Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral ground - glass perihilar opacities that was present on ___ and had improved on ___ have completely resolved on today 's exam with minimal scarring at the left costodiaphragmatic angle . Mediastinal and cardiac contours are normal . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
Bilateral ground - glass opacities have completely resolved since ___ . There is no sign of recurrence .