IEC/TS 62558:2011（E）规定了体模的基本特征和测量医用超声系统和相关换能器的空隙可检测率的方法。它仅限于测试结果的长期再现性方面。医疗诊断超声系统和相关换能器需要定期测试，因为基于超声图像的医疗决策的质量可能由于基本系统特性的逐渐退化而随着时间的推移而降低。TMM（组织模拟材料）体模旨在用于测量和记录多年使用期间定期测试中空隙可检测率的变化。本技术规范规定: -使用消声空隙的TMM 3D人工囊肿体模的重要特征和要求 -一个3D人工囊肿体模的设计实例，必要的测试设备和相关计算机软件算法的使用。 本技术规范目前适用于线阵换能器。建议在空隙可检测率（VDR）测量之前进行均匀性测试。

IEC/TS 62558:2011(E) specifies essential characteristics of a phantom and method for the measurement of void-detectability ratio for medical ultrasound systems and related transducers. It is restricted to the aspect of long-term reproducibility of testing results. Medical diagnostic ultrasound systems and related transducers need periodic testing as the quality of medical decisions based on ultrasonic images may decrease over time due to progressive degradation of essential systems characteristics. The TMM (Tissue Mimicking Material) phantom is intended to be used to measure and to enable documentation of changes in void-detectability ratio in periodic tests over years of use. This technical specification establishes:
- Important characteristics and requirements for a TMM 3D artificial cyst phantom using anechoic voids
- A design example of a 3D artificial cyst phantom, the necessary test equipment and use of relevant computer software algorithms.
This technical specification is currently applicable for linear array transducers. A uniformity test prior to void-detectability ratio (VDR) measurement is recommended.