and Verified Answers Updated 2026 Certification
The use of a coil of wire, with an electrical current running through it , to produce
an electromagnetic field opposing the static magnetic field, to reduce the fringe
field. - VERIFIED ANSWER - Active Shielding
The unit used to describe the static magnetic field. - VERIFIED ANSWER - B sub 0
The amount of attraction an object has to the static magnetic field. - VERIFIED
ANSWER - Deflection
A weakly repulsive force when placed in a strong static magnetic field. - VERIFIED
ANSWER - Diamagnetism
This describes how electrical currents are produced in the presence of
alternating magnetic fields. - VERIFIED ANSWER - Faradays Law of Induction
An object with strong attractive force, in a strong static magnetic field, that
retains a magnetic field even when leaving the strong static magnetic field. -
VERIFIED ANSWER - ferromagnetism
,The gradient of magnetic densities that move from the north pole of the static
magnetic field to the south pole. - VERIFIED ANSWER - Flux lines
The magnetic field that extends outside the MR unit. - VERIFIED ANSWER - Fringe
Field
A magnetic field unit of measurement. - VERIFIED ANSWER - Gauss
A magnetic field vector that is horizontal. - VERIFIED ANSWER - Horizontal Static
Magnetic Field
The process of non-ferrous objects producing a magnetic field when moved
through a strong static magnetic field. - VERIFIED ANSWER - Lenz's Force
The overall magnetic field strength of the MR unit. - VERIFIED ANSWER - Magnetic
Field Strength
An individual magnetic field produced by each hydrogen proton. - VERIFIED
ANSWER - Magnetic Moment
When a patient is exposed to a strong static magnetic field, their blood becomes
magnetized. This causes an elevated T wave in their cardiac cycle. - VERIFIED
ANSWER - Magnohydrodynamic Effect
,A weekly attractive force when placed in a static magnetic field. - VERIFIED
ANSWER - Paramagnetic
The use of magnetically conductive materials in an MR unit to reduce the fringe
field. - VERIFIED ANSWER - Passive Shielding
The principle that describes the atom structure and the types of magnetism (
ferromagnetism, paramagnetic, diamagnetism...). - VERIFIED ANSWER - Pauli
Exclusion Principle
A force which aligns objects affected by the static magnetic field to its flux lines. -
VERIFIED ANSWER - Rotational Force
The changing magnetic field strength demonstrated at different distances from
the MR unit. - VERIFIED ANSWER - Spatial Gradient Magnetic Field
The magnetic field that aligns hydrogen nuclei parallel or anti-parallel. - VERIFIED
ANSWER - Static Magnetic Field
A stronger attractive force than superparamagnetic but not as strong as
ferromagnetism when placed in a strong static magnetic field. - VERIFIED ANSWER
- Superparamagnetic
, The potential effects of a static magnetic field on the offspring of individuals
exposed to it. - VERIFIED ANSWER - Teratogenic
The unit of measurement used to describe the static magnetic field. - VERIFIED
ANSWER - Tesla
The attractive force of an object as it translates through the static gradient
magnetic field. - VERIFIED ANSWER - Translation Force
The direction of the static magnetic field. - VERIFIED ANSWER - Vector
A magnetic field vector that is vertical. - VERIFIED ANSWER - Vertical Static
Magnetic Field
This is a set of imaging produced when the Z gradient is activated. - VERIFIED
ANSWER - Axial Imaging
This is a set of imaging produced when the Y gradient is activated. - VERIFIED
ANSWER - Coronal Imaging
The amount of time that the gradient coils can remain active. - VERIFIED ANSWER -
Duty Cycle