Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A persistent region of atelectasis in the right mid lung is slightly more prominent today . Chronic enlargement of the heart and mild congestion of the central pulmonary vasculature are unchanged . There is no pneumothorax or appreciable pleural effusion . The left lung is grossly clear .
    OUTPUT:
    
Right mid lung atelectasis , alternatively pneumonia , increased mildly . Chronic cardiomegaly and venous hypertension unchanged since the prior study . Left lung is grossly clear . A preliminary report was issued by Dr . ___ to Dr . ___ on ___ . Subsequently , Dr . ___ was paged at 10 :37 on ___ by Dr . ___ ___ the findings were subsequently discussed over the phone .