Precision Acoustics Radiation force balance

Precision Acoustics Radiation force balance

PA辐射力平衡

Radiation force balance for diagnostic and therapeutic medical ultrasound

诊断和治疗性医疗超声的辐射力平衡

Overview 概述

Radiation force balance for diagnostic and therapeutic medical ultrasound ultrasonic. Power is a primary acoustic quantity and its measurement is required by international standards for both diagnostic and therapeutic ultrasound systems. The ability to measure ultrasonic power accurately is vital to ensuring the correct operation and safe use of ultrasound in medicine.

诊断和治疗医疗超声波的辐射力平衡。功率是主要的声学量，其测量是国际诊断和治疗超声系统标准的要求。准确测量超声功率对于确保超声波在医学中的正确操作和安全使用至关重要。

A Radiation Force Balance (RFB) provides a means to directly measure the power produced by a source of ultrasound. It accomplishes this by means of a highly accurate micro-balance that is used to determine the acoustic radiation force that occurs when ultrasound is incident upon a highly absorbing target. The RFB from Precision Acoustics Ltd can be used to measure ultrasonic power from 10 mW to 100 W over a wide range of frequencies.

辐射力平衡仪(RFB)提供了一种直接测量超声源产生的功率的方法。它通过高精度微量天平实现这一目标，用于确定当超声波照射到高度吸收目标时产生的声波辐射力。Precision Acoustics Ltd 的 RFB 可用于测量 10 毫瓦至 100 瓦的超声波功率，覆盖广泛的频率范围。

The RFB from Precision Acoustics Ltd can be used to measure ultrasonic power from 10 mW to 100 W over a wide range of frequencies.

Precision Acoustics Ltd 的 RFB 可用于测量 10 毫瓦至 100 瓦的超声波功率，覆盖广泛的频率范围。

Degassed water is recommended for all RFB measurements to minimise artefacts arising from bubble formation in the presence of high power fields. This is particularly important for the measurement of HIFU/HITU fields. The RFB tank for the low-frequency variant can be supplied with in-out hose connections on request. Precision Acoustics Ltd can also supply water treatment systems if required.

所有 RFB 测量建议使用脱气水，以减少高功率场下气泡形成产生的伪影。这对于 HIFU/HITU 场的测量尤为重要。低频变体的 RFB 罐可按需提供进出软管连接。如有需要，Precision Acoustics Ltd 也可以提供水处理系统。

Key features 主要特征

Two suspended target configurations:

两种悬挂目标配置：

High frequency target 高频靶

Low frequency target 低频靶

Integrated draft enclosure to minimise environmental artefacts

集成的草稿围栏以减少环境干扰

Customisable configuration (on request) to accommodate unusual transducer geometries

可根据要求定制配置以适应特殊换能器几何形状

Automatic calculation of ultrasonic power and measurement uncertainty via bespoke software

通过定制软件自动计算超声功率和测量不确定性

Automatic calculation of focussing and absorption correction factors as specified in IEC 61161 within software

在软件中自动计算 IEC 61161 规定的聚焦和吸收校正因子

Typical type A (random) measurement uncertainties of 1% at powers >100 mW

典型的 A 型(随机)测量不确定性为 1%，功率>100 mW。

Full range RFB specifications

全范围 RFB 规格

Precision Acoustics RFB’s (High and low frequencies) are highly specified models suitable for the majority of medical diagnostic and physiotherapy ultrasound equipment: Using the suspended target the power generated by HIFU transducers can be measured.

精密声学的 RFB(高频和低频)是高度规范的型号，适用于大多数医疗诊断和物理治疗超声设备：利用悬挂靶可以测量 HIFU 换能器产生的功率。

High frequency target 高频靶

Calibration at 1 MHz and 3 MHz, powers: 1 W, 5 W and 10 W.

校准频率分别为 1 MHz 和 3 MHz，功率分别为 1 W、5 W 和 10 W。

Calibration at 1 MHz and 3 MHz, powers: 1 W, 5 W and 10 W AND 3 outputs in the range 10 mW to 1 W at 0.928 MHz and 3.151 MHz AND 2 outputs in the range 10 mW to 200 mW at 5.287 MHz and 7.415 MHz and 9.541 MHz.

校准频率为 1 MHz 和 3 MHz，功率为 1 W、5 W 和 10 W，输出功率范围为 10 mW 至 1 W，频率为 0.928 MHz 和 3.151 MHz;输出功率范围为 10 mW 至 200 mW，频率为 5.287 MHz 和 7.415 MHz 和 9.541 MHz。Low frequency target 低频靶

Calibration 200 kHz to 1 MHz in 100 kHz steps at 1 W power

在 1 瓦功率下，以 100 kHz 为步进，校准 200 kHz 到 1 MHz