It Introduces a new digital measuring equipment-Laser Radar,and its mmeasurement principle.Than it eelaborated in detail......

目的探讨儿童下颈椎椎弓根形态特征及其发育规律,为椎弓根螺钉内固定提供形态学依据。方法收集4~12岁儿童颈椎MSCT扫描资料60例,按......