Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The ET tube is in appropriate position , and the right IJ central venous line ends at the lower SVC . The right PICC line is in appropriate position , and an orogastric tube ends outside the view of the radiograph . Lung volumes continue to be low , and previous widespread heterogeneous opacification is improving . The heart size is mildly enlarged , and the mediastinal contours are normal .
    OUTPUT:
    
Improving diffuse opacification . No new focal consolidation or effusion .