Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previous severe pulmonary opacification has moderately improved since ___ . Mild cardiomegaly persists , and the ET tube , right PICC , right central venous line , and gastric tube are in stable and appropriate position . Lung volumes continue to be low without focal consolidation .
    OUTPUT:
    
Moderate improvement in severe pulmonary opacification . ET tube in appropriate position .