Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral ground - glass opacities have significantly improved , but are not completely resolved . Considering the characteristics of these opacities and a CT scan , it was highly suggestive of Pneumocystis infection There is no pleural effusion or pneumothorax . Mediastinal and cardiac contours are normal .
    OUTPUT:
    
Bilateral ground - glass opacities has significantly improved but has not completely resolved .