Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The hilar and mediastinal contours are normal . Bibasilar linear opacities are most compatible with atelectasis , worse at the cardiophrenic angle . Trace right pleural effusion . There is no pneumothorax . The visualized osseous structures are unremarkable .
    OUTPUT:
    
Subtle opacity right lung base is likely atelectasis , however a small consolidation can not be excluded .