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MRI Scan Principles Q > image contrast/weighting > Flashcards

image contrast/weighting Flashcards

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1
Q

: A sequence with a _________ TR and a _________ TE will exhibit T1 weighting

A

short; short

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2
Q

Which of the following statements is TRUE regarding spin echo sequences

A

T1 contrast is maximized with short TR’s

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3
Q

What is wrong with a T2 weighted, fast spin echo image that has a 1.1 second TR and an 90 millisecond TE?

A

The TR does not sufficiently minimize the T1 weighted contrast

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4
Q

Tissues with _______ are bright on T1 weighted spin echo scans and tissues with _________ are bright on T2 weighted spin echo scans

A

short T1 times; long T2 times

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5
Q

Enabling Driven Equilibrium will enable the operator to:

A

Reduce TR and preserve contrast

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6
Q

What determines the amount of T2 weighting in an image

A

TE

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7
Q

What determines the amount of T1 weighting in an image

A

TR

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8
Q

To produce an image based on differences in T1, the time interval between 90° excitation pulses should be:

A

Short

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9
Q

A sequence with a _________ TR and a _________ TE will exhibit PD weighting

A

Long; short

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10
Q

: A sequence with a _________ TR and a _________ TE will exhibit T2 weighting

A

Long; long

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11
Q

A T2 weighted image will have a repetition time (TR) in the range of

A

2000 - 6000 ms

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12
Q

A T2 weighted image will have an echo time (TE) in the range of:

A

80 - 120 ms

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13
Q

A T1 weighted image will have a repetition time (TR) in the range of

A

350 - 700 ms

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14
Q

A T1 weighted image will have an echo time (TE) in the range of:

A

10 - 30 ms

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15
Q

A proton density weighted image will have a repetition time (TR) in the range of:

A

1600 - 4000 ms

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16
Q

A proton density weighted image will have an echo time (TE) in the range of:

A

10 - 35 ms

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17
Q

Water is dark and fat is bright in

A

T1 weighted images

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18
Q

Which of the following parameter combinations would yield the most T2 weighted image?

A. 500 TR, 20 TE
B. 1600 TR, 30 TE
C. 2000 TR, 80 TE
D. 3500 TR, 120 TE

A

3500 TR, 120 TE

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19
Q

Which of the following parameter combinations would yield the most T1 weighting?

A. 350 TR, 15 TE
B. 500 TR, 25 TE
C. 1600 TR, 30 TE
D. 3500 TR, 120 TE

A

350 TR, 15 TE

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20
Q

Which of the following statements is FALSE

A

T1 weighting is adjusted with short TE’s

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21
Q

Water is hyperintense and fat is typically dark in

A

T2 weighted images

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22
Q

All of the following are properties of T1 weighting EXCEPT:

A

Transverse magnetization

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23
Q

All of the following are properties of T2 weighting EXCEPT

A

Flip angle controls contrast

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24
Q

All of the following are true EXCEPT

A

Gradient echo — 90° RF followed by 180° RF

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25
T1 is useful for \_\_\_\_\_\_\_\_\_\_, whereas T2 is utilized for depicting
Anatomy; pathology
26
All of the following are examples of INTRINSIC contrast parameters in tissues EXCEPT:
TR
27
All of the following are examples of EXTRINSIC contrast parameters EXCEPT:
T1 time
28
Structures that will always appear black on an MR image include all of the following EXCEPT:
CSF
29
Presaturation pulses typically occur
Prior to the excitation pulse
30
Increasing the TE in a spin echo pulse sequence
Enables more T2 information in the image
31
In an inversion recovery sequence, image contrast is controlled by A. TR B. TE C. TI D. All of the above
All of the above
32
Chemical or spectral fat suppression techniques suppress fat signal based on the:
Precessional frequency of fat
33
Which of the following sets of parameters would show edema as hyperintense
4000 TR, 90 TE
34
As the TR increases the amount of T1 weighted contrast \_\_\_\_\_\_\_\_\_\_\_.
Decreases
35
A Proton Density weighted image has a TR that is long to \_\_\_\_\_\_\_\_\_\_\_\_\_, and a TE that is short to \_\_\_\_\_
Minimize T1 contrast; minimize T2 contrast
36
Column A in Image 105 corresponds to which MRI pulse sequence
T1 weighted
37
Column B in Image 105 corresponds to which MRI pulse sequence
Proton density
38
Column C in Image 105 corresponds to which MRI pulse sequence
Proton density with fat suppression
39
Column D in Image 105 corresponds to which MRI pulse sequence
T2 weighted
40
Column A in Image 106 corresponds to which MRI pulse sequence
T2 weighted
41
Column B in Image 106 corresponds to which MRI pulse sequence
T1 weighted
42
Column C in Image 106 corresponds to which MRI pulse sequence
Proton density
43
Column D in Image 106 corresponds to which MRI pulse sequence
STIR
44
Column A in Image 107 corresponds to which MRI pulse sequence?
T2 weighted
45
Column C in Image 107 corresponds to which MRI pulse sequence
Proton density
46
Column D in Image 107 corresponds to which MRI pulse sequence?
STIR
47
Column A in Image 108 corresponds to which MRI pulse sequence?
T2 weighted
48
Column B in Image 108 corresponds to which MRI pulse sequence
T1 weighted
49
Column C in Image 108 corresponds to which MRI pulse sequence
Proton density
50
Column D in Image 108 corresponds to which MRI pulse sequence
T2 weighted with fat suppression
51
Column A in Image 109 corresponds to which MRI pulse sequence?
T2 weighted
52
Column B in Image 109 corresponds to which MRI pulse sequence
T1 weighted
53
Column C in Image 109 corresponds to which MRI pulse sequence
Proton density
54
Column D in Image 109 corresponds to which MRI pulse sequence
T2 weighted with fat suppression
55
Column A in Image 111 corresponds to which MRI pulse sequence
T2 weighted
56
Column B in Image 111 corresponds to which MRI pulse sequence
Proton density
57
Column C in Image 111 corresponds to which MRI pulse sequence
T1 weighted
58
Column D in Image 111 corresponds to which MRI pulse sequence?
T2 FLAIR
59
Column A in Image 112 corresponds to which MRI pulse sequence?
T2 weighted
60
Column C in Image 112 corresponds to which MRI pulse sequence
T1 weighted
61
Column D in Image 112 corresponds to which MRI pulse sequence
T2 FLAIR
62
Which column in Image 113 would be best suited for evaluation of demyelinating disease?
Column D
63
Which sequence's column in Image 113 would be repeated following the administration of a GBCA (gadolinium based contrast agent)?
Column C
64
Column B in Image 112 corresponds to which MRI pulse sequence?
Proton density

MRI Scan Principles Q (6 decks)

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