Beisenova, AidanaIssatayeva, AizhanAshikbayeva, ZhannatJelbuldina, MadinaAitkulov, ArmanInglezakis, VassilisBlanc, WilfriedSaccomandi, PaolaMolardi, CarloTosi, Daniele2021-09-152021-09-152021-01-27Beisenova, A., Issatayeva, A., Ashikbayeva, Z., Jelbuldina, M., Aitkulov, A., Inglezakis, V., Blanc, W., Saccomandi, P., Molardi, C., & Tosi, D. (2021). Distributed Sensing Network Enabled by High-Scattering MgO-Doped Optical Fibers for 3D Temperature Monitoring of Thermal Ablation in Liver Phantom. Sensors, 21(3), 828. https://doi.org/10.3390/s21030828http://nur.nu.edu.kz/handle/123456789/5778Thermal ablation is achieved by delivering heat directly to tissue through a minimally invasive applicator. The therapy requires a temperature control between 50–100 °C since the mortality of the tumor is directly connected with the thermal dosimetry. Existing temperature monitoring techniques have limitations such as single-point monitoring, require costly equipment, and expose patients to X-ray radiation. Therefore, it is important to explore an alternative sensing solution, which can accurately monitor temperature over the whole ablated region. The work aims to propose a distributed fiber optic sensor as a potential candidate for this application due to the small size, high resolution, bio-compatibility, and temperature sensitivity of the optical fibers. The working principle is based on spatial multiplexing of optical fibers to achieve 3D temperature monitoring. The multiplexing is achieved by high-scattering, nanoparticle-doped fibers as sensing fibers, which are spatially separated by lower-scattering level of single-mode fibers. The setup, consisting of twelve sensing fibers, monitors tissue of 16 mm × 16 mm × 25 mm in size exposed to a gold nanoparticle-mediated microwave ablation. The results provide real-time 3D thermal maps of the whole ablated region with a high resolution. The setup allows for identification of the asymmetry in the temperature distribution over the tissue and adjustment of the applicator to follow the allowed temperature limits.enAttribution-NonCommercial-ShareAlike 3.0 United StatesType of access: Open Accessdistributed sensingnanoparticles doped fibersoptical fiberstemperature monitoringthermal ablationArticle