一种用于在生理CT成像过程中减少轴向移动和重新定位误差的新型头部固定器。
A new head holder for reducing axial movement and repositioning errors during physiological CT imaging.
作者信息
Shrawder S, Lapin G D, Allen C V, Vick N A, Groothuis D R
机构信息
Department of Biomedical Engineering, IL 60201.
出版信息
J Comput Assist Tomogr. 1994 Mar-Apr;18(2):329-36. doi: 10.1097/00004728-199403000-00036.
OBJECTIVE
We designed a new head holder for immobilization and repositioning in dynamic CT studies of the brain.
MATERIALS AND METHODS
A customized thermoplastic face mask and foam head rest were made to restrict movement of the head in all directions, but particularly out of the axial plane (z-movement).
RESULTS
This design provided a rigid, detailed mold of the face and back of the head that minimized motion during lengthy CT studies and enabled accurate repositioning of the head for follow-up studies. Markers applied directly to the skin were used to quantify z-movement.
CONCLUSION
When tested on 12 subjects, immobilization was limited to < 2.0 mm under worst-case conditions when the subject was asked to attempt forced movements. Repositioning was accurate to < 1.5 mm when the subject was removed from the head holder and then placed back into it.
目的
我们设计了一种新型头部固定器，用于脑部动态CT研究中的固定和重新定位。
材料与方法
制作了定制的热塑性面罩和泡沫头枕，以限制头部在各个方向的移动，尤其是在轴向平面外的移动（z轴移动）。
结果
该设计提供了头部面部和后部的刚性、详细模具，在长时间的CT研究中使运动最小化，并能为后续研究对头进行精确重新定位。直接应用于皮肤的标记物用于量化z轴移动。
结论
在12名受试者身上进行测试时，在最坏情况下，即要求受试者尝试强制移动时，固定限制在<2.0毫米。当受试者从头部固定器中取出然后再放回时，重新定位的精度达到<1.5毫米。
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