A compact dosimetric system for MOSFETs based on passive NFC tag and smartphone Carvajal Rodríguez, Miguel Ángel Escobedo Araque, Pablo Jiménez-Melguizo, M. Martínez-García, María S. Martínez Martí, Fernando Martínez Olmos, Antonio Palma López, Alberto José The authors acknowledge the Servicio de Radiofísica (Radio-physics Service) of the Hospital Universitario San Cecilio (Granada, Spain) for permitting us to use their installations. This work was funded by the Spanish Government under project FPA2015-67694-P (Spanish Ministry of Economy, Industry and Competitiveness) and a R&D predoctoral grant (FPU13/05032, Spanish Ministry of Education, Culture and Sport). This project is partially supported by European Regional Development Funds (ERDF). In this work we describe and evaluate a dosimetric system based on an NFC (Near Field Communication) tag and a smartphone that uses commercial MOSFETs as radiation sensors. The tag is designed with commercial integrated circuits and the smartphone is the power source of the tag configured as a readout unit, user interface and storage unit. The NFC tag is supplied wirelessly by the smartphone via NFC, using a home-made structure to align the tag coil and smartphone coil in order to achieve a good inductive coupling. In this case, the commercial DMOS transistor ZVP3306 is used as dosimeter in unbiased mode, connected to the tag before and after each irradiation session to perform the sensor reading. An evaluation of the dosimetric system has been carried out irradiating three transistors with photon beam of 6 MV up to 20 Gy. The average sensitivity found is (4.75 ± 0.15) mV/Gy, which is in good agreement with the results found with our previously developed dosimetric system. Therefore, this miniaturised dosimetric system can be considered as a promising and low cost electronic architecture to be used for dosimetry control in radio-therapy treatments. 2023-01-16T11:18:11Z 2023-01-16T11:18:11Z 2017-11-01 info:eu-repo/semantics/article https://hdl.handle.net/10481/79019 10.1016/j.sna.2017.10.015 eng http://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License