Directional bias of soft-tissue artifacts on the acromion during recording of 3D scapular kinematics
Directional bias of soft-tissue artifacts on the acromion during recording of 3D scapular kinematics
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DOI：
10.1016/j.jbiomech.2018.03.005
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发表时间：
2018-05-17
影响因子：
2.4
通讯作者：
Sugamoto, Kazuomi
中科院分区：
文献类型：
--
作者：
Konda, Shoji;Sahara, Wataru;Sugamoto, Kazuomi
运动表演期间的肩胛骨运动学可以使用附接到覆盖肩峰的皮肤的皮肤安装的跟踪器来记录，以用于连续的数据收集，而不限制受试者相对于限制其用于宽范围或高速运动的医学成像分析的自然运动。本研究旨在描述使用3D磁共振成像（3D-MRI）协议的皮肤安装跟踪器的平移和旋转误差中存在的方向偏差。在12个手臂位置采集19名男性健康右肩的3D-MRI扫描。肩胛骨配置的相对变换被确定为测量误差，如模仿皮肤安装追踪器的小立方体的配置相对于通过基于体素的配准测量的实际肩胛骨配置所记录的。这些测量误差用正值或负值表示，以描述偏倚。外侧、前侧和上级方向的总体平移误差分别为3.7 +/- 8.4 mm、9.5 +/- 6.4 mm和6.2 +/- 4.6 mm。前伸、向上旋转和后倾的总体旋转误差分别为7.8 ± 8.4度、0.2 ± 7.4度和-4.0 ± 7.5度。安装在皮肤上的追踪器显示出在前上方（93%和91%）方向上的位移概率很高，并且相对于底层骨的位置以延长方式（82%）旋转，其变化具有渐进性。方向偏差的存在及其逐渐变化表明测量误差具有统计学可预测性，可用于预测准确的肩胛骨平移和旋转。关键词：皮贴追踪器肩关节生物力学。(C)2018爱思唯尔有限公司版权所有。
Scapular kinematics during sports performances can be recorded using skin-mounted trackers attached to the skin overlying the acromion for continuous data collection without restricting natural motions of the subject relative to medical imaging analyses limiting its use for wide-range or high-speed motions. This study aimed to describe the existence of a directional bias in the translational and rotational errors of skin-mounted trackers using a 3D magnetic resonance imaging (3D-MRI) protocol. 3D-MRI scans of the healthy right shoulders of 19 males were acquired in 12 arm positions. The relative transformation of the scapular configuration determined to be the measurement error, as recorded by the configuration of the small cuboid imitating a skin-mounted tracker relative to the actual scapular configuration measured by the voxel-based registration. These measurement errors were expressed with either positive or negative values to describe the bias. Overall translational errors in the lateral, anterior, and superior directions were 3.7 +/- 8.4 mm, 9.5 +/- 6.4 mm, and 6.2 +/- 4.6 mm, respectively. Overall rotational errors in protraction, upward rotation, and posterior tilt were 7.8 +/- 8.4 degrees, 0.2 +/- 7.4 degrees, and -4.0 +/- 7.5 degrees, respectively. The skin-mounted tracker displayed a high probability of displacement in antero-superior (93% and 91%) directions and rotates in a protracting manner (82%) relative to the position of the underlying bone with the gradual nature of its change. The existence of the directional bias with its gradual change suggests a statistical predictability in measurement errors, which can be used to predict accurate scapular translation and rotation. Keywords: Skin-mounted tracker Shoulder Biomechanics. (C) 2018 Elsevier Ltd. All rights reserved.