Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is top normal , accentuated by the AP projection . Mediastinal and hilar contours and pleural surfaces are normal . Lungs are clear without focal consolidation , pleural effusion , or pneumothorax . No free subdiaphragmatic air identified .
    OUTPUT:
    
1 . No free subdiaphragmatic air or focal consolidation . 2 . Top - normal heart size could be physiologic , post gestation .