Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal AP upright and lateral views of the chest were obtained . There is no focal consolidation , pleural effusion or pneumothorax . Opacity at the left base has improved since the prior study . Heart size is top normal , allowing for technique . The mediastinal silhouette and hilar contours are stable with mild aortic tortuosity . No upper abdominal or osseous abnormality is identified .
    OUTPUT:
    
No pneumonia , edema or effusion .