normalized echo intensity

例句：

1. 1.The new system is designed to normalize the echo intensity in different environments.
   新系统旨在在不同环境下标准化回声强度。
2. 2.The researchers found that the normalized echo intensity could be used as a diagnostic tool for lung cancer.
   研究人员发现，标准化回声强度可以作为诊断肺癌的工具。
3. 3. In this study, we normalize the echo intensity of the human heart by comparing it with the echo intensity of the chest wall.
   在本研究中，我们通过将人类心脏的回声强度与胸壁的回声强度进行比较来标准化人心脏的回声强度。