Erratum Electrical characterization of bolus material, as phantom for use in electrical impedance and computed tomography fusion imaging J Electr Bioimp, 5, 34-39, 2014 Parvind K Grewal 1, 2, Majid Shokoufi 1, Jeff Liu 2, Krishnan Kalpagam 2 and Kirpal S Kohli 2, 3 1. Mechatronic Systems Engineering, Simon Fraser University, Surrey, Canada 2. Fraser Valley Cancer Centre, Surrey, Canada 3. E-mail any correspondence to: kkohli@bccancer.bc.ca Received 11 Dec 2013 Published: 26 April 2014 doi: 10.5617/jeb.781 We would like to draw your attention to an error that was recently discovered in our publication [1] Electrical characterization of bolus material as phantom for use in electrical impedance and computed tomography fusion imaging. The composition of Superflab was mentioned to be “100% Akton® polymer” which is not correct. As Superflab is a proprietary product, therefore its composition is not known. A few sources [2-3] mention it to be vinyl plastic w/diisodecylphthalate or Di (2-Ethylhexyl) Phthalate[4]. The authors would like to clarify that Superflab has been used to perform the study, Akton® polymer has not been used to perform the study. It should be noted that the correction does not affect the results or conclusion of the paper. 1. P. Grewal, M. Shokoufi, J.Liu, K. Kalpagam and K. Kohli, ‘Electrical Characterization of Bolus material, as Phantom for use in Electrical Impedance and Computed Tomography fusion Imaging’ Journal of Electrical Bioimpedance, vol. 5, pp. 34-39, 2014. 2. J.P. Kirkpatrick, F.R. Demehri, S. E. Johnston, A.M. Stalnecker, T.M. Cooney, ‘Bolus materials for radiation therapy and methods of making and using the same’ US Patent US20080123810 A1, May 29 2008. 3. T.M. Cooney, F. Irani, A.M. Stalnecker and Sara Johnston, ‘Development of a Novel Bolus Material for Radiation Therapy’ Duke University, BME 227. Client: Dr. John Kirkpatrick, Department of Radiation Oncology, February 10, 2006 4. Mick Radio-Nuclear Instruments, Inc “Material Safety Data Sheet Superflab Bolus Material”