Application value of CHN bone age in judicial identification / 中国法医学杂志

ABSTRACT

Objective Probe application value of CHN(the standards of skeletal maturity of hand and wrist for Chinese-CHN method)bone age in judicial identification,and analyze factors and related problems which influence its accuracy.Methods 522 patients participated in judicial identification of living age estimation.Two posteroanterior radiographs for the left wrist were shot with respective exposure value for all patients.And two oblique radiographs were added.Bone ages were estimated according to CHN method.Result Among 522 cases were 489 males and 33 females.Bone ages of 129 males reached to tiptop of CHN-18.4 and average bone age of other male patients is 16.5.Bone ages of 14 females reached to tiptop of CHN-17.3 and average bone age of other female patients is 15.7.Among 522 cases there were 388 patients with their CHN bone ages above 16.0,about 74.3%.The group of data indicates that multiple factors can influence accuracy of bone age estimation.Among them change of radiograph position and angle influenced estimation accuracy most.Conclusion If radiographs of high quality can be acquired,CHN method can be proficiently used,and radiologists can pay attention to the effect on estimation accuracy of epiphysis classification by change of radiograph position and angle,then CHN bone age can mostly meet requirements of living age estimation.