Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates a tracheostomy , unchanged in position . The cardiac silhouette is difficult to evaluate secondary to opacity in the bilateral lung bases , but appears increased in size . Bilateral diffuse opacities are increased . Bilateral pleural effusions are increased . There is no pneumothorax . The visualized upper abdomen is unremarkable .
    OUTPUT:
    
Increased opacities associated with increased cardiac size and pleural effusions are most consistent with increased edema , although multifocal pneumonia , hemorrhage , and ARDS remain on the differential .