Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes remain low . There are persistent bilateral airspace opacities , more confluent in the left upper lobe . Appearances are consistent with pulmonary edema but superimposed infection can not be excluded . A right - sided Port - A - Cath terminates in the right atrium . No pleural effusion or pneumothorax seen . Evidence of prior cervical spine stabilization .
    OUTPUT:
    
No significant interval change when compared to the prior study .