Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single , frontal , PA radiograph of the chest was taken with the patient in upright position . There is mild interstitial edema and pulmonary vascular engorgement . No focal airspace consolidation is seen . Moderate cardiomegaly is unchanged . There is no pneumothorax or large pleural effusion .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Mild congestive heart failure .