EPT has a potential for immediate clinical use since it does not require additional hardware. However, there are various problems when applying clinical practice. In the case of breast image, to overcome SNR, a reconstruction method called magnitude-weighted polynomial fitting was applied. Recently, a new phase-based technique called ‘gradient-based EPT’ (pgEPT) was proposed. This method removes the boundary artifact by adding a gradient of phase and reduce noise by adding diffusion term. But, it doesn’t work properly for low SNR. In this study, an improved pgEPT for breast conductivity by replacing the Laplacian term with polynomial fitting is proposed.