Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to the chest radiograph obtained 1 day prior , bilateral lung volumes are substantially lower with substantial right middle and lower lobe atelectasis and rightward mediastinal shift . Opacities at the left lung base appear unchanged and may be consistent with atelectasis or pneumonia . There probably small , right greater than left pleural effusions . Heart size is mildly enlarged with new , mild pulmonary edema . Support devices and lines are unchanged and appropriately positioned .
    OUTPUT:
    
Substantial , new , right middle and lower lobe atelectasis with rightward mediastinal shift . Mildly enlarged heart with new , mild pulmonary edema and small bilateral pleural effusions .