Bone landmark suprasternal notch(胸骨上切迹) o clavicle(锁骨) ● Manubrium sterni(胸骨柄) ● Sternal angle((胸骨角)Louis angle 0 suprabdominal angle(腹上角) ● xiphoid process(剑突) Ribs interspaces scapula(肩胛骨) spinous process(棘突) costolspinal angle(肋脊角)l suprasternal notch(胸骨上切迹) l clavicle（锁骨） l Manubrium sterni(胸骨柄) l Sternal angle(胸骨角) Louis angle l suprabdominal angle(腹上角) l xiphoid process(剑突) l Ribs & interspaces l scapula(肩胛骨) l spinous process(棘突) l costolspinal angle(肋脊角)