Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP chest radiograph demonstrates the right chest tube has been removed . There is no pneumothorax , but a trace pleural effusion is seen . The left PICC is in stable position . Multifocal opacification seen on ___ has improved . Since ___ , the left lung base has cleared . The heart size remains mildly enlarged , unchanged from multiple priors .
    OUTPUT:
    
No pneumothorax . Improvement of multifocal pneumonia , particularly in the left lung base compared to ___ .