Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiomegaly is unchanged . There is improved central pulmonary vascular congestion ; pulmonary edema has resolved . Trace bilateral pleural effusions are nearly resolved . There is no pneumothorax . A left retrocardiac opacity has improved , reflecting improved atelectasis . A left - sided generator pack projects a single lead into the right ventricle .
    OUTPUT:
    
Resolved pulmonary edema . Nearly resolved bilateral pleural effusions . Improved left lower lobe atelectasis .