Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . A left PICC terminates at the confluence of the brachiocephalic and upper SVC . Small bilateral pleural effusions have improved since the ___ radiograph . The heart size is normal . The hilar and mediastinal contours remain within normal limits . There is no pneumothorax .
    OUTPUT:
    
Slight decrease in size of small bilateral pleural effusions . No pneumothorax .