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PA1 REVISION Questions And Correct Answers
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PA1 REVISION Questions And Correct AnswersIn which ways an a patient self regulate their temperature when they overheat? -
ANSWER Evaporation, Radiation
Which of the following statements are true when discussing MR safety
Larger patients will heat up most
Smaller patients heat up most
Larger patients are ferromagnetic
Induction only occurs in smaller patients - ANSWER Larger patients will heat up
the most
Which of the following personnel can enter zone 3 and 4 but can't escort and patient
into zone 4 - ANSWER MR personnel level 1
Which of the following describes the total dose of energy that a tissue receives
during an entire exam? - ANSWER Specific energy dose
How many gauss are in 1 Tesla? - ANSWER 10,000
Where is cryogen primarily located? - ANSWER In the MR unit
According to the ACR Manual on MRI safety 2020, what zone is the quench pipe
located OUTSIDE a facility? - ANSWER Zone 3
What type of MR unit uses a coil of wire with a current running through it and a
cryogenic to help produce a strong magnetic field? - ANSWER Superconducting
magnet
A patient begins to sneeze uncontrollably immediately after an injection of
gadolinium contrast? This could be considered what? - ANSWER Allergic reaction
According to the ACR Manual on MR safety 2020, in what zone is the MR unit found
- ANSWER Zone 4
Which of the following is true of non-MR personnel according to the ACR Manual on
MR safety 2020? - ANSWER They must pass an MR safety screening process
before entering zone 3
Which of the following will determine the amount of heating that a patient will
receive? - ANSWER Pulse sequence used, patients overall surface area, patient
mass
After approximately _____ the magnetic field reaches zero - ANSWER 3-5 minutes
How much more heating does a 360 degree RF pulse have than a 180 degree RF
pulse? - ANSWER 4 times more
, A tester magnet should be how strong according to the ACR Manual on MR safety
2020? - ANSWER Equal or greater than 1000 gauss
What is the risk of a non-ferrous pain pump? - ANSWER Lenz's force
Which of the following answers best describes an electrical current when exposed to
electrically conductive material? - ANSWER Faraday's law of induction
The gradient coils are responsible for which of the following? - ANSWER Noise,
peripheral nerve stimulation
The T wave in the cardiac cycle represents what? - ANSWER Heart repolarization
How would gadolinium appear on a T1 weighted image? - ANSWER Bright
Emesis after a contrata media reaction is considered what kind of adverse reaction?
- ANSWER A non-allergic reaction to contrast media
When a patient undergoes an MR exam and starts to perspire, what method is the
body using to regulate the increased temperature? - ANSWER Evaporative cooling
Which of the following are NOT recommended by the ACR Manual on MRI safety
2020? - ANSWER Metal detector
When electrical fields are produced in implants, the process of ___ heating can
result - ANSWER Ohmic
Which of the following can reduce the risk of Lenz's force with implanted devices in
our patient? - ANSWER Advance the patient slowly into the MR unit
A patient will change into a gown in most hospital settings within this zone, according
to the ACR Manual on MRI safety 2020 - ANSWER Zone 2
Cryogen is designed to escape from the MR room through what? - ANSWER
Quench vent
An area that is outside of any MR department and is accessible to the general public
is called what according to the ACR Manual on MR Safety 2020 - ANSWER Zone
1
What is the cryogen used in MRI? - ANSWER Helium
This individual must have an in-depth understanding of the risks associated with the
MRI environment, according to the ACR Manual on MR Safety 2020 - ANSWER
Level 2 personnel
A ligand that attaches to a gadolinium ion in a chain like molecule is called what? -
ANSWER Linear bond
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