54. Which of the following is true of helium:
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A. when released, it will rise to the ceiling
B. the vapor is exceedingly cold and looks like a cloud
C. it is odorless and tasteless
D. all of the above
Answer: D
,Patients with Swanz Ganz catheters should not undergo MR procedures because:
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eddy current inductive heating may melt the catheter
Damage to analog watches and magnetic tape strips on credit cards may be
adversely affected by the magnetic field at:
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10.0 gauss
Which of the following is not directly related to acoustic noise within the scanner:
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lower gradient duty cycles
Specific absorption rate limitation problems are more likely to be experienced using
which transmitter coil:
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body
, The most commonly noted reaction to intravenous administration of gadolinium
chelates is:
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headache
Induced voltages or currents secondary to the gradient coil switching during MR
procedures may occur within the patient and / or other electrical conductors in the
bore of the magnet when:
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the gradient amplitude is increasing or decreasing
Ferromagnetic objects must be prohibited from the near vicinity of the magnetic field
because they pose a possible:
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projective hazard
What technique change could be employed to reduce radio frequency power
deposition and circumvent the specific absorption rate limitations?
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A. when released, it will rise to the ceiling
B. the vapor is exceedingly cold and looks like a cloud
C. it is odorless and tasteless
D. all of the above
Answer: D
,Patients with Swanz Ganz catheters should not undergo MR procedures because:
Give this one a try later!
eddy current inductive heating may melt the catheter
Damage to analog watches and magnetic tape strips on credit cards may be
adversely affected by the magnetic field at:
Give this one a try later!
10.0 gauss
Which of the following is not directly related to acoustic noise within the scanner:
Give this one a try later!
lower gradient duty cycles
Specific absorption rate limitation problems are more likely to be experienced using
which transmitter coil:
Give this one a try later!
body
, The most commonly noted reaction to intravenous administration of gadolinium
chelates is:
Give this one a try later!
headache
Induced voltages or currents secondary to the gradient coil switching during MR
procedures may occur within the patient and / or other electrical conductors in the
bore of the magnet when:
Give this one a try later!
the gradient amplitude is increasing or decreasing
Ferromagnetic objects must be prohibited from the near vicinity of the magnetic field
because they pose a possible:
Give this one a try later!
projective hazard
What technique change could be employed to reduce radio frequency power
deposition and circumvent the specific absorption rate limitations?
Give this one a try later!
