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Acoustical evaluation of a prototype sector-vortex phased-array applicator

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2 Author(s)
S. Umemura ; Bioacoust. Res. Lab., Illinois Univ., Urbana, IL, USA ; C. A. Cain

A prototype sector-vortex phased-array applicator for ultrasound hyperthermia was constructed and acoustically evaluated. The array transducer consists of special lead-titanate ceramic elements of 16 sectors and two tracks attached on a element is driven by a complementary pair of power MOSFETs at 750 kHz. An annular focal field approximated by the Mth order Bessel function is theoretically predicted to be formed when the array elements are driven with a phase distribution that rotates M (>

Published in:

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control  (Volume:39 ,  Issue: 1 )