臨床的骨科或外科，對於前臂、肘部及腕部相關的診斷技術中，常規X 射線(X-ray)的前臂側位攝影檢查，非常普遍可見。目前所見的資料，對於影像中，肱骨內上髁與外上髁之間的關係，多認為兩者應是完全重疊的。本實驗運用X 射線的前臂側位成像技術，改變中心射束(CR)與肱骨內、外上髁間的距離，分別攝影成像後，再進行檢測。實驗結果顯示前臂側位影像中，肱骨內上髁與外上髁並不會重疊，而是兩者明顯分離。

In clinical orthopedics or surgery, for the diagnosis of the forearm, elbow and wrist, X-ray radiography of lateral forearm is common. According to the current data, the relationship between the medial epicondyle and the lateral epicondyle of the humerus in the image is mostly considered to be completely superimposed. This experiment changes the distance between the central ray (CR) and the epicondyles of the humerus, then imaging and inspection separately. Experimental results show that in the lateral image of the forearm, the medial epicondyle and lateral epicondyle of the humerus do not superimpose, but they are clearly separated.