MRI Terms

What is the unit of gyromagnetic ratio for hydrogen?

• Hz

• MHz

• MHz/T

• Tesla

What does the precessional path describe?

• Movement of electrons in atoms

• Spiral path taken by RF pulses

• Circular motion of magnetic moments around B₀

• Translation of the patient table

Which principle is MOST responsible for detecting the MRI signal from the body?

• Photoelectric effect

• Faraday’s Law of Induction

• Maxwell’s fourth equation

• Doppler shift

In MRI, "spin-up" refers to nuclei that are:

• In high energy state

• Aligned antiparallel to B₀

• Aligned parallel to B₀

• Spinning faster than Larmor frequency

What is the full form of FID in MRI?

• Free Induction Decay

• Functional Imaging Detail

• Frequency Induction Decay

• Field Imaging Decay

What is the value of the gyromagnetic ratio for hydrogen?

• 42.58 MHz/T

• 63.87 MHz/T

• 84.2 MHz/T

• 21.29 MHz/T

The MR signal is detected in which MRI component?

• Receiver coil

• Transmitter coil

• Magnet bore

• Gradient coil