Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Interval mild improvement in moderate pulmonary edema , particularly in the right lung , with unchanged appearance of the left lung . There is no pneumothorax . Severe cardiomegaly is unchanged . All support devices are in standard placement . Median sternotomy wires are aligned .
    OUTPUT:
    
Mild interval improvement of moderate pulmonary edema , particularly in the right lung , since prior exam in ___ . No pneumothorax .