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اختبارات الدكتور فيزياء 👇🏻👊🏻
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
The Nobel Prize in 1952 for discovering magnetic resonance was awarded to:
Anonymous Quiz
14%
A) Hounsfield and Cormack
14%
Lauterbur and Mansfield
69%
Bloch and Purcell
3%
Damadian and Ernst
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Echo-planar imaging (EPI) was developed by:
Anonymous Quiz
16%
Hounsfield
63%
Mansfield
10%
Bloch
10%
Edlestein
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Superconducting magnets can reach field strengths up to:
Anonymous Quiz
16%
3 T
19%
5 T
9%
7 T
56%
12 T
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MRI can produce images in
Anonymous Quiz
9%
axial only
13%
sagittal only
8%
coronal only
69%
any plane
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Echo-planar imaging technique (EPI) can produce images in
Anonymous Quiz
30%
5 m
54%
30 m
2%
1 h
14%
10 s
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
MRI requires a highly homogeneous:
Anonymous Quiz
9%
A) Electric field
7%
B) Gradient field
78%
C) Static magnetic field
7%
D) RF pulse
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The process of improving magnetic field uniformity is called:
Anonymous Quiz
4%
Imaging
78%
shimming
15%
scanning
2%
Encoding
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Passive shimming is considered:
Anonymous Quiz
7%
A) Electrical adjustment
91%
B) Mechanical adjustment
0%
C) Digital adjustment
2%
D) Optical adjustment
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RF coils directly affect:
Anonymous Quiz
5%
A) Room temperature
71%
B) Image quality
18%
C) Magnet weight
7%
D) Patient comfort only
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Surface coils have:
Anonymous Quiz
8%
low signal
54%
high signal
6%
no signal
32%
Uniform signal everywhere