Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Marked hypoinflation of the lungs limits assessment at the bases . The hilar and cardiomediastinal contours are normal . There is no pneumothorax . There is no pleural effusion . Pulmonary vascularity is normal .
    OUTPUT:
    
Marked hypoinflation of the lungs limits assessment at the bases . No definitive acute process .