Magnetic resonance imaging

High school (ages 12+)
Human Body

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/magnetic-resonance-imaging

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the underlying physics?Nuclear Magnetic Resonance (NMR) phenomenon, exploiting the magnetic properties of atomic nuclei
2. What is the key imaging advantage?High soft tissue contrast and resolution without ionizing radiation
3. What is magnetic resonance imaging (MRI)?MRI is a safe, non‑invasive way to take pictures of the inside of your body using magnets and radio waves.
4. How does an MRI machine look inside the body without cutting it?It uses a strong magnetic field to line up tiny magnets inside water molecules, then sends radio waves to shake them. When the waves stop, the molecules send back signals that the machine turns into detailed pictures.

Larmor Frequency: The characteristic frequency at which atomic nuclei precess in a magnetic field.
T1 and T2 Relaxation Times: Measures of how quickly excited protons return to their equilibrium state after an RF pulse.
Fourier Transform: A mathematical process used by MRI computers to convert raw signal data into images.