抄録
High Intensity Focused Ultrasound (HIFU) was developed as a promising non-invasive treatment for cancers. However, in this treatment, the focal point is small to treat cancer. To overcome this problem, in this study, we proposed a new type of transducer to expand the heating area. First, we presented a new double focused transducer model for calculating pressure distributions. Second, calculated pressure distributions using a Finite-Difference Time-Domain (FDTD) method were presented. Third, a comparison of pressure distributions with the single focused transducer was discussed. From these results, it was found that the focal area was expanded using the double focused transducer.
