目的：通过骶髂关节及相关的解剖观测，为半盆脱位骶髂关节穿钉固定术提供临床应用依据。
Objective: To observe and measure the Sacro-iliac joint and correlative parts for clinical reference in Hemipelvic dislocation internal fixation by double head hollowed screw.
选男女各30例增强扫描后的盆段CT横断层片，测量输尿管与髂血管和腰、骶椎的位置和距离。
To choose 30 cases of male and female enhanced scanning pelvis CT and measure the location and the distance between ureter and iliac blood vessel and lumbosacral vertebra.
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