Strong magnetic fields and non-ionising radiations are used in

Options

A. Radiography
B. CT
C. MRI
D. EEG

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the application of strong magnetic fields and non-ionizing radiations. We need to identify which medical imaging technique utilizes these elements.

2. **Identifying the Techniques**: The main techniques to consider are:
- MRI (Magnetic Resonance Imaging)
- Radiography
- CT Scan (Computed Tomography)
- EEG (Electroencephalography)

3. **Analyzing MRI**:
- MRI stands for Magnetic Resonance Imaging.
- It uses strong magnetic fields and non-ionizing radiation to create images of the internal organs.
- Thus, MRI is a strong candidate for our answer.

4. **Analyzing Radiography**:
- Radiography is used to obtain images of internal organs.
- It primarily uses X-rays, which are a form of ionizing radiation.
- Therefore, radiography does not fit the criteria of using non-ionizing radiation.

5. **Analyzing CT Scan**:
- A CT scan is another imaging technique that studies internal organs.
- It also uses X-rays or gamma rays, which are ionizing radiations.
- Thus, CT scan is not the correct option either.

6. **Analyzing EEG**:
- EEG is used specifically to study brain activity.
- It involves placing electrodes on the scalp to measure electrical activity in the brain.
- EEG does not use strong magnetic fields or ionizing radiation, making it an incorrect choice.

7. **Conclusion**: Based on the analysis, the only technique that uses strong magnetic fields and non-ionizing radiation is MRI. Therefore, the correct answer is MRI.

**Final Answer**: MRI (Magnetic Resonance Imaging)

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