Measurement of radical production as a result of cavitation in medical ultrasound fields.
This paper describes the use of the terephthalate dosimeter to measure the threshold and extent of cavitation arising from medical ultrasound sources at high frequencies. Significant hydroxyl radical production was noted from a physiotherapy source and low level activity was also detected when using a pulsed, diagnostic type transducer system. The effect of sound intensity and the type of field is described. The possibility of using polymer degradation to monitor the cavitation is also discussed.
School of Chemistry, University of Bath, Claverton Down, UK. chsgjp@bath.ac.uk
G J
GJ
Price
F A
FA
Duck
M
M
Digby
W
W
Holland
T
T
Berryman
D002138:Calibration; D016166:Free Radical Scavengers; D017665:Hydroxyl Radical; D010795:Phthalic Acids; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods*; D012680:Sensitivity and Specificity; D014465:Ultrasonics; D014463:Ultrasonography
D016166:Free Radical Scavengers; D010795:Phthalic Acids; D017665:Hydroxyl Radical; C011363:terephthalic acid