Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart is mildly enlarged . No congestive heart failure . No pneumonia . Minimal patchy density projected in the right upper lung on previous chest x-ray of ___ is no longer present . AICD device noted .
    OUTPUT:
    
The lung fields are clear . No pneumonia . Patchy densities in the right lung , in the upper as well as the middle lobe seen previously have cleared .