Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the immediate prior study of ___ , pulmonary edema and pulmonary vascular congestion have improved , both now mild . The right hilum is persistently enlarged , but looks arterial perhaps due to left heart failure . The previous left - sided nodule is not appreciated on the present study . Conventional PA and lateral radiographs will be helpful for further assessment when clinically feasible . There may be a small left pleural effusion . There is no focal consolidation or pneumothorax . The heart is stably top - normal in size .
    OUTPUT:
    
1 . Interval improvement in pulmonary edema and pulmonary vascular congestion , now mild . 2 . Persistent enlargement of the right hilum , could be arterial enlargement due to left heart failure .