in technique . There is no new opacity and no focal consolidation , pleural effusion , or pneumothorax . Heart size is normal . Mediastinal silhouette is normal . Left hilar prominence is due to known left hilar lymphadenopathy .
    OUTPUT:
    
No pneumonia , edema , or effusion .