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Introduction to MRI

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Questions and Answers

What is another name for magnetic resonance imaging (MRI)?

Nuclear magnetic resonance imaging (NMRI) (correct)

X-ray tomography

Medical radio frequency imaging

Tomographic magnetic resonance

Which type of energy source is used in MRI?

X-rays

Gamma rays

Ionizing radiation

Radio waves (correct)

What type of radiation is NOT used in MRI?

Ultraviolet radiation

Gamma rays

Radio waves (correct)

X-rays

What property of atomic nuclei does MRI rely on?

Magnetic properties Signup and view all the answers

In MRI, what can interact with low energy radio waves to change nuclear spins?

^{1}H and ^{13}C Signup and view all the answers

What type of wavelength do radio waves in MRI typically have?

More than 10^7 nm Signup and view all the answers

What is the main factor that makes hydrogen the most stimulating element for magnetic resonance imaging (MRI)?

The number of protons in its atomic nucleus Signup and view all the answers

In the context of magnetic resonance, what contributes to the gradient of gray colors seen in MRI images?

The varying strength of the magnetic field Signup and view all the answers

How do positively charged protons exhibit magnetic properties inside the human body?

By responding to external magnetic fields Signup and view all the answers

What happens to the direction of proton's magnetic field when placed inside an external magnetic field (B0)?

It aligns with or against B0 Signup and view all the answers

Why are humans not considered magnets despite having scattered protons with magnetic properties?

The magnetic moment of protons is very weak Signup and view all the answers

Why are positively charged protons likened to magnets in the human body?

Because they form a magnetic field when spinning Signup and view all the answers