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1·The original image is the fragment roentgenogram obtained with flash X-ray cineradiography.

它采用的原始图象由闪光X光照相获得。

2·Objective To discuss the significance of stress roentgenogram on diagnosis of chronic instability of lateral ankle and. bring forward the radiology diagnosis criteria.

目的探讨应力位片在慢性外踝关节不稳定诊断中的意义，提出影像学的定量诊断方法。

3·Destruction of spheno-occipital bone can be found in roentgenogram. It is difficult to distinguish chondroid chord?oma from chordoma and chondrogenic tumors which occur in this region.

本病与发生于颅底的脊索瘤和软骨源性肿瘤不易鉴别，组化染色与电镜检查对鉴别诊断有帮助。