Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , there has been slight improvement , with increased aeration of upper lobes . Bibasilar atelectasis with small pleural effusions are stable . Mediastinal and cardiac contour enlargement is unchanged . Tracheostomy and left - sided defibrillator in the right ventricle are in adequate position .
    OUTPUT:
    
Slight improvement with unchanged bilateral pleural effusions and bibasilar atelectasis .