Question 1
What type of nonionizing electromagnetic radiation does MR use?
A. x-ray
B. Gamma
C. Radiofrequency
D. Alpha
CORRECT ANSWER
C. Radiofrequency
Question 2
Preventing potentially serious injury or death from strong magnetic field strengths
requires:
i. A knowledgeable and concerned MR technologist
ii. Controlled access to the magnetic field
iii. A detailed medical history of anyone entering the room
CORRECT ANSWER
1,2,3
Question 3
When protons spin in place within the atom they create
A. A small magnetic field
1
@THE STUDY VAULT
,B. A small hydrogen moment
C. An electrical charge
D. Pressure on the electron
CORRECT ANSWER
A. A small magnetic field
Question 4
The process of producing voltage using magnetic fields is called
A. Electromagnetic induction
B. The Larmor equation
C. Megnetic generation
D. Static electric production
CORRECT ANSWER
A. Electromagnetic induction
Question 5
The steepness of the gradient slope or the power of the gradient is termed
A. Gradient slew rate
B. Gradient amplitude
C. Gradient rise time
D. Gradient direction
CORRECT ANSWER
B. Gradient amplitude
2
@THE STUDY VAULT
,Question 6
One Tesla is equal to___gauss
A. 100
B. 1,000
C. 10,000
D. 100,000
CORRECT ANSWER
C. 10,000
Question 7
The static magnetic field of a PERMANENT magnet runs:
A. horizontally from bore to wall
B. Horizontally along the long axis of the patients body
C. In a stright line from the magnet bore to the edge of the room
D. Vertically from the ceiling to the floor
CORRECT ANSWER
D. Vertically from the ceiling to the floor
Question 8
Precessional frequency is determined by the ___equation
A. Faraday
B. Larmor
C. Precessional
D. Magnetic frequency
CORRECT ANSWER
3
@THE STUDY VAULT
, B. Larmor
Question 9
Adding additional electric coils to the cryostat to maintain magnetic field homogeneity is
called
A. Active shimming
B. Passive shimming
C. Gross adjustments
D. Active shielding
CORRECT ANSWER
A. Active shimming
Question 10
The _____ line is a perimeter around the scanner defining where the static field is
potentially hazardous
A. 1.5T circle
B. 3.0 T line
C. 3-gauss circle
D. 5-gauss line
CORRECT ANSWER
D. 5-gauss line
Question 11
The rapid loss of voltage induced within the coil after the RF excitation due to relaxation is
called
4
@THE STUDY VAULT
What type of nonionizing electromagnetic radiation does MR use?
A. x-ray
B. Gamma
C. Radiofrequency
D. Alpha
CORRECT ANSWER
C. Radiofrequency
Question 2
Preventing potentially serious injury or death from strong magnetic field strengths
requires:
i. A knowledgeable and concerned MR technologist
ii. Controlled access to the magnetic field
iii. A detailed medical history of anyone entering the room
CORRECT ANSWER
1,2,3
Question 3
When protons spin in place within the atom they create
A. A small magnetic field
1
@THE STUDY VAULT
,B. A small hydrogen moment
C. An electrical charge
D. Pressure on the electron
CORRECT ANSWER
A. A small magnetic field
Question 4
The process of producing voltage using magnetic fields is called
A. Electromagnetic induction
B. The Larmor equation
C. Megnetic generation
D. Static electric production
CORRECT ANSWER
A. Electromagnetic induction
Question 5
The steepness of the gradient slope or the power of the gradient is termed
A. Gradient slew rate
B. Gradient amplitude
C. Gradient rise time
D. Gradient direction
CORRECT ANSWER
B. Gradient amplitude
2
@THE STUDY VAULT
,Question 6
One Tesla is equal to___gauss
A. 100
B. 1,000
C. 10,000
D. 100,000
CORRECT ANSWER
C. 10,000
Question 7
The static magnetic field of a PERMANENT magnet runs:
A. horizontally from bore to wall
B. Horizontally along the long axis of the patients body
C. In a stright line from the magnet bore to the edge of the room
D. Vertically from the ceiling to the floor
CORRECT ANSWER
D. Vertically from the ceiling to the floor
Question 8
Precessional frequency is determined by the ___equation
A. Faraday
B. Larmor
C. Precessional
D. Magnetic frequency
CORRECT ANSWER
3
@THE STUDY VAULT
, B. Larmor
Question 9
Adding additional electric coils to the cryostat to maintain magnetic field homogeneity is
called
A. Active shimming
B. Passive shimming
C. Gross adjustments
D. Active shielding
CORRECT ANSWER
A. Active shimming
Question 10
The _____ line is a perimeter around the scanner defining where the static field is
potentially hazardous
A. 1.5T circle
B. 3.0 T line
C. 3-gauss circle
D. 5-gauss line
CORRECT ANSWER
D. 5-gauss line
Question 11
The rapid loss of voltage induced within the coil after the RF excitation due to relaxation is
called
4
@THE STUDY VAULT
