Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP chest radiograph is obtained with patient in the upright position . Cardiomediastinal contours are unchanged compared to the prior study . Pulmonary edema appears to be slightly improved . Left PICC is unchanged . No large pleural effusions and no pneumothorax .
    OUTPUT:
    
Slight improvement in pulmonary edema . Otherwise unchanged .