Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate low lung volumes . Patchy bibasilar opacities persist and are not significantly changed from prior study . Trace bilateral pleural effusions are noted . There is no pneumothorax . No pulmonary edema is seen . Hilar and mediastinal silhouettes are unremarkable . Heart size is normal . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
In comparison to ___ exam , there is no significant change in bibasilar patchy opacities , which likely represent atelectasis , aspiration , or infection in the appropriate clinical setting , although the lack of any change perhaps makes chronic findings more likely .