骨细微病变放大摄影

The Macrophotography of Bone Microlesion

本文报告了300例骨细微病变放大摄影。使用高速旋转阳极X线管，焦点为0．3mm，焦─肢距110cm，肢──胶距66cm。放大摄影病变显示率与一般摄影相比明显提高．骨细微结构，骨小梁，病变边缘，软组织轮廓等均清晰。放大摄影放大率有一定限度，不可一味追求放大而使影像模糊。如设备条件具备，可同时使用开孔遮线板．实践证明，双重速线装置可以提高照片清晰度，为早期细微病变提供可靠诊断资料。

300 cases of the bone microlesion macrophotography were reported. High-spinned anode xray tube was used. The focal spot is 0. 3mm;focus-limb distance is 110cm; limb-film is 66cm. The macrophotography is better in demonstrating microlesion than conventional radiography,including bone microstructure,trabecula.the margin of lesion, the outline of soft tissue and so on. The magnification,however is limited. The larger the magnifying power,the more indistinct the radiogram. If the apparatus is well enough,the shield with po1es can be used to improve the sharpness and provide available diagnostic informations for early bone microlesion.