Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The heart is of normal size with normal cardiomediastinal contours . The chest is hyperinflated . The lungs are clear without focal or diffuse abnormality . Pulmonary vasculature is unremarkable . No pleural effusion or pneumothorax . Osseous structures are unremarkable . No radiopaque foreign body . There is calcification of the aortic knob .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Hyperinflation .