Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright frontal image of the chest . Mild pulmonary vascular engorgement is again seen , similar to prior exam . The costophrenic angles are not visualized , which may due to technique and overlying soft tissues vs pleural effusions . No focal opacity or mass is seen . There is no pneumothorax . The cardiomediastinal silhouette is moderately enlarged , similar prior exam . Left - sided pacer with intact leads in appropriate position is again noted .
    OUTPUT:
    
Mild pulmonary edema , unchanged from prior exam .