Zdero R, Fenton P V, Bryant J T
Human Mobility Research Centre, Apps Medical Research Centre, Kingston General Hospital, Kingston, Ont., Canada K7L-2V7.
Ultrasonics. 2002 Oct;39(10):695-702. doi: 10.1016/s0041-624x(02)00383-9.
Acoustic test objects are commonly used for quality assurance testing of diagnostic ultrasound machines. However, the accompanying calibration protocols rely heavily on the judgment of the sonographer, are dependent on machine settings and are semi-quantitative. In the current study, two unique test objects and protocols were designed to quantitatively determine diagnostic ultrasound parameters, namely axial resolution and geometric uniformity, and lateral resolution and geometric uniformity of the ultrasound field. The effect of focal zone, signal gain, and distance from the ultrasound probe on these parameters was assessed. The investigation was performed using a typical low-frequency diagnostic unit equipped with a 7.5 MHz linear pulse-echo probe. Results underline the need to ensure that sensitivity of routine testing regimes is adequate for the measurements to be made. This study is a preliminary part of a larger project developing an ultrasound technique to be used as an engineering design tool in a non-clinical industrial setting for quality assurance testing of total knee replacements immersed in water.
声学测试对象通常用于诊断超声设备的质量保证测试。然而，随附的校准协议严重依赖超声检查医师的判断，取决于机器设置且为半定量的。在本研究中，设计了两种独特的测试对象和协议，以定量确定诊断超声参数，即轴向分辨率和几何均匀性，以及超声场的横向分辨率和几何均匀性。评估了聚焦区、信号增益以及与超声探头的距离对这些参数的影响。使用配备7.5 MHz线性脉冲回波探头的典型低频诊断单元进行了该项研究。结果强调了确保常规测试方案的灵敏度足以进行相关测量的必要性。本研究是一个更大项目的初步部分，该项目正在开发一种超声技术，用作非临床工业环境中的工程设计工具，用于对浸没在水中的全膝关节置换物进行质量保证测试。
