Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse airspace opacities bilaterally . There may be trace pleural effusions . No pneumothorax is seen . The cardiac silhouette is top - normal to mildly enlarged . Mediastinal contours are unremarkable . Spinal catheter is noted .
    OUTPUT:
    
Diffuse airspace opacities bilaterally . Differential diagnosis includes pulmonary edema / ARDS , diffuse infection , pulmonary hemorrhage .