MRSO Terms Sheet Test Study Questions and 100% Correct Verified Answers
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Course
MRSO
Institution
MRSO
MRSO Terms Sheet Test Study Questions and
100% Correct Verified Answers
Spatial Gradient Magnetic - Answer The changing magnetic field strength demonstrated
at different distances from the MR unit.
Static Magnetic Field - Answer The magnetic field that aligns hydrogen nuclei parallel or
anti-p...
MRSO Terms Sheet Test Study Questions and
100% Correct Verified Answers
Spatial Gradient Magnetic - Answer The changing magnetic field strength demonstrated
at different distances from the MR unit.
Static Magnetic Field - Answer The magnetic field that aligns hydrogen nuclei parallel or
anti-parallel.
Superparamagnetic - Answer A stronger attractive force than superparamagnetic, but
not as strong as ferromagnetism when placed in a strong static magnetic field.
Teratogenic - Answer The potential effects of a static magnetic field on the offspring of
individuals exposed to it.
Tesla - Answer The unit of measurement used to describe the static magnetic field.
Translation Force - Answer The attractive for of an object as it translates through the
static gradient magnetic field.
Vector - Answer The direction of the static magnetic field.
Vertical Static Magnetic Field - Answer A magnetic field vector that is vertical.
Axial Imaging - Answer This is a set of imaging produced when the Z gradient is
activated.
,Coronal Imaging - Answer This is a set of imaging produced when the Y gradient is
activated.
Duty Cycle - Answer The amount of time that the gradient coils can remain active.
Golay Coil - Answer A pair of saddle electromagnetic coils located on the right and left,
and anterior and posterior of the patient, which produce strong magnetic fields from
left to right, and anterior to posterior.
Gradient Steepness - Answer The slope or amplitude of the gradient activated.
Logical Gradient - Answer Term used to describe the gradient activation in data
acquisition. This can be described as the slice selection gradient, phase encoding
gradient, and frequency encoding gradient.
Lorenz Force - Answer The torque caused on the MR gantry as the gradient coils are
activated. This produces the noises heard in MRI.
Magnetophosphenes - Answer Visually seeing flashing light when exposed to a changing
magnetic field. This is caused by nerve stimulation described by Faraday's law of
induction.
Maximum Gradient Field - Answer The largest amplitude witnessed.
Maxwell Coil - Answer A ring of electromagnetic coils located at the foot and head of the
patient surrounding the gantry that produced a strong gradient magnetic field from
head to foot.
, Noise Reduction Rating - Answer This is a way to measure the amount of noise reduced
by earplugs or headsets.
Nystagmus - Answer Uncontrollable movement of the eyes when exposed to a changing
magnetic field. This is caused by nerve stimulation described by Faraday's law of
induction.
Peripheral Nerve Stimulation - Answer When nerves are stimulated when exposed to a
changing magnetic field. This is caused by nerve stimulation described by Faraday's law
of induction.
Physical Gradient - Answer The term used to describe the spatial encoding of the
gradient coils. X gradient produces sagittal images, Y gradient produces coronal images,
and Z gradient produces axial images.
Precession - Answer The wobbling motion that hydrogen nuclei demonstrate.
Rise Time - Answer The period of time that it takes for the gradients to reach the
sequences maximum amplitude.
Sagittal Imaging - Answer This is a set of imaging produced when the X gradient is
activated.
Slew Rate - Answer The speed at which the gradient coils can change the gradient
magnetic fields.
90 Degree RF - Answer The amount of energy used to tilt hydrogen from longitudinal
magnetism into the transverse axis.
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