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See Chinese contents: YY/T 1142-2013 YY/T 1142-2013: Methods of measuring the frequency of medical ultrasonic equipment and probe
This standard specifies the testing methods for the frequency characteristics of medical ultrasonic equipment (hereinafter referred to as equipment) and probes with a frequency range of 0.5 MHz~15 MHz, and the calculation method of relevant parameters. This standard applies to all types of medical ultrasonic equipment and probes operating in continuous wave, quasi-continuous wave, or pulse wave states.
