Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac silhouette is mild - to - moderately enlarged with mild tortuosity of the thoracic aorta , unchanged from at least ___ . There is prominence of the central pulmonary vasculature with mild interstitial pulmonary edema . Lungs are otherwise clear . Pleural surfaces are clear without effusion or pneumothorax . No definite fracture is identified .
    OUTPUT:
    
1 . Moderate cardiomegaly with mild pulmonary edema . 2 . No definite fracture . Please note that conventional radiography is limited for evaluation of chest wall trauma .