超音波学.物理疗法系统.频率范围0.5 MHz至5 MHz的现场规范和测量方法

[中文适用范围]： 本国际标准适用于设计用于物理治疗的超声波设备，该设备包含超声波换能器，可在 0@5 MHz 至 5 MHz 频率范围内产生连续或准连续波超声波。该标准仅涉及每个治疗头采用单平面非聚焦圆形换能器@产生垂直于治疗头表面的静态波束的超声波物理治疗设备。本标准规定： ?基于参考测试方法的超声理疗设备输出的测量和表征方法； ？由超声理疗设备制造商根据参考测试方法指定的特性； ？超声波物理治疗设备产生的超声波场的安全指南； ？基于常规测试方法的超声理疗设备输出的测量和表征方法； ？基于常规测试方法的超声理疗设备输出方面的验收标准。超声理疗设备的治疗价值及使用方法不属于本标准范围。 [外文原描述]： IEC 61689:2013 is applicable to ultrasonic equipment designed for physiotherapy containing an ultrasonic transducer generating continuous or quasi-continuous wave ultrasound in the frequency range 0,5 MHz to 5 MHz. This standard only relates to ultrasonic physiotherapy equipment employing a single plane non-focusing circular transducer per treatment head, producing static beams perpendicular to the face of the treatment head. This standard specifies: - methods of measurement and characterization of the output of ultrasonic physiotherapy equipment based on reference testing methods; - characteristics to be specified by manufacturers of ultrasonic physiotherapy equipment based on reference testing methods; - guidelines for safety of the ultrasonic field generated by ultrasonic physiotherapy equipment; - methods of measurement and characterization of the output of ultrasonic physiotherapy equipment based on routine testing methods; - and acceptance criteria for aspects of the output of ultrasonic physiotherapy equipment based on routine testing methods. Therapeutic value and methods of use of ultrasonic physiotherapy equipment are not covered by the scope of this standard. This third edition cancels and replaces the second edition published in 2007. It constitutes a technical revision which includes the following significant technical changes with respect to the previous edition: - restriction introduced of 0,2 W/cm2 effective intensity during hydrophone measurements for treatment heads with ka≤20, to limit the likelihood of cavitation; - change in the factor Fac, to determine the effective radiating area, from 1,354 to 1,333; - and change to SI units for terms and definitions. This publication is to be read in conjunction with IEC 60601-2-5:2009 .