MRSE Final Exam ( Updated 2025 ) 1 100
Complete Questions & Answers (Solved) 100%
Correct
What is the most accurate way to measure energy
dose to the patient? - ANSWER-B1 + rms
Formula for temperature change in a patient -
ANSWER-dTp/dt = SAR/C, where C = 4186 J/kg, Tp
= temperature
,How much does liquid helium expand when
transitioning to gaseous helium? - ANSWER->700x
Electric field density (JE) formula - ANSWER-JE =
Conductivity x electric field strength x B0 x V where
V = velocity?
Kinetic stability - ANSWER-The rate at which a
gadolinium agent dissociates
Thermodynamic stability - ANSWER-the change that
a gadolinium agent will transmetallate
Diamagnetic - ANSWER-Very small negative
magnetic susceptibility (X), two electrons in an
orbital
Paramagnetic - ANSWER-Very small positive
magnetic susceptibility (X), one electron in an orbital
,Ferromagnetic - ANSWER-very large positive
magnetic susceptibility (X), domains of directional
magnetism that can align with an external field,
retains magnetism after being removed from field
RF Pulse power (heating) formula - ANSWER-Power
= Flip Angle ^2 x (Tp / Tr) where Tp = pulse
duration, Tr =
Slew rate formula - ANSWER-Maximum Gradient
Strength (mT/m) / Rise Time (ms)
What parameters can be changed to reduce
Peripheral Nerve Stimulation (PNS)? - ANSWER-
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 noise-canceling (opposite
frequency to noise), increase echo time TE
Nitinol is (paramagnetic/diamagnet/ferromagnetic) -
ANSWER-paramagnetic
What quantitative property of the gradient coils is
responsible for Peripheral Nerve Stimulation (PNS)? -
ANSWER-slew rate
What contrast agents are the most stable? -
ANSWER-macrocyclic, ionic
What is a common dose of gadolinium? - ANSWER-
0.1 mmol/kg
In what direction relative to the magnetic flux will
the strongest Lenz's force be produced? - ANSWER-
antiparallel
Complete Questions & Answers (Solved) 100%
Correct
What is the most accurate way to measure energy
dose to the patient? - ANSWER-B1 + rms
Formula for temperature change in a patient -
ANSWER-dTp/dt = SAR/C, where C = 4186 J/kg, Tp
= temperature
,How much does liquid helium expand when
transitioning to gaseous helium? - ANSWER->700x
Electric field density (JE) formula - ANSWER-JE =
Conductivity x electric field strength x B0 x V where
V = velocity?
Kinetic stability - ANSWER-The rate at which a
gadolinium agent dissociates
Thermodynamic stability - ANSWER-the change that
a gadolinium agent will transmetallate
Diamagnetic - ANSWER-Very small negative
magnetic susceptibility (X), two electrons in an
orbital
Paramagnetic - ANSWER-Very small positive
magnetic susceptibility (X), one electron in an orbital
,Ferromagnetic - ANSWER-very large positive
magnetic susceptibility (X), domains of directional
magnetism that can align with an external field,
retains magnetism after being removed from field
RF Pulse power (heating) formula - ANSWER-Power
= Flip Angle ^2 x (Tp / Tr) where Tp = pulse
duration, Tr =
Slew rate formula - ANSWER-Maximum Gradient
Strength (mT/m) / Rise Time (ms)
What parameters can be changed to reduce
Peripheral Nerve Stimulation (PNS)? - ANSWER-
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 noise-canceling (opposite
frequency to noise), increase echo time TE
Nitinol is (paramagnetic/diamagnet/ferromagnetic) -
ANSWER-paramagnetic
What quantitative property of the gradient coils is
responsible for Peripheral Nerve Stimulation (PNS)? -
ANSWER-slew rate
What contrast agents are the most stable? -
ANSWER-macrocyclic, ionic
What is a common dose of gadolinium? - ANSWER-
0.1 mmol/kg
In what direction relative to the magnetic flux will
the strongest Lenz's force be produced? - ANSWER-
antiparallel
