Archives of Acoustics, 28, 2, pp. , 2003

Phased array optimizing characteristics in HIFU device

Qi Chen
Department of Biomedical Engineering Shanghai Jiao Tong University Shanghai

Bin Xiong
Department of Biomedical Engineering Shanghai Jiao Tong University Shanghai

Yazu Chen
Department of Biomedical Engineering Shanghai Jiao Tong University Shanghai

For the high intensity focused ultrasound (HIFU) phased
array frequency distribution pattern size and amount of the elements may affect
the performance and cost of the HIFU device. In this paper an inner holed
spherical shell with 96 transducer elements was designed basing on the Ebbini
pseudo-inverse matrix and Penns bioheat equation. The phased array has a lower
grating-lobe level and a higher intensity gain suitable for deep heating. The
experiments with the array usung 16 elements show that the phased array design
produces a large dynamic scan scale with least elements and a high heat focus.
Keywords: focused ultrasound; phased array; bioheat transfer; optimization.
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