Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are stable and within normal limits . The lungs continue to demonstrate diffuse airspace and intersitial opacities , which show a worsening trend from ___ to ___ , but then show improvement from ___ to present . Blunting of the costophrenic angles as well as subtle obscuring of the hemidiaphragms suggests some degree of bibasilar atelectasis and small bilateral pleural effusions . There is no pneumothorax .
    OUTPUT:
    
Diffuse airspace and interstitial opacities which worsened from ___ to ___ , but improved from ___ to present ; the differential diagnosis includes pulmonary hemorrhage , pulmonary edema , and interstitial fibrosis ; correlate with the treatment that brought on the improvement in appearance .