Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single semierect frontal view of the chest demonstrates top normal heart size , likely accentuated by AP technique . Apparent mild widening of the mediastinum may be related to semi-supine positioning . Minimal vascular congestion is present . The lungs are relatively well aerated allowing for underpenetration . No pneumothorax or large effusion .
    OUTPUT:
    
Limited exam . Mild pulmonary vascular congestion .