MRI 1

MRI 1

University

59 Qs

quiz-placeholder

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MRI 1

MRI 1

Assessment

Quiz

Science

University

Practice Problem

Easy

Created by

Al M

Used 4+ times

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59 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

MRI is based on the magnetic properties of ________.

oxygen atoms
carbon molecules

atomic nuclei

nitrogen ions

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The magnetism of atomic nuclei is very small, but if we have a very large number of nuclei, we can detect the ________ magnetisation.

individual

hydrogen

random
net

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does putting a patient in the strong magnetic field of an MRI scanner create?

Ultrasound waves for treatment
Thermal images for diagnosis

A temporary net magnetisation that we can manipulate

Electrical signals for monitoring

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The strength and behaviour of the induced magnetisation depends on the type of ________, and the way we perform the MRI scan.

device
frequency

current

tissue

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The human body contains lots of water (two hydrogen nuclei per water molecule) and, in most of us, lots of fat (many hydrogen nuclei per fat molecule).

False

True

6.

FILL IN THE BLANK QUESTION

1 min • 1 pt

The human body is about __% hydrogen by number of atoms. Most is in water which has strong magnetisation.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What two factors combine to make MRI feasible?

Prevalence of nuclei AND magnetic strength of the hydrogen nucleus magnetisation

Static electricity AND thermal imaging

High voltage AND light pulses

Weak magnetic fields AND sound waves

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