What is MRI?

Correct option is C

Correct Answer:C. Magnetic Resonance Imaging

• MRI stands for Magnetic Resonance Imaging.

• It is a non-invasive medical imaging technique used to produce detailed images of organs, soft tissues, bones, and other internal body structures.

• MRI uses strong magnetic fields and radio waves to generate images — no harmful radiation like X-rays.

• Especially useful for brain, spinal cord, joints, muscles, and internal organs.

• Invented in the 1970s; Nobel Prize in Physiology or Medicine (2003) awarded to Paul Lauterbur and Sir Peter Mansfield for their work on MRI.

• MRI machines are large tube-shaped magnets. Patients lie inside the tube during scanning.

• Types of MRI:

  • fMRI (Functional MRI) – measures brain activity by detecting changes in blood flow.

  • MRA (Magnetic Resonance Angiography) – focuses on blood vessels.

• Common advantages:

  • High contrast images of soft tissues.

  • Helpful in detecting tumors, strokes, ligament tears, etc.

• Precautions:

  • Not suitable for people with metal implants or pacemakers.

  • Procedure is safe but can be noisy and claustrophobic.