MRI Quiz - Hardware QA/QC
1.5 Tesla - correct answer ✔High field scanners typically have field strengths
greater than or equal to:
A. 0.3 Tesla
B. 0.7 Tesla
C. 1.5 Tesla
D. 5 Gauss
Make patients less vulnerable to the RF heating effects - correct answer
✔Consistent room temperature of 65-75°F, humidity of 50-70%, and sufficient
air flow in the MR scan room is recommended to:
A. Reduce the cryogen boil off rate
B. Minimize the risk of local surface coil burns
C. Make patients less vulnerable to the RF heating effects
D. Keep the shim and gradient coils from overheating
Radiofrequency coils - correct answer ✔In a cross sectional view of the MR
magnet design, which coils are closest to the patient?
A. Active shim coils
B. Passive shim coils
C. Gradient coils
D. Radiofrequency coils
, 4° Kelvin - correct answer ✔The liquid cryogens are cooled in a
superconducting magnet at a temperature of _________?
A. 1° Celsius
B. 1° Fahrenheit
C. 4° Kelvin
D. 4° Celsius
Gravitational earth magnetic fields - correct answer ✔Which of the following
is NOT a magnetic field associated with MR imaging?
A. Static magnetic fields
B. Oscillating magnetic fields (RF)
C. Time varying magnetic fields (gradient)
D. Gravitational earth magnetic fields
make the B0 field as homogenous as possible - correct answer ✔The
purpose of shimming the magnet is to:
A. make the B0 field as homogenous as possible
B. make the B1 field as homogenous as possible
C. make the scan time as short as possible
D. correct for gradient slopes
Reconstructing the images using the Fourier transform - correct answer
✔The array processor is responsible for:
1.5 Tesla - correct answer ✔High field scanners typically have field strengths
greater than or equal to:
A. 0.3 Tesla
B. 0.7 Tesla
C. 1.5 Tesla
D. 5 Gauss
Make patients less vulnerable to the RF heating effects - correct answer
✔Consistent room temperature of 65-75°F, humidity of 50-70%, and sufficient
air flow in the MR scan room is recommended to:
A. Reduce the cryogen boil off rate
B. Minimize the risk of local surface coil burns
C. Make patients less vulnerable to the RF heating effects
D. Keep the shim and gradient coils from overheating
Radiofrequency coils - correct answer ✔In a cross sectional view of the MR
magnet design, which coils are closest to the patient?
A. Active shim coils
B. Passive shim coils
C. Gradient coils
D. Radiofrequency coils
, 4° Kelvin - correct answer ✔The liquid cryogens are cooled in a
superconducting magnet at a temperature of _________?
A. 1° Celsius
B. 1° Fahrenheit
C. 4° Kelvin
D. 4° Celsius
Gravitational earth magnetic fields - correct answer ✔Which of the following
is NOT a magnetic field associated with MR imaging?
A. Static magnetic fields
B. Oscillating magnetic fields (RF)
C. Time varying magnetic fields (gradient)
D. Gravitational earth magnetic fields
make the B0 field as homogenous as possible - correct answer ✔The
purpose of shimming the magnet is to:
A. make the B0 field as homogenous as possible
B. make the B1 field as homogenous as possible
C. make the scan time as short as possible
D. correct for gradient slopes
Reconstructing the images using the Fourier transform - correct answer
✔The array processor is responsible for:
