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PARAMETER TRADEOFFS Flashcards

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1
Q

IF YOU INCREASE TR WHAT HAPPENS TO SNR?

A

INCREASES SNR

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2
Q

IF YOU INCREASE TR WHAT HAPPENS TO SCAN TIME?

A

INCREASES SCAN TIME

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3
Q

IF YOU INCREASE TR WHAT HAPPENS TO IMAGE DETAIL?

A

NO CHANGE

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4
Q

IF YOU INCREASE TR WHAT HAPPENS TO SAR?

A

DECREASES SAR

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5
Q

IF YOU INCREASE TR WHAT HAPPENS TO T1 WEIGHTING?

A

DECREASES T1 WEIGHTING

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6
Q

IF YOU INCREASE TR WHAT HAPPENS TO AVAILABLE # OF SLICES?

A

INCREASES AVAILABLE # OF SLICES

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7
Q

IF YOU INCREASE TE WHAT HAPPENS TO SNR?

A

DECREASES SNR

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8
Q

IF YOU INCREASE TE WHAT HAPPENS TO SCAN TIME?

A

INDIRECTLY DECREASES SCAN TIME

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9
Q

IF YOU INCREASE TE WHAT HAPPENS TO IMAGE DETAIL?

A

NO CHANGE

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10
Q

IF YOU INCREASE TE WHAT HAPPENS TO SAR?

A

NO CHANGE

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11
Q

IF YOU INCREASE TE WHAT HAPPENS TO AVAILABLE # OF SLICES?

A

DECREASES AVAILABLE # OF SLICES

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12
Q

IF YOU INCREASE TE WHAT HAPPENS TO T2 WEIGHTING?

A

INCREASES T2 WEIGHTING

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13
Q

IF YOU INCREASE FOV WHAT HAPPENS TO SNR?

A

INCREASES SNR

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14
Q

IF YOU INCREASE FOV WHAT HAPPENS TO SCAN TIME?

A

NO CHANGE

(UNLESS VOEL SIZE IS CONSTANT)

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15
Q

IF YOU INCREASE FOV WHAT HAPPENS TO IMAGE DETAIL?

A

DECREASES SPATIAL RESOLUTION

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16
Q

IF YOU INCREASE FOV WHAT HAPPENS TO SAR?

A

NO CHANGE

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17
Q

IF YOU INCREASE FOV WHAT HAPPENS TO COVERAGE AREA?

A

INCREASES COVERAGE AREA

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18
Q

IF YOU INCREASE NSA/NEX WHAT HAPPENS TO SNR?

A

INCREASES SNR

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19
Q

IF YOU INCREASE NSA/NEX WHAT HAPPENS TO SCAN TIME?

A

INCREASES SCAN TIME

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20
Q

IF YOU INCREASE NSA/NEX WHAT HAPPENS TO IMAGE DETAIL?

A

NO CHANGE

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21
Q

IF YOU INCREASE NSA/NEX WHAT HAPPENS TO SAR?

A

INCREASES SAR

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22
Q

IF YOU INCREASE ETL/TSE WHAT HAPPENS TO SNR?

A

DECREASES SNR

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23
Q

IF YOU INCREASE ETL/TSE WHAT HAPPENS TO SCAN TIME?

A

DECREASES SCAN TIME

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24
Q

IF YOU INCREASE ETL/TSE WHAT HAPPENS TO IMAGE DETAIL?

