Parameters optimization for vibration assisted biopsy insertion

Abstract

Abstract Different sampling parameters have a great effect on the results of vibration assisted biopsy insertion process. Further analysis of the influence degree and rule of each sampling parameter on a single target variable to obtain the optimal parameter combination is essential for guiding clinical application. In this study, vibration assisted insertion experiments were conducted using gel phantom as experimental material. The effect degree of insertion velocity, vibration frequency, needle diameter and tip surface number on the maximum insertion force and fiction force was researched through orthogonal tests. The experimental results were analyzed by the combination of extreme deviation analysis and variance analysis. Single-objective optimization of different insertion process parameters was carried out to obtain an optimal combination of parameters and the influence degree of each test factor on each index. The experiment results show that according to the degree of effect, the sampling parameters affecting the maximum insertion force from large to small are insertion velocity, needle diameter, vibration frequency and the number of the needle tip surface. The affecting the friction from large to small are insertion velocity, needle diameter, number of the needle tip surface and vibration frequency. The verification experiment result show that optimal parameter combination is reasonable in a certain range.