Breen A, Allen R, Morris A
Anglo-European College of Chiropractic, Dorset, UK.
J Med Eng Technol. 1989 Jan-Apr;13(1-2):109-13. doi: 10.3109/03091908909030208.
The kinematic behaviour of the vertebral segments under the influence of spinal injury and other mechanical problems is difficult to quantify in patients. This paper describes the use of a calibration model and human subjects to investigate the accuracy of a method for determining lumbar intervertebral rotations using images digitized from an image intensifier. The main influences were found to be observer error in marking co-ordinates, scaling of the image presented by the computer's monitor, distortion caused by out-of-plane images and loss of image quality as a result of scattered radiation from the soft tissues. The technique may be valuable in the light of its efficiency and low X-ray exposure to patients.
在脊髓损伤和其他机械问题影响下，患者椎体节段的运动行为难以量化。本文描述了使用校准模型和人体受试者来研究一种利用从影像增强器数字化的图像确定腰椎椎间旋转方法的准确性。主要影响因素包括坐标标记中的观察者误差、计算机显示器呈现图像的缩放、平面外图像引起的失真以及软组织散射辐射导致的图像质量损失。鉴于其效率和对患者低剂量的X射线照射，该技术可能具有重要价值。
