Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The endotracheal tube , NG tube , and left subclavian central venous catheters are unchanged in position . There is no pneumothorax . Lung volumes are low . Moderate bilateral airspace opacities appears slightly improved , particularly in the right mid to upper upper lung fields . Small layering pleural effusions are stable , left greater than right . The heart and mediastinum are magnified by the projection .
    OUTPUT:
    
Slightly improved bilateral airspace opacities which may be due to resolving pulmonary edema or multifocal pneumonia . Stable small layering pleural effusions , left greater than right . Lines and tubes remain in satisfactory position .