MRSE Exam Questions and Answers | Latest
Update 2026/2027 | Graded A+ | Guaranteed
Pass (100% Correct)
Formula for temperature change in a patient
-:- dTp/dt = SAR/C, where C = 4186 J/kg, Tp = temperature
What is the most accurate way to measure energy dose to the patient?
-:- B1 + rms
Kinetic stability
-:- The rate at which a gadolinium agent dissociates
Thermodynamic stability
-:- the change that a gadolinium agent will transmetallate
How much does liquid helium expand when transitioning to gaseous helium?
, -:- >700x
Electric field density (JE) formula
-:- JE = Conductivity x electric field strength x B0 x V where V = velocity?
Diamagnetic
-:- Very small negative magnetic susceptibility (X), two electrons in an orbital
RF Pulse power (heating) formula
-:- Power = Flip Angle ^2 x (Tp / Tr) where Tp = pulse duration, Tr =
Slew rate formula
-:- Maximum Gradient Strength (mT/m) / Rise Time (ms)
What parameters can be changed to reduce Peripheral Nerve Stimulation (PNS)?
Increase rise time (reduces slew rate), decrease matrix/phase encoding
(reduces slope of gradient), increasing slice thickness (shallower slice selection
gradient), increase FOV (shallower frequency encoding gradient), phase
noisecanceling (opposite frequency to noise), increase echo time TE
, -:-
Nitinol is (paramagnetic/diamagnet/ferromagnetic)
-:- paramagnetic
Paramagnetic
-:- Very small positive magnetic susceptibility (X), one electron in an orbital
Ferromagnetic
-:- very large positive magnetic susceptibility (X), domains of directional magnetism
that can align with an external field, retains magnetism after being removed from field
In what direction relative to the magnetic flux will the strongest Lenz's force be produced?
-:- antiparallel
What is the ASTM duration of time defined for heating effects?
-:- 15 mins continuous scanning
Where is translational force at a maximum?
-:- edge of bore
, Where is translational force at a minimum?
-:- isocenter
Where is rotational force at a maximum?
-:- isocenter
What quantitative property of the gradient coils is responsible for Peripheral Nerve
Stimulation (PNS)?
-:- slew rate
What contrast agents are the most stable?
-:- macrocyclic, ionic
What is a common dose of gadolinium?
-:- 0.1 mmol/kg
Do RF fields extend outside the bore?
-:- no
Update 2026/2027 | Graded A+ | Guaranteed
Pass (100% Correct)
Formula for temperature change in a patient
-:- dTp/dt = SAR/C, where C = 4186 J/kg, Tp = temperature
What is the most accurate way to measure energy dose to the patient?
-:- B1 + rms
Kinetic stability
-:- The rate at which a gadolinium agent dissociates
Thermodynamic stability
-:- the change that a gadolinium agent will transmetallate
How much does liquid helium expand when transitioning to gaseous helium?
, -:- >700x
Electric field density (JE) formula
-:- JE = Conductivity x electric field strength x B0 x V where V = velocity?
Diamagnetic
-:- Very small negative magnetic susceptibility (X), two electrons in an orbital
RF Pulse power (heating) formula
-:- Power = Flip Angle ^2 x (Tp / Tr) where Tp = pulse duration, Tr =
Slew rate formula
-:- Maximum Gradient Strength (mT/m) / Rise Time (ms)
What parameters can be changed to reduce Peripheral Nerve Stimulation (PNS)?
Increase rise time (reduces slew rate), decrease matrix/phase encoding
(reduces slope of gradient), increasing slice thickness (shallower slice selection
gradient), increase FOV (shallower frequency encoding gradient), phase
noisecanceling (opposite frequency to noise), increase echo time TE
, -:-
Nitinol is (paramagnetic/diamagnet/ferromagnetic)
-:- paramagnetic
Paramagnetic
-:- Very small positive magnetic susceptibility (X), one electron in an orbital
Ferromagnetic
-:- very large positive magnetic susceptibility (X), domains of directional magnetism
that can align with an external field, retains magnetism after being removed from field
In what direction relative to the magnetic flux will the strongest Lenz's force be produced?
-:- antiparallel
What is the ASTM duration of time defined for heating effects?
-:- 15 mins continuous scanning
Where is translational force at a maximum?
-:- edge of bore
, Where is translational force at a minimum?
-:- isocenter
Where is rotational force at a maximum?
-:- isocenter
What quantitative property of the gradient coils is responsible for Peripheral Nerve
Stimulation (PNS)?
-:- slew rate
What contrast agents are the most stable?
-:- macrocyclic, ionic
What is a common dose of gadolinium?
-:- 0.1 mmol/kg
Do RF fields extend outside the bore?
-:- no
