Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable supine AP radiograph of the chest is provided . The lung volumes are low . There is no airspace consolidation . The hilar and mediastinal contours are normal . There is no pneumothorax or pleural effusion . There is mild pulmonary vascular engorgement but no frank edema .
    OUTPUT:
    
No acute cardiopulmonary process . Mild pulmonary vascular engorgement may reflect elevated central venous pressures .