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目的：探讨婴儿髋关节骨顶比值超声测量法的临床意义。方法研究对象为2011年2月至2015年12月，超声检查的6个月以下婴儿髋关节180例(髋)，根据α角大小分为3组：A 组α角≥60°； B 组α角＜60°～≥43°；C 组α角＜43°，每组60例。每个观察对象均在 Graf 法测量以后，再测量骨顶比值，然后对照两种测量方法所测结果。结果 A 组60例，α角 78.38°～60.00°，均值(66.43±4.06)°，骨顶比值3.71～1.06，均值1.70±0.56；B 组60例，α角＜60.00°～≥43.00°，均值(51.24±5.31)°，骨顶比值1.20～0.56，均值0.84±0.15；C 组60例，α角＜43.00°～30.00°，均值(36.71±6.36)°，骨顶比值0.60～-0.36，均值0.16±0.25。骨顶比值测量法将髋关节分为3型，即 I 型髋关节、II 型髋关节和偏心型髋关节。I 型：骨顶比值＞1.2，II 型：骨顶比值1.2～0.6，偏心型：骨顶比值＜0.6。结论骨顶比值与 Graf 法有明显的一致性，髋关节发育良好时，α角大，β角小，骨顶比值大；髋关节发育差时，α角小，β角大，骨顶比值小。骨顶比值超声测量法，测量点比较明确，划线方法容易掌握，不受骨缘区形态的影响，可以作为 Graf 法测量的一种辅助方法，与 Graf 法等测量方法可作为互补。“,”Objective To evaluate the clinical signiifcance of hip joint bony roof ratio ultrasound measurement of the children.Methods From February 2011 to December 2015, 180 infant cases were studied. They were divided into 3 groups based on the size of Graf angle alpha. Group A, angle alpha 60°; Group B, angle alpha < 60° - 43°; Group C, angle alpha < 43°; 60 cases in each group. Each was measured by Graf, and then by bony roof ratio. Results of the 2 measures were analyzed.Results Group A: angle alpha 78.38° - 60.00° and the average was ( 66.43 ± 4.06 ) °; the bony roof ratio ranged from 3.71 to 1.06, the average was 1.70 ± 0.56. Group B: angle alpha < 60.00° - 43.00°, and the average was ( 51.24 ± 5.31 ) °; the bony roof ratio ranged from 1.20 to 0.56, and the average was 0.84 ± 0.15. Group C: angle alpha 1.2; type II, bony roof ratio 1.2 - 0.6; Eccentric hip, bony roof ratio < 0.6. Conclusions The bony roof ratio and Graf measurements must be combined with hip morphology. Well-developed hip: big angle alpha, small angle β, big bony roof ratio; not-well-developed hip: small angle alpha, big angle β, small bony roof ratio. The bony roof ratio ultrasonic method: measurement point is clear, line drawing method is easy to be mastered, not affected by the morphology of the bony rim. It can be used as an auxiliary method of Graf measurement.