A

NO CHANGE

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25
IF YOU INCREASE ETL/TSE WHAT HAPPENS TO SAR?
INCREASES SAR
26
IF YOU INCREASE ETL/TSE WHAT HAPPENS TO BLURRING?
INCREASES IMAGE BLURRING
27
IF YOU INCREASE TI WHAT HAPPENS TO SNR?
DECREASES SNR
28
IF YOU INCREASE TI WHAT HAPPENS TO SCAN TIME?
INCREASES SCAN TIME | (DUE TO REQUIRED INCREASE OF TR)
29
IF YOU INCREASE TI WHAT HAPPENS TO IMAGE DETAIL?
NO CHANGE
30
IF YOU INCREASE TI WHAT HAPPENS TO SAR?
NO CHANGE
31
IF YOU INCREASE TI WHAT HAPPENS TO TISSUE SATURATION?
INCREASES TISSUE SATURATION
32
IF YOU INCREASE PHASE MATRIX WHAT HAPPENS TO SNR?
DECREASES SNR
33
IF YOU INCREASE PHASE MATRIX WHAT HAPPENS TO SCAN TIME?
INCREASES SCAN TIME
34
IF YOU INCREASE PHASE MATRIX WHAT HAPPENS TO IMAGE DETAIL?
INCREASES SPATIAL RESOLUTION
35
IF YOU INCREASE PHASE MATRIX WHAT HAPPENS TO SAR?
INCREASES SAR | INDIRECTLY
36
IF YOU INCREASE PHASE MATRIX WHAT HAPPENS TO GIBBS-TRUNCATION ARTIFACTS?
INCREASES GIBBS-TRUNCATION ARTIFACTS | Gibbs artifacts-also known as truncation, ringing, or spectral leakage
37
IF YOU INCREASE FLIP ANGLE WHAT HAPPENS TO SNR?
INCREASES SNR
38
IF YOU INCREASE FLIP ANGLE WHAT HAPPENS TO SCAN TIME?
NO CHANGE
39
IF YOU INCREASE FLIP ANGLE WHAT HAPPENS TO IMAGE DETAIL?
NO CHANGE
40
IF YOU INCREASE FLIP ANGLE WHAT HAPPENS TO SAR?
INCREASES SAR
41
IF YOU INCREASE FLIP ANGLE WHAT HAPPENS TO SUSCEPTIBILITY?
DECREASES SUSCEPTIBILTY
42
IF YOU INCREASE rBw WHAT HAPPENS TO SNR?
DECREASES SNR
43
IF YOU INCREASE rBw WHAT HAPPENS TO SCAN TIME?
DECREASES SCAN TIME
44
IF YOU INCREASE rBw WHAT HAPPENS TO IMAGE DETAIL?
NO CHANGE
45
IF YOU INCREASE rBw WHAT HAPPENS TO SAR?
NO CHANGE
46
IF YOU INCREASE rBw WHAT HAPPENS TO CHEMICAL SHIFT & METAL ARTIFACTS?
DECREASES BOTH CHEMICAL SHIFT & METAL ARTIFACTS
47
IF YOU INCREASE PI ***(PARALLEL IMAGING***) REDUCTION FACTOR WHAT HAPPENS TO SNR?
DECREASES SNR
48
IF YOU INCREASE PI ***(PARALLEL IMAGING***) REDUCTION FACTOR WHAT HAPPENS TO SCAN TIME?
DECREASES SCAN TIME
49
IF YOU INCREASE PI ***(PARALLEL IMAGING***) REDUCTION FACTOR WHAT HAPPENS TO IMAGE DETIAL?
NO CHANGE
50
IF YOU INCREASE PI ***(PARALLEL IMAGING***) REDUCTION FACTOR WHAT HAPPENS TO DWI SUSCEPTIBILITY ARTIFACTS?
DECREASES DWI SUSCEPTIBILITY ARTIFACTS
50
IF YOU INCREASE DWI B-VALUE WHAT HAPPENS TO SNR?
DECREASES SNR
50
IF YOU INCREASE PI ***(PARALLEL IMAGING***) REDUCTION FACTOR WHAT HAPPENS TO SAR?
DECREASES SAR
51
IF YOU INCREASE DWI B-VALUE WHAT HAPPENS TO SCAN TIME?
INCREASES SCAN TIME | DUE TO REQUIRED INCREASE OF TR
52
IF YOU INCREASE DWI B-VALUE WHAT HAPPENS TO IMAGE DETAIL?
NO CAHNGE
53
IF YOU INCREASE DWI B-VALUE WHAT HAPPENS TO SAR?
NO CHANGE
54
IF YOU INCREASE DWI B-VALUE WHAT HAPPENS TO DETECTION OF STROKE/NEOPLASM?
