Hardy D C, Totty W G, Reinus W R, Gilula L A
J Hand Surg Am. 1987 Jul;12(4):504-8. doi: 10.1016/s0363-5023(87)80196-x.
Proper interpretation of wrist radiography requires a standardized radiographic technique. We obtained posteroanterior (PA) radiographs of the wrist in nine patients in three different arm positions to study the effect of arm position on ulnar styloid process orientation. An appearance simulating a normal anteroposterior (AP) wrist radiograph was present in six of nine PA radiographs when the arm was positioned next to the trunk, and the elbow was flexed to a 90% angle. The orientation of the ulnar styloid was not helpful in differentiating either pronated from supinated wrist positions or AP from PA projections. We concluded that radiographic screening of the carpus should be performed with standardized wrist positioning and nomenclature as described in modern radiographic technological texts. Supplemental projections should be exposed and interpreted with an understanding of the position of the arm and the direction of the incident radiographic beam at the time of examination.
正确解读腕部X线片需要标准化的放射摄影技术。我们让9名患者在三种不同的手臂位置拍摄腕部后前位（PA）X线片，以研究手臂位置对尺骨茎突方向的影响。当手臂靠近躯干放置，肘部弯曲成90°角时，9张PA X线片中的6张呈现出类似正常腕部前后位（AP）X线片的影像。尺骨茎突的方向对于区分腕部旋前与旋后位置或AP与PA投照并无帮助。我们得出结论，腕关节的X线筛查应按照现代放射摄影技术文献中所述的标准化腕部定位和命名法进行。在检查时，应在了解手臂位置和入射X线束方向的基础上进行补充投照并解读。
