Title :
Comparison of acoustic power calibration methods for therapeutic ultrasound transducers using PVDF membrane hydrophone, heterodyne laser vibrometery and radiation force measurements
Author :
Song, Junho ; Hynynen, Kullervo
Author_Institution :
Dept. of Med. Biophys., Univ. of Toronto, Toronto, ON, Canada
Abstract :
The acoustic pressure field and power radiated from a high intensity focused ultrasound (HIFU) transducer are of great importance for the safety of the patients in clinical applications. We compared three acoustic power calibration methods for the HIFU transducer. These include a PVDF membrane hydrophone, ¿brush¿ target radiation force balance, and heterodyne laser vibrometer. The acoustic pressure and power amplitude measurements had good agreement within a margin of 5% in the measurable acoustic power range. The advantages and limitations of each of the calibration methods were studied.
Keywords :
acoustic intensity measurement; biomedical ultrasonics; calibration; hydrophones; patient treatment; ultrasonic transducers; vibration measurement; HIFU transducer; PVDF membrane hydrophone; acoustic power amplitude measurement; acoustic power calibration method; acoustic pressure measurement; heterodyne laser vibrometery; high intensity focused ultrasound; radiation force measurement; therapeutic ultrasound transducers; Acoustic measurements; Acoustic transducers; Biomembranes; Calibration; Force measurement; Power lasers; Power measurement; Sonar equipment; Ultrasonic imaging; Ultrasonic transducers; HIFU; acsoutic power; heterodyne laser vibrometer; hydrophone; radiation force; therapeutic ultrasound;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441928
