Objective To explore the imaging signs of malignant tumors of the jaws,and to compare shortage,advantage and complemen of ordinary X ray film,CT and 3D CT.

• 目的 探索颌骨恶性肿瘤影像学的征象特点,常规X线、CT和三维CT三种检查方式对颌骨病变显示的优缺点及互补点。