Name the noble gas used in Magnetic Resonance Imaging (MRI) Systems.

Explanation

**Step-by-Step Solution:**

1. **Identify the Noble Gases**: The noble gases are a group of elements in Group 18 of the periodic table. They include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).

2. **Understand the Context of MRI**: Magnetic Resonance Imaging (MRI) is a medical imaging technique used to visualize internal structures of the body. It relies on the principles of nuclear magnetic resonance.

3. **Determine the Noble Gas Used in MRI**: Among the noble gases, Helium is commonly used in MRI systems. It is utilized primarily for its cooling properties, as MRI machines require cooling to maintain superconductivity in their magnets.

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