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1. Introduction
Since the late 19th and early 20th centuries, people solved the way to produce ultrasonic by electronic technology, unveiling a new historical chapter of rapid development and promotion of ultrasound. In 1932, the first ultrasonic treatment appeared in German. In 1939, literatures of the clinical effect of ultrasonic treatment 定制term paper published. In the late of 1940s, ultrasonic therapy emerged in Europe, in 1949 in the first international conference of medical ultrasound, laid the foundation of the ultrasonic therapy development. In 1956, the 2nd international conference of medical ultrasound had many papers published, ultrasonic treatment entered into practical mature stage.
2. The historical development of the medical imaging technology of ultrasounds
3. “Truth” aspect of ultrasonic image
3.1 Function as a regular diagnostic tool
3.2 The medical meaning of ultrasonic image
4. ‘Evidence’ aspect of ultrasonic image
4.1 Function as a psychological event and a photographic ritual
4.2 The cultural meaning of ultrasonic image
5. Conclusion: Distinguish the boundaries between ‘truth’ and ‘evidence’

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