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القناة الأساسية @o735lr
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Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
Quadrature coils produce how much more signal than single loop coils?
Anonymous Quiz
1%
2 time
89%
√2 times
7%
3 time
2%
1 1/2 time
Forwarded from قناتي الخاص
Forwarded from قناتي الخاص
​Without RF shielding, MRI images may contain:
Anonymous Quiz
10%
high resolution
52%
artifacts
36%
higher SNR
2%
no signal
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فيزياء م 3 👇🏻
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What are all things in the universe made of?
Anonymous Quiz
2%
Cells
25%
molecules
70%
atom
2%
protons
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​Atoms are organized in groups called:
Anonymous Quiz
2%
cells
75%
molecules
14%
elements
9%
compounds
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​The particles that make up the nucleus are called:
Anonymous Quiz
16%
electrons
16%
molecules
59%
nucleuons
8%
esotopes
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Atoms with the same number of protons but different numbers of neutrons are called:
Anonymous Quiz
12%
lons
9%
molecules
75%
isotopes
4%
elements
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​The human body consists of approximately how much water?
Anonymous Quiz
5%
50%
5%
60%
6%
70%
85%
80%
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​The simplest nucleus used in MRI is
Anonymous Quiz
0%
Carbon
10%
oxygen
87%
hydrogen
4%
Nitrogen
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The gyromagnetic ratio of hydrogen is:
Anonymous Quiz
1%
21.5 MHz/T
6%
30.1 MHz/T
90%
42.57 MHz/T
2%
60 MHz/T
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فيزياء م 4 👇🏻
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​In most materials such as soft tissue, magnetic moments are:
Anonymous Quiz
3%
​A. Perfectly aligned
79%
​B. Randomly oriented
15%
​C. Parallel only
4%
​​D. Perpendicular only
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​Net magnetization is symbolized by:
Anonymous Quiz
5%
B
88%
M
4%
H
4%
N
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The reason magnetic moments align with or against the field is due to:
Anonymous Quiz
3%
​A. Gravity
24%
​B. Chemical bonding
71%
​C. Quantum mechanics
3%
​D. Heat transfer
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Forwarded from قناتي الخاص
​In MRI, the patient effectively becomes a:
Anonymous Quiz
9%
conductor
77%
magnet
11%
resistor
3%
capacitor