Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . There are patchy increased opacities at both lung bases which could be seen with pneumonia although aspiration or atelectasis could be considered . A tracheostomy is in place . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
New bibasilar opacities , with low lung volumes . Considerations include pneumonia in the appropriate clinical setting , but atelectasis or even aspiration could be considered depending on clinical circumstances .