نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه اپتیک و لیزر، دانشکده فیزیک، دانشگاه سمنان، سمنان، ایران
2 گروه فیزیک ماده چگال، دانشکده فیزیک، دانشگاه الزهرا (س)، تهران، ایران
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Brain cancer is one of the most important cancers with needing to find non-invasive local methods for its treatment. Increasing the local temperature of the tumor area by the interaction of laser light and nanoparticles can be considered as a suitable solution for cancer treatment. In the paper, the effect of 793 nm continuous diode laser irradiation with a power of 1W and gaussian laser-beam profiles on the treatment of brain tumor with a diameter and thickness of 10 and 3 mm respectively is numerically investigated by the finite element method (FEM). The brain tumor is accumulated with gold nanorods. The results indicate that the exposure laser time has a significant effect on the temperature, the fraction of necrotic tissue in different positions of the tumor and healthy tissue, and therefore on the success of the treatment, which is due to the effect of the laser radiation time on the received heat dose by the cancer cells in different areas. The results show that the temperature and fraction of necrotic tissue are different in different positions due to the light absorption in the direction of propagation and also the distribution (Gaussian) of the laser beam profile. Also, selective treatment of brain cancer is possible with photothermal laser treatment using a diode laser and gold nanorods.
کلیدواژهها [English]