Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . The lung volumes are low . The cardiomediastinal contour remains unchanged . An endotracheal tube and orogastric tube are unchanged position . A right - sided IJ central venous catheter terminates within the right atrium . There is no pneumothorax . Widespread bilateral pulmonary opacities appear slightly improved since the ___ examination .
    OUTPUT:
    
Slight improvement of widespread bilateral pulmonary opacities since ___ .