Hekkenberg Rob T, Richards Adrian, Beissner Klaus, Zeqiri Bajram, Bezemer Robert A, Hodnett Mark, Prout Glen, Cantrall Chris
Netherlands Organisation for Applied Scientific Research (TNO) Quality of Life, Leiden, The Netherlands.
Ultrasound Med Biol. 2006 Sep;32(9):1423-9. doi: 10.1016/j.ultrasmedbio.2006.04.001.
Ultrasound (US) physiotherapy as a clinical treatment is extremely common in the Western world. Internationally, regulation to ensure safe application of US physiotherapy by regular calibration ranges from nil to mandatory. The need for a portable power standard (PPS) has been addressed within a European Community (EC)-funded project. This PPS consists of an electrical driver, a set of US transducers and a cavitation detector (CD). Each component has been extensively tested for stability and travel robustness. Transducer output power has been determined with an uncertainty of <3.3% and with a long-term (2-y) output stability of better than 3%. The CD can detect bubble activity for powers above 3 W for a 1-MHz transducer. Travel trials demonstrated the utility of the PPS in practical measurement environments. Deviations in power measurements observed during these trials were mostly acceptable (<10%), although there were also examples of gross differences (>100%). The PPS is now ready to be used to underpin traceable calibration of physiotherapy devices.
超声（US）物理治疗作为一种临床治疗方法在西方世界极为常见。在国际上，通过定期校准来确保超声物理治疗安全应用的规定从无到强制不等。在一个由欧洲共同体（EC）资助的项目中已经解决了对便携式功率标准（PPS）的需求。这个PPS由一个电驱动器、一组超声换能器和一个空化探测器（CD）组成。每个组件都经过了广泛的稳定性和抗运输颠簸性测试。换能器输出功率的测定不确定度小于3.3%，长期（2年）输出稳定性优于3%。对于1兆赫的换能器，CD能够检测功率高于3瓦时的气泡活动。运输试验证明了PPS在实际测量环境中的实用性。在这些试验中观察到的功率测量偏差大多是可以接受的（<10%），不过也有差异巨大（>100%）的例子。现在PPS已准备好用于支持理疗设备的可溯源校准。
