Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Flattened hemidiaphragms and a deep retrosternal space suggest moderate overinflation . The lung parenchyma shows otherwise normal structure and transparency . There is no evidence for pneumonia or other pathologic parenchymal processes . Normal size of the cardiac silhouette . Minimal tortuosity of the thoracic aorta .
    OUTPUT:
    
Moderate overinflation , but no pneumonia .