MRI Exercises

What is the main function of the RF coils in an MRI scanner?

• To transmit radio frequency waves into the patient's body

• To receive signals from the patient

• To create the magnetic field

• To control the scanner operation

What is the purpose of the slice selection gradient in MRI?

• Localizes the point in a slice

• Creates the transverse magnetization

• Receives the MR signal

• Determines the slice position

What is the time interval between the start of the RF pulse and the start of the next excitation known as?

• Transverse relaxation time (T2)

• Time to echo (TE)

• Time to repeat (TR)

• Longitudinal relaxation time (T1)

What is the main application of Functional Magnetic Resonance Imaging (fMRI)?

• To observe brain structures

• To diagnose aneurysms

• To differentiate between white matter and grey matter

• To assess neurological status

Why is it important for patients to complete a questionnaire before having an MRI?

• To determine the strength of the magnetic field

• To assess the patient's medical history

• To select the appropriate scanning parameters

• To calibrate the RF coils

What happens to the longitudinal magnetization (LM) when the RF pulse is switched off?

• It decreases

• It remains the same

• It increases

• It disappears

What is the purpose of K-space in MRI image formation?

• To generate the magnetic field

• To transmit radio frequency waves

• To store raw data for image reconstruction

• To localize the signal origin

Which component of an MRI scanner is responsible for creating a variable magnetic field?

• RF coils

• Gradient coils

• Antenna

• Computer system

What is the effect of reducing the receiver bandwidth in MRI?

• Reduces susceptibility artifact

• Improves signal-to-noise ratio

• Increases chemical shift artifact

• Shortens T2 relaxation time

The Z axis is aligned with the ____

• Patient’s left to right

• Long axis of the patient’s body

• Patient’s anterior to posterior