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目的对立体定向脑图谱的基准点进行测定研究,为构建临床立体定向脑手术提供基础。方法在立体定向空间坐标系内,应用MR扫描图像处理技术对120例健康自愿者和应用解剖学技术对30例尸脑分别进行脑内基准点前连合(AC)、后连合(PC)的径值和前后连合间距(ICD)进行测量。结果在立体定向空间内,无论在大体标本,还是在MR图像上,AC、PC均清晰可见;在尸脑上测得AC的前后径为(2.75±0.76)mm,上下径为(3.85±0.68)mm,PC的前后径为(1.87±0.58)mm,上下径为(2.48±0.64)mm,ICD长度为(22.68±1.46)mm;在健康自愿者测得AC的前后径为(2.80±0.32)mm,上下径为(3.82±0.37)mm,PC的前后径为(1.76±0.30)mm,上下径为(2.30±0.45)mm,ICD长度为(23.84±1.32)mm。结论通过尸脑与健康正常人脑的对比测量研究,在立体定向坐标系内脑内AC、PC是脑内准确定位的基准点,AC-PC是恒定的参考线。
OBJECTIVE To study the determination of stereotactic brain atlas, and to provide a basis for the construction of clinical stereotactic brain surgery. Methods In stereotactic space coordinate system, 120 cases of healthy volunteers and applied anatomical techniques were applied to MR images of 30 corpses to conduct precontraction (AC), postconsumption (PC) Of the diameter and anterior and posterior commissure spacing (ICD) were measured. Results In the stereotactic space, both AC and PC were clearly seen in both gross and MR images. The anteroposterior diameter of AC was (2.75 ± 0.76) mm and the upper and lower diameter were (3.85 ± 0.68) ) mm. The anteroposterior diameter of PC was (1.87 ± 0.58) mm, the upper and lower diameter was (2.48 ± 0.64) mm and the length of ICD was (22.68 ± 1.46) mm. The anteroposterior diameter of AC measured by healthy volunteers was (2.80 ± 0.32) ) mm, and the diameter of upper and lower sides was (3.82 ± 0.37) mm. The anteroposterior diameter of PC was (1.76 ± 0.30) mm, the diameter of upper and lower sides was (2.30 ± 0.45) mm, and the length of ICD was (23.84 ± 1.32) mm. CONCLUSIONS: Comparing the brain of corpses with that of normal healthy subjects, AC and PC in the stereotactic coordinate system are the reference points for accurate brain localization. AC-PC is a constant reference line.