What is MRI

Question 1

When did the MRI develop?

Answer 1

mid 1980s

Question 2

It offers a remarkable combination of safety, spatial & contrast resolution as well as multifaceted sensitivity & specificity

Answer 2

MRI

Question 3

What is MRI based on?

Answer 3

It is based on the phenomenon of nuclear magnetic resonance

Question 4

It is defined as increased amplitude of the oscillation of a system exposed to a periodic force

Answer 4

resonance

Question 5

It is the simplest & most abundant element in the human body

Answer 5

Hydrogen

Question 6

They do not contain neutrons and are often referred to simply as protons

Answer 6

Hydrogen nuclei

Question 7

This is the relationship between electricity & magnetism

Answer 7

reciprocal

Question 8

At the core of all MRI instruments, is a _________–magnetic field

Answer 8

homogenous

Question 9

This contain magnetic materials that directly create magnetic fields

Answer 9

permanent magnets

Question 10

This kind of magnet field is oriented along an axis that extends between 2 poles of the magnet

Answer 10

Permanent Magnetic field

Question 11

What kind of configuration does a permanent magnet have?

Answer 11

open

Question 12

This kind of magnets can also be generated perpendicular to an electric current flowing along a cylindrical coiled wire

Answer 12

resistive electromagnets

Question 13

what kind of configuration does resistive electromagnets have?

Answer 13

closed

Question 14

What is the strenght of a magnetic field?

Answer 14

approx 5000 gauss

Question 15

These kinds of magnets have a resistance to the flow of electric current

Answer 15

Superconducting magnets

Question 16

What is the signal created following the excitation of tissue by an RF pulse

Answer 16

Free induction decay