Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there has been interval increase of bilateral diffuse opacities , worse in the upper lobes . There is evidence of a dilated azygos vein . Cardiomediastinal silhouette is unchanged . There is no pneumothorax .
    OUTPUT:
    
Increased bilateral diffuse opacities , worse in the upper lobes which likely represent asymmetric edema related to position ; alternatively , these findings could be related to concurrent pneumonia . Depending upon clinical circumstances , these findings could also represent pulmonary hemorrhage .