The Magnetic resonance imaging (MRI) is based on the phenomenon of

Options

A. Nucleae magnetic resonance
B. Electron magnetic resonance
C. Electron Paranagnetic resonance
D. Diamagnetism of Human tissues

Explanation

To solve the question regarding the basis of Magnetic Resonance Imaging (MRI), we can break it down into a few key steps:

### Step-by-Step Solution:

1. **Understanding MRI**:
- MRI stands for Magnetic Resonance Imaging. It is a medical imaging technique used to visualize detailed internal structures of the body.
- It is important to note that MRI is a non-invasive technique, meaning it does not require any surgical procedures to obtain images.

2. **Principle of Operation**:
- MRI operates based on the principles of nuclear magnetic resonance (NMR).
- It utilizes a strong magnetic field to align the nuclear spins of atoms in the body, primarily focusing on protons found in water and fat.

3. **Resonance Phenomenon**:
- When placed in a magnetic field, the protons in the body resonate at a specific frequency when exposed to radiofrequency (RF) pulses.
- This resonance occurs at low radio frequencies, which is crucial for the imaging process.

4. **Magnetic Dipoles**:
- The nuclei of many atoms, including hydrogen (which is abundant in the human body), act as magnetic dipoles.
- When these dipoles are subjected to a magnetic field, they can absorb and emit electromagnetic energy, which is detected and used to create images.

5. **Conclusion**:
- Therefore, MRI is based on the phenomenon of nuclear magnetic resonance, which involves the interaction of magnetic fields with the nuclear spins of protons in the body.

### Final Answer:
The Magnetic Resonance Imaging (MRI) is based on the phenomenon of **Nuclear Magnetic Resonance (NMR)**.

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