Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > MRI > Flashcards

MRI Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Define angular momentum, precession, and larmour frequency

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is gyromagnetic ratio? For hydrogen?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Correctly label the regions of the EM spectrum

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Define NMV. How does field strength affect it?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Define flip angle

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Define phase

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Define the basics of MR signal generation and FID

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Define relaxation, recovery and decay

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Define T1 recovery

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Define T2 decay

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What causes signal / voltage induction?

A

Presence of COHERENT MAGNETIZATION IN TRANSVERSE PLANE

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Define TR and TE

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Detail susceptibility. What are the different groups of materials based on susceptibility?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What does chemical shift refer to?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Detail safety concerns: RF

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Detail safety concerns: Gradient magnetic field

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Detail safety concerns: Main magnetic field

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Detail the safety concerns related to : quench, fringe fields, and implants

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Detail permanent magnets

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Detail solenoid magnets

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Describe differences between open and closed bore systems

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Detail differences between volume and surface (inc subtypes) coils

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Detail features of MRI shielding

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Detail features of shimming

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Detail components of gradient system

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Detail the approximate location of key components of an MRI unit

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Which three characteristics of tissues are most importantn to determine T1 and T2 relaxation times?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

How do T1 recovery compare between fat and water?

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

How do T2 decay times compare between fat and water?

A
30
Q

Describe how T1 contrast is produced and how fat and water behave

A
31
Q

Describe how T2 contrast is produced, and behaviour of fat and water. REMEMBER -> FAT DOESNT ENTIRELY MAKE SENSE!

A
32
Q

Destribe how proton density contrast is produced

A
33
Q

Difference in T1 and T2 times in brain tissues

A
34
Q

List factors resultingin intrinsic and extrinsic contrast in MRI studies

A
35
Q

Describe T1 weighting

A
36
Q

Describe PD weighting

A
37
Q

Detail mechanism of T2* decay

A

-

38
Q

Define saturation

A
39
Q

Describe how spin echo works

A
40
Q

Describe sequences created with SINGLE REPHASING PULSE spin echo

A
41
Q

Describe sequences produced BY TWO REPHASING PULSE spin echo

A
42
Q

Describe basics of GRADIENT ECHO including advantages and disadvantages

A
43
Q

Detail how weighting is achieved in GRE sequences

A
44
Q

Complete the table: Spin vs gradient echo

A
45
Q

Detail role of gradients, and specifically SLICE SELECTION

A
46
Q

Detail frequency encoding gradient

A
47
Q

Complete the table! Slice select, freq and phase encoding gradients….

A
48
Q

Using the diagram, detail the TIMING of the different spatial encoding gradients

A
49
Q

Detail NSA / NEX

A
50
Q

Detail SNR. List 7 factors that affect it!

A
51
Q

Briefly describe FOV

A
52
Q

Detail role of SLICE GAP

A
53
Q

Detail 3 factors affecting SPATIAL RESOLUTION

A
54
Q

Detail 3 factors affecting scan time

A
55
Q

Detail features of Turbo spin echo

A
56
Q

What effect does increased turbo factor have on image production?

A
57
Q

Detail how weighting is achieved in TSE. What is TSE predominantly used for? Pros and cons

A
58
Q

Detail FLAIR sequence

A
59
Q

Detail STIR sequence

A
60
Q

Detail inversion recovery (general)

A
61
Q

Describe fat saturation

A
62
Q

Detail TOF phenomenon in SE -> What three factors does it depend on?

A
63
Q

Describe TOF in GRE images

A
64
Q

Detail TOF MRA

A
65
Q

Detail Phase contrast MRA

A
66
Q

What are MR myelographic sequences? THE MAIN ONE??

A
67
Q

Detail DWI / ADC

A
68
Q

Describe how MR agents (particularly GAD) work

A
69
Q

Dose of GAD

A
70
Q

Risks associated with GAD

A
71
Q

GAD AGENTS TABLE

Remember 2 safe ones and the one we use?

A

Safe ones: Gadoxetate, Gadobenate

We use: Gadobutrol

Physics (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions