Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right base opacity persists along with blunting of the right costophrenic angle , similar to prior . Interstitial edema has improved in the interval . Left base atelectasis . Minimal to no left pleural effusion . No pneumothorax . Cardiac silhouette is grossly stable to minimally enlarged . Mediastinal contours are stable .
    OUTPUT:
    
Interval decrease in pulmonary vascular congestion since the prior study , otherwise no significant interval change ; re- demonstrated right base opacity and blunting of the right costophrenic angle . Possible effusion and atelectasis , superimposed infectious process not excluded although the appearance similar to ___ year prior .