TY - JOUR N2 - Magnetic nanoparticle’s different applications in nanomedicine, due to their unique physical properties and biocompatibility, were intensively investigated. Recently, Fe₃O₄ nanoparticles, are confirmed to be the best sonosensitizers to enhance the performance of HIFU (high intensity focused ultrasound). They are also used as thermo-sensitizers in magnetic hyperthermia. A new idea of dual, magneto-ultrasound, coupled hyperthermia allows the ultrasound intensity to be reduced from the high to a moderate level. Our goal is to evaluate the enhancement of thermal effects of focused ultrasound of moderate intensity due to the presence of nanoparticles. We combine experimental results with numerical analysis. Experiments are performed on tissue-mimicking materials made of the 5% agar gel and gel samples containing Fe₃O₄ nanoparticles with φ  = 100 nm with two fractions of 0.76 and 1.53% w/w. Thermocouples registered curves of temperature rising during heating by focused ultrasound transducer with acoustic powers of the range from 1 to 4 W. The theoretical model of ultrasound-thermal coupling is solved in COMSOL Multiphysics. We compared the changes between the specific absorption rates (SAR) coefficients determined from the experimental and numerical temperature rise curves depending on the nanoparticle fractions and applied acoustic powers.We confirmed that the significant role of nanoparticles in enhancing the thermal effect is qualitatively similarly estimated, based on experimental and numerical results. So that we demonstrated the usefulness of the FEM linear acoustic model in the planning of efficiency of nanoparticle-mediated moderate hyperthermia. L1 - http://www.czasopisma.pan.pl/Content/119619/PDF/31_01873_Bpast.No.69(3)_24.06.21_Druk.pdf L2 - http://www.czasopisma.pan.pl/Content/119619 PY - 2021 IS - 3 EP - e137053 DO - 10.24425/bpasts.2021.137053 KW - ultrasonic hyperthermia KW - agar-based tissue mimicking phantom KW - magnetic nanoparticles KW - temperature KW - specific absorption rate (SAR) A1 - Gambin, Barbara A1 - Kruglenko, Eleonora VL - 69 DA - 12.04.2021 T1 - Ultrasonic specific absorption rate in nanoparticle-mediated moderate hyperthermia SP - e137053 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/119619 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -