Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Low lung volumes result in bronchovascular crowding . Linear atelectasis at the left lung base is seen . There is no focal consolidation , pleural effusion or pneumothorax . Heart size is upper limits of normal size . The mediastinal silhouette and hilar contours are normal .
    OUTPUT:
    
No pneumonia , edema or effusion .