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A Thorough Collection of 200 MRI Physics and Biological Principles Practice Examination Questions with Detailed Rationales, Encompassing Fundamental Concepts, Imaging Sequences, K-Space Reconstruction, Common Artifacts, Contrast Media, Safety Co

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A Thorough Collection of 200 MRI Physics and Biological Principles Practice Examination Questions with Detailed Rationales, Encompassing Fundamental Concepts, Imaging Sequences, K-Space Reconstruction, Common Artifacts, Contrast Media, Safety Considerations, and Advanced Techniques, as per Bushong’s 4th Edition Test Bank Content

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A Thorough Collection of 200 MRI Physics and
Biological Principles Practice Examination
Questions with Detailed Rationales, Encompassing
Fundamental Concepts, Imaging Sequences,
K-Space Reconstruction, Common Artifacts,
Contrast Media, Safety Considerations, and
Advanced Techniques, as per Bushong’s 4th Edition
Test Bank Content.


MRI物理与原理模拟练习题(100题,含答案与解

析)

第1-10题:基础电磁学与MRI原理

1. 在MRI系统中,什么产生静态磁场(B₀)和梯

度磁场(Bxyz)?

• 答案: 除永磁体成像系统外,静态磁场和梯

度磁场均由导体中的电流产生。

, • 解析: 这是电磁学的基础原理——电流通过

导体时会产生磁场。

2. 为什么MRI机房需要进行屏蔽?

• 答案: 使用特殊设计的导体进行屏蔽,以减

少环境电磁辐射(特别是射频波段)的干扰

强度。

• 解析: 外部电磁辐射会干扰MRI的射频信号

接收,影响图像质量。

3. 谁被称为“静电学之父”?

• 答案: 本杰明·富兰克林(Benjamin Franklin
)。

• 解析: 富兰克林在18世纪中叶首次进行了静

电实验,静电学是描述静止电荷行为的科学


,4. X射线与MRI中使用的射频(RF)有哪些相似

之处和区别?

• 答案: 两者速度相同(c = 3×10⁸ m/s),都
由相互垂直振荡的电场和磁场组成。区别在

于射频频率更低、波长更长、能量比X射线小



• 解析: 两者都是电磁辐射,但处于频谱的不

同波段。

5. MRI的物理基础是电磁感应,“感应”(

induction)在此语境中是什么意思?

• 答案: 感应是指能量从一个状态或参考系转

移到另一个状态而不发生接触。传导(

conduction)则需要物理介质。

, • 解析: 电磁感应是MRI信号产生的核心机制

6. 描述量子力学的基本方程是什么?
• 答案: E = hf,其中E是能量,h是普朗克常数
,f是频率。

• 解析: 该方程表明电磁辐射的频率越高,能

量越高。

7. 电场强度(E)的单位是什么,各代表什么含

义?

• 答案: E = F/Q,F以牛顿(N)为单位,Q以

库仑(C)为单位。牛顿是力的单位(kg·m/s²

),库仑是静电电荷量(1 C = 6.24×10¹⁸个电

子)。

• 解析: 电场强度是单位电荷所受的力。

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