1. A medical electro-thermal imaging method, comprising the steps of: a. preparing a patient and the imaging room according to a thermal imaging standards; b. recording of a passive thermal image of the tissue in two different windows (MWIR and LWIR) using a dual band thermal camera; c. placing a plurality of non-invasive electrodes to the specified locations on the surface of the breast tissue; d. selecting frequency of an electric current that is inserted to the breast tissue using the control unit; e. applying the electric current to the targeted breast tissue for predetermined time period; f. recording an active thermal image of the stimulated area in, heating period (in both windows (MWIR and LWIR)); g. recording the active thermal image of the stimulated area in cooling period (in both windows (MWIR and LWIR)) until the temperature of the breast tissue becomes stable; h. going to the item c and repeating the same procedure for different frequency values of the applied electric current; i. eliminating the position differences of the active thermal image and the passive thermal image and matching the active thermal image and the passive thermal image (image registration); j. obtaining the absolute temperature value of the breast and cancerous tissue for any screening time period using the dual band property of the thermal camera; k. comparing and determining the ratio/difference of the active thermal image and the passive thermal image (in single band and dual band imaging modes) obtained under different frequencies using the image processing algorithm which is embedded in the control unit to detect the cancerous tissue (tumor tissue); l. if the active thermal image is not enough to make a healthy diagnosis for the presence of the tumor after changing the frequency of the electric current or the positions of the electrodes; carrying out the previous d, e, f, g, h, i, j, k and l steps until a healthy diagnosis or detection is made; wherein the decision in this sense is made with the help of the algorithm embedded in the control unit; and wherein the patients disrobe to the waist and let the surface of the breasts cool to room temperature of 18-22° C. for 10-15 minutes.