Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes , leading to the appearance of increased heart size and interstitial lung markings . There is increased opacification at both bases with blunting of both costophrenic sulci , indicating pleural effusion and atelectasis . There is no pneumothorax . There is evidence of prior spinal surgery .
    OUTPUT:
    
Bilateral basilar opacification with pleural effusions . In the appropriate clinical setting , this could be consistent with pneumonia .