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問題一覧
1
Detecting For early stroke
DWI
2
Made application of EPI
Dynamic …
3
Unwanted currents
Eddy Currents
4
Pulse sequence primarily used for mri
Bold Imaging
5
What happens during MRI quench?
Liquid cryogen would evaporate
6
Term for the collection of all signals
K Shell
7
Which coil offers the best RF homogeneity
Bird cage (for large body parts)
8
Most common adverse reaction
Headache
9
What is the cause of multiple sclerosis
DIR
10
Imaging turbulent blood flow
Fast Gradient Recoil Echo
11
If quench does occur
Evacuate
12
Which imaging technique suppresses your csf?
FLAIR
13
Pulse sequence involving 180° inversion followed by 90 deg pulse
Inversion Recovery
14
Primary purpose of gadolinium
Shorten the T1 of relaxation time
15
Which term refers to an item that poses no hazard
MR Safe
16
How does an increase in repetition time affect your signal to noise?
Increases SNR
17
Purpose of fat suppression technique like STIR (short tau inversion recovery)
Suppressing from adipose tissue
18
provide better homogeneity of the RF in the area of interest, commonly used for imaging of the knee. what coil?
Paired Saddle Coil
19
Purpose of faraday cage
Shielding against RF interference
20
What is the role of DTI?
Location and orientation of your white matter plaques
21
Combination of several fat suppression
Dixon
22
Artifacts from patient move
Ghosting
23
Factor that directly increases the voxel
Increase Slice thickness
24
Influencing the other t of your t2 relaxation
Spin Spin
25
Which mri technique used to evaluate blood oxygen levels
Bold Imaging
26
What is the key disadvantage of FSE fast spin echo?
Prone to imaging artifacts because its fast
27
Significance of t1 relaxation
Longitudinal Relaxation
28
Suppress fat
STIR
29
Increase Echo Time
Increase t2 weighted contrast
30
z gradient
maxwell
31
Signal to noise relationship
Cleared and more detailed images
32
Dangerous projectiles that contains missile effect
D
33
What is the primary function of gradient coils?
To provide spatial encoding of the MR signals
34
What is the purpose of RF transmitter
Transmits rf energy to excite the nucleus
35
External source of RF
RF Interference
36
What plane is X gradient
Sagittal
37
Freezes motion in cardiac mri
Echo Planar Imaging
38
Flip angle
Increases SNR
39
The contrast agent of gadolinium?
B. manganese?
40
Gold Standard Pulse Sequence
spin echo