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首页> 外文会议>Mediterranean Conference on Medical and Biological Engineering and Computing >Improved Splines Fitting of Intervertebral Motion by Local Smoothing Variation
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Improved Splines Fitting of Intervertebral Motion by Local Smoothing Variation

机译：通过局部平滑变化改进椎间动作的花键拟合

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Knowledge of intervertebral motion provides important information about the level of stabilization of a single spine segment. By using X-ray fluoroscopy it is possible to screen spinal motion during spontaneous patient's movement. Discrete-time experimental measurements can be interpolated by smoothing splines, which provide both noise reduction and continuous-time representation of joint motion. A patient, albeit trained, is unable to perform a spontaneous movement with such regularity to keep constant certain parameters such as the speed. Therefore, spontaneous motion can include different tracts performed at different speed. The use of a single smoothing parameter to fit the entire motion for spline fitting requires a compromise. Alternatively, smaller differences with the experimental data and more stable motion parameters can be obtained by appropriately varying the smoothing parameter: less smoothing is applied in higher velocity tracts. This concept has been applied to the analysis of cervical intervertebral motion as obtained by processing sequences of fluoroscopic images. Preliminary results showed more close representation of the experimental data without missing the regular progression of the joint movement.
机译：椎间动作的知识提供了关于单个脊柱段的稳定水平的重要信息。通过使用X射线透视透视，可以在自发患者的运动期间筛选脊柱运动。通过平滑花键可以插补离散时间的实验测量，这提供了降噪和关节运动的连续时间表示。患者虽然训练有素，但是无法使用这种规律性执行自发运动，以保持恒定的某些参数，例如速度。因此，自发运动可以包括以不同速度执行的不同暗物。使用单个平滑参数来适合花键配件的整个运动需要妥协。或者，可以通过适当地改变平滑参数来获得与实验数据和更稳定的运动参数的较小差异：在更高的速度截面中施加更少的平滑。该概念已应用于通过处理荧光透视图像序列而获得的宫颈椎间运动的分析。初步结果表明，实验数据更近的代表性，而不会缺少联合运动的常规进展。

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