Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A beside AP radiograph of the chest shows apparent interval enlargement of the pulmonary vasculature and mediastinum which may represent hypervolemia or be artifactual due to AP technique . The lungs are clear and the hilar contours are normal . There is no pneumothorax , pulmonary edema , or pleural effusion .
    OUTPUT:
    
Possible pulmonary vascular engorgement without pulmonary edema . Alternatively , this may be artifactual due to AP technique .