19世纪末期Boas首次提出“生长速度(tempo ofgrowth)”的概念。伦琴1895年发现X线后,这一概念很快被用于骨发育的研究,即观察骨化中心在一定年龄的出现数目等。1937年由梁铎公布了对手腕部骨化中心的观察结果,以后许多学者研究制定了我国小儿骨龄的标准。近年来有少数学者应用 Boas first proposed the concept of “tempo of growth” in the late 19th century. After Roentgen discovered X-ray in 1895, this concept was soon applied to the study of bone development, that is, to observe the number of ossification centers at a certain age. In 1937, Liang Duo published the observation results on the ossification center of the wrist. After that, many scholars studied and set the standard of the pediatric bone age in our country. In recent years, a few scholars apply