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 . There is no focal consolidation or pneumothorax . A pleural effusion is small . Mild left basilar atelectasis is improved . Cardiac silhouette is stable . The mediastinal silhouette is slightly narrower after CABG than it was immediately post operatively .
    OUTPUT:
    
No pneumonia or edema .