Capo J T, Accousti K, Jacob G, Tan V
Department of Orthopaedics, Division of Hand and Microvascular Surgery, UMDNJ - New Jersey Medical School, Newark, NJ, USA.
J Hand Surg Eur Vol. 2009 Apr;34(2):166-72. doi: 10.1177/1753193408090393. Epub 2009 Jan 7.
This study evaluates the effect of rotational malposition of the wrist on measured radiographic parameters of the distal radius and carpus. Ten wrists from five healthy volunteers were imaged in varying degrees of rotation. The wrists were placed in a custom, calibrated jig and images were taken in 5 degrees increments to a maximum pronation and supination of 20 degrees . The results demonstrate the following: a steady decrease in the scapholunate and radioscaphoid angles with extremes of supination; an increase in palmar tilt with supination and a decrease in palmar tilt with pronation. The palmar tilt varied from -4 degrees to 15 degrees and the scapholunate angle ranged from 48 degrees to 29 degrees at the extremes of rotation. These results demonstrate how malrotation in X-ray positioning can have a significant effect on the apparent alignment of the distal radius and carpal bones. Measurements taken from poor X-rays typically fall outside the normal range and could adversely effect treatment decisions.
本研究评估手腕旋转不良对桡骨远端和腕骨的测量影像学参数的影响。对来自五名健康志愿者的10只手腕进行不同程度旋转的成像。将手腕置于定制的校准夹具中，以5度增量拍摄图像，最大旋前和旋后角度为20度。结果表明：在极端旋后时，舟月角和桡舟角稳步减小；旋后时掌倾角增加，旋前时掌倾角减小。在旋转极端情况下，掌倾角从-4度到15度不等，舟月角从48度到29度不等。这些结果表明X线定位中的旋转不良如何对桡骨远端和腕骨的明显对线产生显著影响。从质量差的X线片上进行的测量通常超出正常范围，可能会对治疗决策产生不利影响。
