ASRT Test Questions (Modules 1-12 ) Exam With
Complete Solutions | Latest Update 2026/2027 |
Graded A+ | 100% Assured Pass.
The most common type of magnet used in today's MR systems is the
_______________.
A. resistive magnet
B. permanent magnet
C. superconducting magnet
D. open MR scanner - Answer C. superconducting magnet
The positively charged part of an atom is the _____________.
A. electron
B. neutron
C. proton
D. nucleus - Answer C. proton
When a hydrogen nucleus is positively charged and spins, it generates a small
magnetic field called a _____________.
A. larmor equation
B. decay moment
C. proton moment
D. magnetic moment - Answer D. magnetic moment
When placed in an external magnetic field, low-energy hydrogen nuclei (protons)
point in the ____________ direction.
A. parallel
B. perpendicular
C. antiparallel
D. random - Answer A. parallel
What term describes hydrogen protons, nuclei rotating in unison?
A. out-of-phase precession
B. in-phase precession
C. magnetic moment
D. nucleus of atoms - Answer B. in-phase precession
This process of applying RF energy to the patient in order to receive a signal from
the protons in the body part being imaged is known as ______________.
,A. alignment
B. resonance
C. precession
D. gyromagnetic ratio - Answer B. resonance
Which of the following is used to describe the relationship between the static
magnetic field and the precessional frequency of the hydrogen protons?
A. concept of precessing
B. larmor equation
C. theory of magnetism
D. MR equation - Answer B. larmor equation
Superconductive MR scanners that use cryogen gases have what kind of fields?
A. vertical
B. longitudinal
C. horizontal
D. transverse - Answer C. horizontal
Which coil is located closes to the patient?
A. magnet
B. gradient
C. shim
D. radiofrequency - Answer D. radiofrequency
When exposed to the magnetic field, a ___________ substance demonstrates a
negative magnetic susceptibility, which means it is repelled by the magnetic field.
A. ferromagnetic
B. paramagnetic
C. superparamagnetic
D. diamagnetic - Answer D. diamagnetic
Which of the following is a disadvantage of superconducting magnets?
A. high operational costs
B. low field strength
C. expensive to purchase
D. vertical magnetic field - Answer C. expensive to purchase
The magnet must be shimmed before imaging sequences to:
A. match the precessional frequency of hydrogen
B. increase the strength of the radiofrequency pulse
, C. create a uniform magnetic field
D. decrease the fringe field - Answer C. create a uniform magnetic field
The location of an electron excited by magnetic fields and radiofrequency pulses can
be determined using ____________ and an x, y, z, coordinate system.
A. x-rays
B. waveforms
C. gradients
D. microwaves - Answer C. gradients
Which of the following factors can change the strength of an electromagnet? 1. the
number of loops in the electromagnetic coil. 2. the current passing through the loops.
3. the spacing of the loops.
A. 1 and 2
B. 1 and 3
C. 2 and 3
D. 1, 2, and 3 - Answer D. 1, 2 and 3
The _____________ coil is used to create homogeneity within the magnetic field.
A. electromagnet
B. RF
C. z gradient
D. shim - Answer D. shim
Which of the following is a characteristic of ultra-high field magnets?
A. signal-to-noise ratios are high and faster imaging times are possible.
B. the scanner has an open design and large gantry aperture
C. magnetic fringe fields are relatively small
D. scanners are light and portable - Answer A. signal to noise ratios are high and
faster imaging times are possible
Which type of magnet varies in field strength from 0.5 to 1.4 tesla (T)?
A. ultra-high field
B. high field
C. midfield
D. low field - Answer C. midfield
Which of the following is an appropriate use of low-field magnets?
A. orthopedic studies
B. chemical saturation imaging
C. neurovascular studies
D. intraoperative imaging - Answer A. orthopedic studies
Complete Solutions | Latest Update 2026/2027 |
Graded A+ | 100% Assured Pass.
The most common type of magnet used in today's MR systems is the
_______________.
A. resistive magnet
B. permanent magnet
C. superconducting magnet
D. open MR scanner - Answer C. superconducting magnet
The positively charged part of an atom is the _____________.
A. electron
B. neutron
C. proton
D. nucleus - Answer C. proton
When a hydrogen nucleus is positively charged and spins, it generates a small
magnetic field called a _____________.
A. larmor equation
B. decay moment
C. proton moment
D. magnetic moment - Answer D. magnetic moment
When placed in an external magnetic field, low-energy hydrogen nuclei (protons)
point in the ____________ direction.
A. parallel
B. perpendicular
C. antiparallel
D. random - Answer A. parallel
What term describes hydrogen protons, nuclei rotating in unison?
A. out-of-phase precession
B. in-phase precession
C. magnetic moment
D. nucleus of atoms - Answer B. in-phase precession
This process of applying RF energy to the patient in order to receive a signal from
the protons in the body part being imaged is known as ______________.
,A. alignment
B. resonance
C. precession
D. gyromagnetic ratio - Answer B. resonance
Which of the following is used to describe the relationship between the static
magnetic field and the precessional frequency of the hydrogen protons?
A. concept of precessing
B. larmor equation
C. theory of magnetism
D. MR equation - Answer B. larmor equation
Superconductive MR scanners that use cryogen gases have what kind of fields?
A. vertical
B. longitudinal
C. horizontal
D. transverse - Answer C. horizontal
Which coil is located closes to the patient?
A. magnet
B. gradient
C. shim
D. radiofrequency - Answer D. radiofrequency
When exposed to the magnetic field, a ___________ substance demonstrates a
negative magnetic susceptibility, which means it is repelled by the magnetic field.
A. ferromagnetic
B. paramagnetic
C. superparamagnetic
D. diamagnetic - Answer D. diamagnetic
Which of the following is a disadvantage of superconducting magnets?
A. high operational costs
B. low field strength
C. expensive to purchase
D. vertical magnetic field - Answer C. expensive to purchase
The magnet must be shimmed before imaging sequences to:
A. match the precessional frequency of hydrogen
B. increase the strength of the radiofrequency pulse
, C. create a uniform magnetic field
D. decrease the fringe field - Answer C. create a uniform magnetic field
The location of an electron excited by magnetic fields and radiofrequency pulses can
be determined using ____________ and an x, y, z, coordinate system.
A. x-rays
B. waveforms
C. gradients
D. microwaves - Answer C. gradients
Which of the following factors can change the strength of an electromagnet? 1. the
number of loops in the electromagnetic coil. 2. the current passing through the loops.
3. the spacing of the loops.
A. 1 and 2
B. 1 and 3
C. 2 and 3
D. 1, 2, and 3 - Answer D. 1, 2 and 3
The _____________ coil is used to create homogeneity within the magnetic field.
A. electromagnet
B. RF
C. z gradient
D. shim - Answer D. shim
Which of the following is a characteristic of ultra-high field magnets?
A. signal-to-noise ratios are high and faster imaging times are possible.
B. the scanner has an open design and large gantry aperture
C. magnetic fringe fields are relatively small
D. scanners are light and portable - Answer A. signal to noise ratios are high and
faster imaging times are possible
Which type of magnet varies in field strength from 0.5 to 1.4 tesla (T)?
A. ultra-high field
B. high field
C. midfield
D. low field - Answer C. midfield
Which of the following is an appropriate use of low-field magnets?
A. orthopedic studies
B. chemical saturation imaging
C. neurovascular studies
D. intraoperative imaging - Answer A. orthopedic studies
