フローティング機構を用いた針のたわみ抑制アルゴリズム

抄録

In recent years, interventional radiology (IR) which is a medical procedure has been attracting considerable attention. Since this surgical method is less invasive, but doctors are exposed to strong radiation in the case under CT-guidance. In order to overcome this problem, we developed remote-controlled IR assistance robot. We are currently developing an automated puncture system. Deviation of puncture point on body surface causes needle deflection during the automatic puncture. Because the needle deflection grows with the inserted depth, it makes the needle difficult to reach the target tumor. So as to solve them, the floating mechanism is developed to suppress needle deflection. Displacement sensor on floating mechanism can measure the movement of the floating part. In addition, the puncture reaction force can be measured by the force sensor on the robot. Algorithms to suppress the needle deflection using this information are proposed in this paper.