使用热测试物体测量选定脉冲多普勒和物理治疗超声束所产生的热量。
Heating caused by selected pulsed Doppler and physiotherapy ultrasound beams measured using thermal test objects.
作者信息
Atkins T J, Duck F A
机构信息
Medical Physics Department, Royal United Hospital, Combe Park, Bath BA1 3NG, UK.
出版信息
Eur J Ultrasound. 2003 Feb;16(3):243-52. doi: 10.1016/s0929-8266(02)00079-4.
OBJECTIVE
To assess the heating caused by selected pulsed Doppler and physiotherapy ultrasound beams by measurements made using thermal test objects.
METHOD
Thermal test objects were used to measure temperature rises in selected ultrasound fields. These were compared with theoretical predictions based on standard exposure measurements. A separate thermocouple was used to measure heating at the transducer surface.
RESULTS
Temperature rises of up to 6 degrees C were measured for Doppler fields using a thermal test object. The attenuation-corrected temperature rises that were measured generally agreed with calculated Thermal Indices. Temperature rises of up to 2 degrees C were observed for physiotherapy ultrasound fields in pulsed operation.
CONCLUSION
Significant overlap between the measured temperature rises of selected pulsed Doppler and physiotherapy ultrasound fields was observed.
目的
通过使用热测试物体进行测量，评估选定的脉冲多普勒和理疗超声束所产生的加热效应。
方法
使用热测试物体测量选定超声场中的温度升高。将这些测量结果与基于标准暴露测量的理论预测进行比较。使用单独的热电偶测量换能器表面的加热情况。
结果
使用热测试物体测量到多普勒场的温度升高高达6摄氏度。经衰减校正后的测量温度升高总体上与计算出的热指数相符。在脉冲操作的理疗超声场中观察到温度升高高达2摄氏度。
结论
观察到选定的脉冲多普勒和理疗超声场的测量温度升高之间存在显著重叠。
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