MR-compatible biopsy needle with enhanced tip force sensing.
MR-compatible biopsy needle with enhanced tip force sensing.
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DOI：
10.1109/whc.2013.6548393
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发表时间：
2013-04
期刊：
影响因子：
--
通讯作者：
Moslehi B
中科院分区：
文献类型：
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作者：
Elayaperumal S;Bae JH;Christensen D;Cutkosky MR;Daniel BL;Costa JM;Black RJ;Faridian F;Moslehi B
我们描述了一种仪器化活检针，该活检针为医生提供了直接在针的内部管心针的尖端处感测相互作用力的能力。传感器由光纤布拉格光栅（FBG）组成，不受电磁场的影响;因此针适用于MR引导程序。与以前测量弯曲应变的仪器化针相比，新设计具有额外的传感器和尖端的一系列微加工孔。孔增加应变敏感性，特别是对轴向力，而不会显著降低刚度或强度。将使用新针头测得的动态力与使用针头底座处的力/扭矩传感器测得的动态力进行比较，结果表明，当针头套筒沿着存在显著摩擦时，尖端灵敏度的提高尤其明显。
We describe an instrumented biopsy needle that provides physicians the capability to sense interaction forces directly at the tip of the needle’s inner stylet. The sensors consist of optical fiber Bragg gratings (FBGs), and are unaffected by electromagnetic fields; hence the needle is suitable for MR-guided procedures. In comparison to previous instrumented needles that measure bending strains, the new design has additional sensors and a series of micro-machined holes at the tip. The holes increase strain sensitivity, especially to axial forces, without significantly reducing the stiffness or strength. A comparison of the dynamic forces measured with the new needle and those obtained using a force/torque sensor at the needle base shows that the enhanced tip sensitivity is particularly noticeable when there is significant friction along the needle sleeve.