Granot et al recently described the use of three dimensional electrical impedance tomography (EIT) for real time monitoring of IRE, with histological analysis showing good correlation between the extent of tissue damage caused by IRE and EIT images. They report that EIT is the only imaging technique based on a measurement principle that is directly influenced by the electroporation phenomenon through measuring passive electrical properties of tissues. They argue that EIT may be the only feasible candidate for real time imaging of electroporation with feedback control purposes because other techniques, such as US, detect the indirect consequences of electroporation and thus may be too slow for a feedback scheme