Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unchanged . Patchy left basilar opacification has mostly resolved . There is blunting along the visualized part of the left costophrenic sulcus suggestive of a small effusion .
    OUTPUT:
    
Decreased basilar opacification with a suggestion of a small left - sided pleural effusion .