拇指掌腕关节前后１５°角投照法李强＊拇指骨及第一掌骨的常规前后位片，其掌骨基底部显示常不满意，本文介绍１种在常规前后位上加用１５°角投照，在显示第１掌骨基底部，腕掌关节时更佳，供同道参考。投照方法：患者面对摄影台正坐，前臂伸直，肘部用沙袋垫高，手和前... Thumb wrist before and after 15 ° projection method Li Qiang * The thumb and the first metacarpal anteroposterior film, the metacarpal basal is often not satisfied with this article describes a conventional plus 15 ° before and after the vote , In the first metacarpal basal ganglia, wrist joint better, for fellow reference. Projection method: the patient is sitting in front of the camera, forearm straight, elbows padded with sandbags, hands and front ...