Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest are obtained . There has been marked elevation of the right hemidiaphragm , which has been seen on multiple prior studies dating back to at least ___ . There is persistent blunting of the right costophrenic angle . There is mild left base atelectasis . A trace left pleural effusion would be difficult to entirely exclude . Cardiac and mediastinal silhouettes are overall stable . Since the prior study , there appears to be decrease in pulmonary vascular engorgement .
    OUTPUT:
    
Stable marked elevation of the right hemidiaphragm and blunting of the right costophrenic angle . Left base atelectasis , trace left pleural effusion would be difficult to exclude . Interval decrease in central pulmonary vascular engorgement .