INCREASES DETECTION OF STROKE/NEOPLASM
55
IF YOU INCREASE # SAT BANDS WHAT HAPPENS TO SNR?
DECREASES SNR
56
IF YOU INCREASE # SAT BANDS WHAT HAPPENS TO SCAN TIME?
INCREASES SCAN TIME | DUE TO REQUIRED INCREASE OF TR
57
IF YOU INCREASE # SAT BANDS WHAT HAPPENS TO IMAGE DETAIL?
NO CHANGE
58
IF YOU INCREASE # SAT BANDS WHAT HAPPENS TO SAR?
INCREASES SAR
59
IF YOU INCREASE # SAT BANDS WHAT HAPPENS TO MOTION/FLOW ARTIFACTS?
DEREASES MOTION/FLOW ARTIFACTS
60
IF YOU INCREASE SLICE THICKNESS WHAT HAPPENS TO SNR?
INCREASES SNR
61
IF YOU INCREASE SLICE THICKNESS WHAT HAPPENS TO SCAN TIME?
NO CHANGE
62
IF YOU INCREASE SLICE THICKNESS WHAT HAPPENS TO IMAGE DETAIL?
DECREASES SPATIAL RESOLUTION
63
IF YOU INCREASE SLICE THICKNESS WHAT HAPPENS TO SAR?
NO CHANGE
64
IF YOU INCREASE SLICE THICKNESS WHAT HAPPENS TO PARTIAL VOLUME ARTIFACTS?
INCREASES PARTIAL VOLUME ARTIFACTS
65
IF YOU INCREASE # OF SLICES ACQUIRED WHAT HAPPENS TO SNR?
NO CHANGE
66
IF YOU INCREASE # OF SLICES ACQUIRED WHAT HAPPENS TO SCAN TIME?
INCREASES SCAN TIME | DUE TO REQUIRED INCREASED OF TR
67
IF YOU INCREASE # OF SLICES ACQUIRED WHAT HAPPENS TO IMAGE DETAIL?
NO CHANGE
68
IF YOU INCREASE # OF SLICES ACQUIRED WHAT HAPPENS TO SAR?
INCREASES SAR
69
IF YOU INCREASE # OF SLICES ACQUIRED WHAT HAPPENS TO ANATOMIC COVERAGE?
INCREASED ANATOMIC COVERAGE
70
WHAT PARAMETER ARE EFFECTED BY TR?
1. SNR 2. SCAN TIME 3. SAR 4. # OF SLICES 5. T1 WEIGHTING
71
WHAT PARAMETER ARE EFFECTED BY TE?
1. SNR 2. SCAN TIME 3. #OF SLICES 4. T2 WEIGHTING
72
WHAT PARAMETER ARE EFFECTED BY FOV?
1. SNR 2. IMAGE DETAIL (SPATIAL RESOLUTION) 3. COVERAGE AREA
73
WHAT PARAMETER ARE EFFECTED BY NSA/NEX?
1. SNR 2. SCAN TIME 3. SAR 4. MOTION
74
WHAT PARAMETER ARE EFFECTED BY ETL/TSE?
1. SNR 2. SCAN TIME 3. SAR 4. BLURRING
75
WHAT PARAMETER ARE EFFECTED BY TI?
1. SNR 2. SCAN TIME 3. TISSUE SATURATION
76
WHAT PARAMETER ARE EFFECTED BY PHASE MATRIX?
1. SNR 2. SCAN TIME 3. IMAGE DETAIL (SPATIAL RESOLUTION) 4. SAR 5. GIBBS ARTIFACT
77
WHAT PARAMETER ARE EFFECTED BY FLIP ANGLE?
1. SNR 2. SAR 3. SUSCEPTIBILITY
78
WHAT PARAMETER ARE EFFECTED BY rBw?
1. SNR 2. SCAN TIME 3. CHEMICAL SHIFT/METAL ARTIFACTS
79
WHAT PARAMETER ARE EFFECTED BY PI (PARALELL IMAGING)?
1. SNR 2. SCAN TIME 3. SAR 4. DWI SUSCEPTIBILITY ARTIFACTS
80
WHAT PARAMETER ARE EFFECTED BY DWI b-VALUE?
1. SNR 2. SCAN TIME 3. STROKE/NEOPLASM DETECTION
81
WHAT PARAMETER ARE EFFECTED BY # SAT BANDS?
1. SNR 2. SCAN TIME 3. SAR 4. MOTION/FLOW ARTIFACTS
82
WHAT PARAMETER ARE EFFECTED BY SLICE THICKNESS?
1. SNR 2. IMAGE DETAIL (SPATIAL RESOLUTION) 3. PARTIAL VOLUME ARTIFACTS
83
WHAT PARAMETER ARE EFFECTED BY # OF SLICES ACQUIRED?
1. SCAN TIME 2. SAR 3. ANATOMIC COVERAGE

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