State primary standard of power, intensity, and pressure of ultrasound in water GET 169-2025

The proliferation of ultrasound medical devices and the development of ultrasound diagnostic and therapeutic methods have necessitated metrological control of a wide range of ultrasound medical equipment acoustic output parameters, such as ultrasound pressure and intensity. To ensure the uniformity of high-frequency (0.5–20 MHz) hydroacoustic measurements, as well as to implement metrological traceability of intensity and pressure measurement results obtained using ultrasonic field parameter meters and high-frequency hydrophones, respectively, the State primary standard of the unit of ultrasound power in water, GET 169-2019, has been improved. As a result of these improvements, the State primary standard of the units of ultrasound power, intensity, and pressure in water, GET 169-2025, has been approved. This standard includes two new units: the URTU-1 unit for reproducing and transmitting the unit of ultrasound intensity in water and the URTU-2 unit for reproducing and transmitting the unit of ultrasound pressure in water. The expansion of the list of units reproducible using GET 169-2025 enables metrological traceability of the results of ultrasound power, intensity, and pressure measurements in water, and therefore of devices designed to measure and control the acoustic output parameters of medical ultrasound and other equipment. Amendments have been made to the state verification scheme for ultrasound power measuring instruments in the frequency range from 0.5 to 20 MHz, reflecting the new capabilities of GET 169-2025 and addressing the challenges of distributing working standards to metrology centers across the Russian Federation.