The magnetic property of a nucleus is called:
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3%
magnetic wave
81%
magnetic moment
15%
magnetic charge
1%
magnetic energy
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Thermal motion (heat) causes magnetic moments to be:
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6%
perftly aliynged
83%
randomly oriented
9%
faster
2%
stationary
The ratio of aligned protons increases when:
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2%
Temperature increases
14%
Proton density decreases
0%
Gravity increases
84%
Magnetic field strength increases
The nucleus acting like a magnet is called a:
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39%
magnetic dipole
56%
magnetic field
2%
elctric field
3%
Ion pair
The Nobel Prize in 1952 for discovering NMR was awarded to:
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14%
lautarbur and mansfield
75%
bloch and purcell
8%
damadian and ernst
3%
mansfield and cormack
The unit of magnetic field strength used in MRI is:
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2%
gauss
10%
joule
89%
tesla
0%
watt
Which magnet type cannot be turned off?
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3%
Resistive magnet
22%
Permanent magnet
61%
Superconducting magnet
14%
Electromagnet
Superconductivity means:
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16%
High resistance
77%
Zero electrical resistance
3%
High voltage
5%
No current
The coolant commonly used in superconducting magnets is:
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2%
nitrogen
5%
oxygen
93%
liquid helium
0%
water
The Nobel Prize in 2003 was awarded to:
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5%
bloch and purcel
77%
lauterbur and mansfield
16%
damadian and ernst
2%
roentgen
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Open MRI systems are more suitable for:
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0%
High field imaging
97%
Claustrophobic patients
3%
Fastest scans
0%
Bone density only
The process of improving magnetic field uniformity is called:
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0%
Imaging
93%
shimming
5%
scanning
2%
encoding
The homogeneity of the magnetic field is measured in:
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62%
ppm
15%
hetez
23%
tesla
0%
watts
Passive shimming involves using:
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5%
Electric current
5%
RF pulses
89%
Steel or iron pieces
0%
Gradient coils
A surface coil can "see" to a depth of:
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7%
Double its diameter
9%
Its full diameter
56%
Half of its diameter
28%
One-fourth its diameter
A quadrature coil consists of:
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0%
one coils
71%
two coils
18%
three coils
11%
four coils
Quadrature coils produce how much more signal than single loop coils?
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32%
2 times
25%
1.4 times
28%
three times
15%
half