In-vivo coordinate measurement based on electric field location system

Based on external electric field, the potential distribution of homogeneous medium is analyzed for measuring in-vivo coordination. According to various electrical impedance models, corresponding regularity of electric potential gradient within constant electric field is researched. The algorithm procedure for spatial location measurement is developed accurately by using Fast Fourier Transform. Through experimental results, it can be concluded that the maximum deviation and dimensional relative error are all in allowable level. This method can provide proper registration accuracy for in-vivo coordinates measurement. Furthermore, it can provide technical support for endocardial three-dimensional mapping.