FREE MRI Knowledge Questions and Answers

Question 1

Substances in the presence of an applied magnetic field that show a modest rise in magnetic field. They exhibit both positive and low susceptibility.

Accepted Answer

Paramagnetic

Answer

Superpapmagnetic

Answer

Ferromagnetic

Answer

Diamagnetic

Question 2

Positive susceptibility is present in these materials, however when exposed to an external magnetic field, they will stay magnetized even after the field is removed.

Accepted Answer

Ferromagnetic

Answer

Diamagnetic

Answer

Paramagnetic

Answer

Superpapmagnetic

Question 3

These materials are employed as T2 contrast agents because they show positive susceptibility, are stronger than paramagnetic materials but weaker than ferromagnetic materials.

Accepted Answer

Superpapmagnetic

Answer

Paramagnetic

Answer

Diamagnetic

Answer

Ferromagnetic

Question 4

Magnets formed of ferrous material found naturally or from blocks or slabs.

Accepted Answer

Permanent

Answer

Selenoid

Answer

Reistive

Answer

Superconducting

Question 5

To form a magnet field, wires are arranged side by side.

Accepted Answer

Selenoid magnet

Answer

Superconducting

Answer

Permanent magnet

Answer

Resistive magnet

Question 6

This magnet has a strength of up to 0.3 T, can be switched off, and can be used in both horizontal and vertical field systems.

Accepted Answer

Resistive magnet

Answer

Superconducting

Answer

Permanent magnet

Answer

Selenoid magnet

Question 7

Magnets that use liquid helium or cryogen to cool the wires after applying direct current to a coil of wire.

Accepted Answer

Superconducting

Answer

Selenoid magnet

Answer

Resistive magnet

Answer

Permanent magnet

Question 8

Most superconducting magnets have a (horizontal or vertical) magnetiic field and are of the design type __.

Accepted Answer

Selenoid magnet

Answer

Permanent magnet

Answer

Superconducting

Answer

Resistive magnet

Question 9

This kind of magnetic shielding confines the fringe field by using metal—typically steel—in the scan room walls.

Accepted Answer

Passive

Answer

Active

Question 10

This kind of magnetic shielding confines the main magnet's field by using other magnets and their corresponding magnetic fields.

Accepted Answer

Active

Answer

Passive

Substances in the presence of an applied magnetic field that show a modest rise in magnetic field.They exhibit both positive and low susceptibility.

Substances in the presence of an applied magnetic field that show a modest rise in magnetic field.
They exhibit both positive and low susceptibility.