Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is normal . Mediastinal and hilar contours are unremarkable . Crowding of the bronchovascular structures is present without pulmonary edema . Minimal bibasilar patchy opacities are similar compared to the prior study , likely reflective of atelectasis in the setting of low lung volumes . No focal consolidation , pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis . No focal consolidation .