Annular Array Transducer and Matched Amplifier for Therapeutic Ultrasound

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The use of therapeutic ultrasound continues to grow. A focused ultrasonic wave can increase the tissue temperature locally for the non-invasive cancer treatment or other medical applications. The authors have designed a seven-element annular array transducer operating at 2.4 MHz. Each element was excited by sine burst supplied by a linear amplifier and FPGA control circuits. The acoustic field, generated by a transducer was initially numerically simulated in a computer and next compared to water tank hydrophone measurements performed at 20, 40 and 60 mm focal depth. The results showed good agreement of the measurements with theory and the possibility to focus the ultrasound in the preselected area. The total acoustic power radiated by the annular array was equal to 2.4 W.

Arditi M., Taylor W. et al. (1982), An annular array system for high resolution breast echography, Ultrasonic Imaging, 4, 1, 1-31.

Gambin B., Kujawska T. et al. (2009), Temperature Fields Induced by Low Power Focused Ultrasound in Soft Tissues During Gene Therapy. Numerical Predictions and Experimental Results, Archives of Acoustics, 34, 4, 445-459.

ter Haar G. (1999), Therapeutic ultrasound, Eur. J. Ultrasound, 9, 1, 3-9.

ter Haar G. (2008), The Resurgence of Therapeutic ultrasound - A 21st Century Phenomenon, Ultrasonics, 48, 4, 233.

Shuto J., Ichimiya I., Suzuki M. (2006), Effects of low-intensity focused ultrasound on the mouse submandibular gland, Ultrasound Med. Biol., 32, 4, 587-594.

Wójcik L., Kujawska T., Nowicki A. (2008), Pulsed nonlinear acoustic fields from clinically relevant sources: numerical calculations and experiments results, Archives of Acoustics, 33, 4, 565-571.

Wójcik J., Filipczyński L., Kujawska T. (1999), Temperature elevation computed for three-layer and four-layer obstetrical tissue models in nonlinear and linear propagation cases, Ultrasound Med. Biol., 25, 5, 259-267.

Archives of Acoustics

The Journal of Institute of Fundamental Technological of Polish Academy of Sciences

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IMPACT FACTOR 2016: 0.816
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CiteScore 2016: 1.15

SCImago Journal Rank (SJR) 2016: 0.432
Source Normalized Impact per Paper (SNIP) 2016: 0.948


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