MRI Multiple Choice Questions with all Correct &
100% Verified Answers |Actual Complete Exam|
Already Graded A+
What type of nonionizing electromagnetic radiation does MR use?
A. x-ray
B. Gamma
C. Radiofrequency
D. Alpha ✔Correct Answer-C. Radiofrequency
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
When protons spin in place within the atom they create
A. A small magnetic field
B. A small hydrogen moment
C. An electrical charge
D. Pressure on the electron ✔Correct Answer-A. A small magnetic field
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
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
One Tesla is equal to___gauss
A. 100
B. 1,000
C. 10,000
D. 100,000 ✔Correct Answer-C. 10,000
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
Precessional frequency is determined by the ___equation
A. Faraday
,B. Larmor
C. Precessional
D. Magnetic frequency ✔Correct Answer-B. Larmor
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
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
The rapid loss of voltage induced within the coil after the RF excitation due to relaxation is called
A. Transverse magnetization
B. Longitudinal precession
C. Free induction decay
D. Repetition time ✔Correct Answer-C. Free induction decay
A superconducting magnetic field generally runs
A. In a diagonal line from top to bottom
B. Horizontally through the bore of the magnet
C. From the magnet bore to the door
D. Vertically from ceiling to floor ✔Correct Answer-B. Horizontally through the bore of the magnet
______are used to cool the wires of superconducting magnets
A. Special electrical systems
B. Solid cryogens
C. Liquid cryogens
D. Synthetic chemicals ✔Correct Answer-C. Liquid cryogens
Why are hydrogen protons used to create MR images?
i. They have an odd number of protons
ii. They are abundant in the human body
iii. They are negatively charged ✔Correct Answer-1 & 2 only
More hydrogen protons are aligned parallel to the main magnetic field in the ______ energy state
A. Low
B. Medium
C. Average
D. High ✔Correct Answer-A. Low
If working with a magnetically shielded MR system, one does not have to be as careful about bringing
ferrous objects around the magnet
T/F? ✔Correct Answer-False
Which of the following statements is true regarding resistive magnets?
, A. The tend to be inexpensive to operate
B. Resistive magnets can be shut off easily by discontinuing power
C. They are commonly used today in hospitals
D. Resistive magnets have high field strengths, but low frine fields ✔Correct Answer-B. Resistive
magnets can be shut off easily by discontinuing power
In a well-known accident that occurred in July 2001 a ____ flew through the scanner room
A. Set of forceps
B. Oxygen tank
C. Wheelchair
D. Emergency crash cart ✔Correct Answer-B. Oxygen tank
_______ is the absorption rate averaged over the entire body or over a small sample volume.
A. Specific absorption rate
B. Global absorption rate
C. RF absorption rate
D. Total RF absorption rate ✔Correct Answer-A. Specific absorption rate
Coils used within the MR imaging process typically are used to
A. Receive signal
B. Return signal
C. Validate signal
D. Alter signal ✔Correct Answer-A. Receive signal
The gradient field can potentially stimulate a patient's
A. Eyesight
B. Hearing activity
C. Peripheral nerves
D. Skin temperature ✔Correct Answer-C. Peripheral nerves
SAR is an abbreviation for? ✔Correct Answer-Specific Absorption Rate
According to ACR safety guidelines, Level 1 MR personnel have :
A. No training
B. Participates in minimal safety education programs
C. Been thoroughly trained in MR safety
D. Extensive MR safety training and full control of all zones ✔Correct Answer-B. Participates in
minimal safety education programs
The SNR relationship between the coil and the anatomy of interest can be described as the :
A. Fill factor
B. Receiver strength
C. Quality measure
D. Sensitivity training ✔Correct Answer-A. Fill factor
The strength and direction of a magnetic field may be symbolized as
A. A gyrometric ration
B. A sine wave
C. A vector
D. A set of coordinate axes ✔Correct Answer-C. A vector
100% Verified Answers |Actual Complete Exam|
Already Graded A+
What type of nonionizing electromagnetic radiation does MR use?
A. x-ray
B. Gamma
C. Radiofrequency
D. Alpha ✔Correct Answer-C. Radiofrequency
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
When protons spin in place within the atom they create
A. A small magnetic field
B. A small hydrogen moment
C. An electrical charge
D. Pressure on the electron ✔Correct Answer-A. A small magnetic field
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
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
One Tesla is equal to___gauss
A. 100
B. 1,000
C. 10,000
D. 100,000 ✔Correct Answer-C. 10,000
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
Precessional frequency is determined by the ___equation
A. Faraday
,B. Larmor
C. Precessional
D. Magnetic frequency ✔Correct Answer-B. Larmor
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
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
The rapid loss of voltage induced within the coil after the RF excitation due to relaxation is called
A. Transverse magnetization
B. Longitudinal precession
C. Free induction decay
D. Repetition time ✔Correct Answer-C. Free induction decay
A superconducting magnetic field generally runs
A. In a diagonal line from top to bottom
B. Horizontally through the bore of the magnet
C. From the magnet bore to the door
D. Vertically from ceiling to floor ✔Correct Answer-B. Horizontally through the bore of the magnet
______are used to cool the wires of superconducting magnets
A. Special electrical systems
B. Solid cryogens
C. Liquid cryogens
D. Synthetic chemicals ✔Correct Answer-C. Liquid cryogens
Why are hydrogen protons used to create MR images?
i. They have an odd number of protons
ii. They are abundant in the human body
iii. They are negatively charged ✔Correct Answer-1 & 2 only
More hydrogen protons are aligned parallel to the main magnetic field in the ______ energy state
A. Low
B. Medium
C. Average
D. High ✔Correct Answer-A. Low
If working with a magnetically shielded MR system, one does not have to be as careful about bringing
ferrous objects around the magnet
T/F? ✔Correct Answer-False
Which of the following statements is true regarding resistive magnets?
, A. The tend to be inexpensive to operate
B. Resistive magnets can be shut off easily by discontinuing power
C. They are commonly used today in hospitals
D. Resistive magnets have high field strengths, but low frine fields ✔Correct Answer-B. Resistive
magnets can be shut off easily by discontinuing power
In a well-known accident that occurred in July 2001 a ____ flew through the scanner room
A. Set of forceps
B. Oxygen tank
C. Wheelchair
D. Emergency crash cart ✔Correct Answer-B. Oxygen tank
_______ is the absorption rate averaged over the entire body or over a small sample volume.
A. Specific absorption rate
B. Global absorption rate
C. RF absorption rate
D. Total RF absorption rate ✔Correct Answer-A. Specific absorption rate
Coils used within the MR imaging process typically are used to
A. Receive signal
B. Return signal
C. Validate signal
D. Alter signal ✔Correct Answer-A. Receive signal
The gradient field can potentially stimulate a patient's
A. Eyesight
B. Hearing activity
C. Peripheral nerves
D. Skin temperature ✔Correct Answer-C. Peripheral nerves
SAR is an abbreviation for? ✔Correct Answer-Specific Absorption Rate
According to ACR safety guidelines, Level 1 MR personnel have :
A. No training
B. Participates in minimal safety education programs
C. Been thoroughly trained in MR safety
D. Extensive MR safety training and full control of all zones ✔Correct Answer-B. Participates in
minimal safety education programs
The SNR relationship between the coil and the anatomy of interest can be described as the :
A. Fill factor
B. Receiver strength
C. Quality measure
D. Sensitivity training ✔Correct Answer-A. Fill factor
The strength and direction of a magnetic field may be symbolized as
A. A gyrometric ration
B. A sine wave
C. A vector
D. A set of coordinate axes ✔Correct Answer-C. A vector
