MRI Instrumentation | ARMRIT MRI Certification
Preparation | Updated Questions and Answers Study Guide
Introduction
This document provides MRI instrumentation questions and
verified answers for ARMRIT exam preparation, covering MRI
magnet types, gradient coils, shim coils, RF coils, cryogens,
shielding systems, and MRI scanner components. It explains
the characteristics, advantages, and disadvantages of
permanent, resistive, and superconductive magnets, as well as
key concepts related to magnetic field generation and
maintenance. The material also includes MRI room design,
active and passive shielding, RF shielding, and cryogenic
systems used in modern MRI equipment.
Exams Questions and Answers
17.What are radio frequency coils ? --- correct precise
answer --- A smaller device used to transmit, receive or do
both.
18.What are surface coils ? --- correct precise answer ---
Receive only coils that are superficial body structures
19.What are the peripheral equipment ? --- correct precise
answer --- Cryogens
Dewar
20.What are cryogens ? --- correct precise answer --- A
substance that produce low temperatures.
, 21.What are the substances that produce low temperatures
within the mag-net ? --- correct precise answer --- Liquid
helium
Liquid nitrogen
22.What does liquid helium do to the magnet ? --- correct
precise answer --- It cools the main coil to 4 degrees kelvin
23.What does liquid nitrogen do the magnet ? --- correct
precise answer --- An insulator for the liquid helium from the
room
temperature
24.Is there a need for liquid nitrogen for MRI scanners today ?
--- correct precise answer --- the use of chillers which are
helium recycling systems (no)
25.What is the scan room used for ? --- correct precise
answer --- Specially designed for shielding
1.How many MRI Magnets are there and what are they ? ---
correct precise answer --- Three types
Permanent Resistive Superconductive
2.What is a permanent magnet ? --- correct precise answer -
-- Made up of naturally ferromagnetic material
3.What is the field strength of a permanent magnet ? ---
correct precise answer --- 0-.03 Tesla
Homogeneity is good
4.What are the advantages of a permanent magnet ? ---
correct precise answer --- No fringe field Low field strength
range
No electrical power to maintain B0 No cryogen
Preparation | Updated Questions and Answers Study Guide
Introduction
This document provides MRI instrumentation questions and
verified answers for ARMRIT exam preparation, covering MRI
magnet types, gradient coils, shim coils, RF coils, cryogens,
shielding systems, and MRI scanner components. It explains
the characteristics, advantages, and disadvantages of
permanent, resistive, and superconductive magnets, as well as
key concepts related to magnetic field generation and
maintenance. The material also includes MRI room design,
active and passive shielding, RF shielding, and cryogenic
systems used in modern MRI equipment.
Exams Questions and Answers
17.What are radio frequency coils ? --- correct precise
answer --- A smaller device used to transmit, receive or do
both.
18.What are surface coils ? --- correct precise answer ---
Receive only coils that are superficial body structures
19.What are the peripheral equipment ? --- correct precise
answer --- Cryogens
Dewar
20.What are cryogens ? --- correct precise answer --- A
substance that produce low temperatures.
, 21.What are the substances that produce low temperatures
within the mag-net ? --- correct precise answer --- Liquid
helium
Liquid nitrogen
22.What does liquid helium do to the magnet ? --- correct
precise answer --- It cools the main coil to 4 degrees kelvin
23.What does liquid nitrogen do the magnet ? --- correct
precise answer --- An insulator for the liquid helium from the
room
temperature
24.Is there a need for liquid nitrogen for MRI scanners today ?
--- correct precise answer --- the use of chillers which are
helium recycling systems (no)
25.What is the scan room used for ? --- correct precise
answer --- Specially designed for shielding
1.How many MRI Magnets are there and what are they ? ---
correct precise answer --- Three types
Permanent Resistive Superconductive
2.What is a permanent magnet ? --- correct precise answer -
-- Made up of naturally ferromagnetic material
3.What is the field strength of a permanent magnet ? ---
correct precise answer --- 0-.03 Tesla
Homogeneity is good
4.What are the advantages of a permanent magnet ? ---
correct precise answer --- No fringe field Low field strength
range
No electrical power to maintain B0 No cryogen
