Description
Name:
Date:
1. Which statement below referring to the ?body coil? is false?
A. The body coil is located closest to the patient in the warm bore
B. The main purpose of the body coil is to transmit RF pulses to the body, but it can receive
electrical pulses in the form of RF signals from the patient
C. The body coil is a gradient coil that linearly changes the magnetic field
D. The body coil is located in the warm-bore
2. Which component provides the electrical power to the gradient coils?
A. the RF power amplifier
B. the host computer
C. the pulse sequence controller
D. none of these
3. Which of the following is the definition of shimming?
a. creating a linear change in the magnetic field
b. adjusting the homogeneity of the magnetic field
c. rapidly shutting off the magnetic field
d. none of these
4. Which of the following is true regarding the RF shielding?
a. it prevents RF energy generated by the MR system from leaking
external radio signals
b. it restricts external radio signals from being detected by the system RF
receiver coils
c. it is located in the warm bore of the cryostat
d. all the above are true
5. Which of the following components is located within the equipment cabinet?
a. the gradient coils
b. the RF coils
c. the magnetic shielding
d. the X, Y & Z gradient amplifiers
6. A measure of the uniformity of the magnetic field of the system? is a definition of which of the
following?
a. precession
b. homogeneity
c. quadrature
d. cryogen
7. Which of the following are true about slew rate:
a. it is the ratio of peak gradient strength/rise time of the gradient
b. is measured in T/m/s
c. the slew rate influences certain scanning parameters such as TR and TE
d. All of the above are true
8. Gradient field coils do all of the following except:
a. create a homogeneous magnetic field
b. make spatial localization of a volume or slice of information possible
c. are in the x, y, and z planes
d. may utilize more than one gradient coil when running a sequence
9. The loud noise heard during MRI scanning occurs when power is distributed through the:
a. the RF pulses
b. the receiver coils
c. the X, Y, Z gradient coils
d. the cryostat
10. The purpose of the RF transmit system is to do all of the following except:
a. receive signals transmitted from the patient?s body
b. delivers RF pulses to a region of the patient?s body
c. makes resonance possible when the RF frequency and precessional frequcny of the hydrogen
match
d. to move the NMV whose precessional frequencies match the frequency of the RF pulse
perpendicular to B(o)
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