Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable frontal chest radiograph with the patient in semi upright position . There has been interval improvement in bibasilar atelectasis with mild increase in lung volumes . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . Heart size is normal . There is stable widening of the right upper mediastinum , unchanged since studies dating back to ___ , and likely represents an enlarged thyroid .
    OUTPUT:
    
1 . No evidence of focal consolidation to suggest pneumonia . 2 . Stable right upper mediastinal widening , likely an enlarged thyroid .