K. Yan, W.S. Ng (Singapore), T.-I. Liu, Y. Yu, and T. Podder (USA)
Precise needle placement is vital for the success of a wide variety of percutaneous surgical procedures. Insertions into soft tissues can be difficult to learn and to perform, due to tissue deformation, needle deflection and limited visual feedback. This paper proposes a novel approach, high frequency translational oscillation of the needle to reduce the target movement. Experiments have been carried out in pure gelatin phantom and chicken breast respectively to test its effectiveness. Results have shown that high frequency translational oscillation can effectively reduce target movement in different kinds of phantom and chicken breast. But the corresponding optimal settings may be different for different types of tissue/phantom due to the factor interactions. In the near future, experiment will be carried out using RSM (Root Mean Square) to investigate the optimum factor settings for phantoms representing fat, muscle and prostate respectively that the needle will thrust through during prostate biopsy operation.
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