2026/2027 Exam Questions And Correct Answers (100%
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Active Shielding
A coil of wire with an electrical current running through it produces an
electromagnetic field opposing the static magnetic field to reduce the fringe field.
Bsub0
The unit is used to describe the static magnetic field.
Deflection
The amount of attraction an object has to the static magnetic field.
Diamagnetism
A weakly repulsive force when placed in a strong static magnetic field.
Faradays, the Law of Induction
This describes how electrical currents are produced in alternating magnetic fields.
,Ferromagnetism
An object with a strong, attractive force in a strong static magnetic field retains a
magnetic field even when leaving the strong static magnetic field.
Flux Lines
The gradient of magnetic densities that move from the north pole of the static
magnetic field to the south pole.
Horizontal Static Magnetic Field
A magnetic field vector that is horizontal.
Lenz's Force
The process of non-ferrous objects producing a magnetic field when moved
through a strong static magnetic field.
Magnetic Field Strength
The overall magnetic field strength of the MR unit.
,Magnetic Moment
Each hydrogen proton produces a particular magnetic field.
Magnetohydrodynamic Effect
When patients are exposed to a strong static magnetic field, their blood becomes
magnetized. This causes a high T wave in their cardiac cycle.
Fringe Field
The magnetic field extends outside the MR unit.
Gauss
A magnetic field unit of measurement.
Paramagnetic
A weakly attractive force when placed in a static magnetic field.
Passive Shielding
, Using magnetically conductive materials in an MR unit reduces the fringe field.
Pauli Exclusion Principle
The principle describes the atom structure and the types of magnetism
(ferromagnetism, paramagnetic, diamagnetism...).
Rotational Force
A force that aligns objects affected by the static magnetic field to its flux lines.
Superparamagnetic
When placed in a strong static magnetic field, a stronger attractive force than
superparamagnetic, but not as strong as ferromagnetism.
Teratogenic
The potential effects of a static magnetic field on the offspring of individuals
exposed to it.
Tesla
The unit of measurement is used to describe the static magnetic field.