Sandler P J
Institute of Dental Surgery, London.
Br J Orthod. 1988 Feb;15(1):17-21. doi: 10.1179/bjo.15.1.17.
The purpose of this study was to assess the contribution to tracing error of positioning the patient within the cephalostat. It was carried out by comparing the differences between repeated measurements from two 'same day' radiographs, with the differences between measurements from two tracings of the same radiograph.
本研究的目的是评估患者在头颅定位仪内的定位对追踪误差的影响。通过比较同一天两张X光片重复测量之间的差异，以及同一张X光片两次描图测量之间的差异来进行研究。
