Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single upright portable radiograph of the chest was acquired . A moderate left pleural effusion is increased in size compared to prior radiographs from ___ with comparison to the most recent study from earlier today not possible given the upright technique on the current study versus the decubitus technique previously . There is no pneumothorax . The right lung is clear . The heart size is difficult to accurately assess . Mediastinal contours are normal .
    OUTPUT:
    
Moderate left pleural effusion , status post thoracentesis . No pneumothorax .