Ultrasound Scanning | 超声扫描

📚 Ultrasound Scanning | 超声扫描

Ultrasound scanning is an imaging technique that uses high-frequency sound waves above the human hearing range to produce real-time pictures of internal body structures. In CIE A Level Physics, this topic links wave properties such as reflection, refraction, attenuation, impedance and the Doppler effect to a practical medical application. Understanding how ultrasound is generated, transmitted and detected helps explain both the physics principles and the design choices made in clinical scanners.

超声扫描是一种利用高于人耳听觉范围的高频声波实时显示人体内部结构图像的成像技术。在 CIE A Level 物理中，该主题将反射、折射、衰减、阻抗和多普勒效应等波动性质与实际医学应用联系起来。理解超声波的产生、传播和检测方式，有助于解释其物理原理以及临床扫描仪中的设计选择。

1. What is Ultrasound? | 什么是超声波？

Sound waves with frequencies above about 20 kHz are called ultrasound. Medical ultrasound imaging typically uses frequencies between 1 MHz and 15 MHz because this range provides a useful compromise between resolution and penetration depth in soft tissue.

频率高于约 20 kHz 的

Published by TutorHao | A-Level Physics Revision Series | aleveler.com

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