Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Multifocal airspace opacities bilaterally appear unchanged compared to ___ though there was interval improvement from ___ to ___ . Differential includes widespread ARDS with aspiration though pneumonia and pulmonary edema can be considered . There is no pneumothorax or pleural effusion . Cardiac size is normal . Lines and tubes in appropriate positions and unchanged from previous .
    OUTPUT:
    
No significant interval change since ___ in severe , global , infiltrative pulmonary abnormality .