Abstract

Info

Title:: Establishment and comparison of multi-trajectory models of flexible puncture needle based on image processing

Author(s):: BAI Huiquan1; GAO Dedong2; SONG Yanqing3; 1. Equipment Department, Xining First Peoples Hospital, Xining 810000, China 2. School of Mechanical Engineering, Qinghai University, Xining 810000, China 3. Haidong Water Authority, Haidong 810600, China

Keywords:: Keywords: needle puncture morphology least square method curve fitting residual optimal solution

Abstract:: Abstract: A method of establishing the motion trajectory model of flexible puncture needle based on image processing is proposed to accurately measure the motion track of the flexible needle during needle insertion. The dynamic images of needle insertion are collected through the camera system, and the position coordinates of the flexible needle tip during needle insertion are extracted using the image processing morphology technology. Based on the extracted needle tip data, the least square method is employed for curve fitting, and the second-order polynomial model, exponential function model, and bicycle model are established. The analysis on the goodness of fit, residual, and residual sum of squares of different models reveals that the second-order polynomial model is superior to the other two models in exploring the optimal solution of the trajectory model of flexible puncture needle.