Details

Autor(en) / Beteiligte

• Maruvada, Subha
• Harris, Gerald R.
• Herman, Bruce A.
• King, Randy L.

Titel

Acoustic power calibration of high-intensity focused ultrasound transducers using a radiation force technique

Ist Teil von

• The Journal of the Acoustical Society of America, 2007-03, Vol.121 (3), p.1434-1439

Ort / Verlag

Woodbury, NY: Acoustical Society of America

Erscheinungsjahr

2007

Quelle

American Institute of Physics (AIP) Journals

Beschreibungen/Notizen

• To address the challenges associated with measuring the ultrasonic power from high-intensity focused ultrasound transducers via radiation force, a technique based on pulsed measurements was developed and analyzed. Two focused ultrasound transducers were characterized in terms of an effective duty factor, which was then used to calculate the power during the pulse at high applied power levels. Two absorbing target designs were used, and both gave comparable results and displayed no damage and minimal temperature rise if placed near the transducer and away from the focus. The method yielded reproducible results up to the maximum pulse power generated of approximately 230 W , thus allowing the radiated power to be calibrated in terms of the peak-to-peak voltage applied to the transducer.