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The authors propose a new electrode mode for magnetic detection electrical impedance tomography (MDEIT). MDEIT is a new EIT imaging technique that aims to reconstruct the conductivity distribution using the external magnetic flux density. Based on the forward solver and image reconstruction algorithms, the feasibility of a new electrode mode, called annular electrode mode, is tested. The simulation experiments' results show that this electrode mode can produce a similar effect with the longitudinal current, making the z direction current density image on the xy plane consistent with the corresponding conductivity image. With the electrode mode, we can infer the conductivity distribution from the current density image. Consequently, MDEIT can be simplified to magnetic detection current density imaging (MDCDI) shortening the data measurement time and image reconstruction time and making a step towards developing MDEIT as a rapid imaging technique.