Trocmé M C, Sather A H, An K N
Section of Orthodontics, Mayo Clinic, Rochester, Minn.
Am J Orthod Dentofacial Orthop. 1990 Aug;98(2):168-75. doi: 10.1016/0889-5406(90)70011-Z.
A biplanar cephalometric stereoradiography (BCSR) technique was developed for accurate three-dimensional assessment of structures that can be identified by markers or anatomical landmarks that are visible on both lateral closed and posteroanterior cephalometric radiographs. The accuracy and precision of the technique were determined by means of a phantom and clinical radiographs. On the phantom, three-dimensional coordinates were determined by the BCSR technique and were measured directly with an electronic digital caliper. The accuracy of the BCSR technique was found to be within 0.5% of the measured distances. On clinical radiographs, the lengths of plates and screws, used as rigid fixation devices, were measured on two subsequent sets of biplanar radiographs and were found to be within the accuracy of our current digitizer (+/- 0.381 mm). The stability of interosseous wires was tested against implants and other interosseous wires on two subsequent sets of biplanar radiographs through a comparison of the distances between two devices. These comparisons confirmed the stability of interosseous wires. The BCSR technique proved to be an accurate method for measurements in three dimensions.
一种双平面头颅测量立体放射摄影（BCSR）技术被开发出来，用于对可通过在侧位闭口和后前位头颅测量X线片上可见的标记物或解剖标志来识别的结构进行精确的三维评估。该技术的准确性和精密度通过模型和临床X线片来确定。在模型上，通过BCSR技术确定三维坐标，并用电子数字卡尺直接测量。发现BCSR技术的准确性在测量距离的0.5%以内。在临床X线片上，对用作刚性固定装置的接骨板和螺钉的长度在两组连续的双平面X线片上进行测量，发现其在我们当前数字化仪的精度范围内（±0.381毫米）。通过比较两个装置之间的距离，在两组连续的双平面X线片上测试了骨间钢丝相对于植入物和其他骨间钢丝的稳定性。这些比较证实了骨间钢丝的稳定性。BCSR技术被证明是一种用于三维测量的准确方法。
