Exam (elaborations)
MRSO STATIC FIELD MODULE 2 QUESTIONS AND ANSWERS
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MRSO STATIC FIELD MODULE 2 QUESTIONS AND ANSWERS
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Name: Score:68 Multiple choice questions
Term 1 of 68
Not all metal is ferromagnetic, but all metal is
higher field vertical systems
central
conductive
constructive
Term 2 of 68
At isocenter, translation force is
zero
0.3t - 2.2t
one
point of maximum db/dx
,Term 3 of 68
Why can reliably diagnostic EKG not be obtained in MRI:
-magnetohydrodynamic induced elevated ST segment
-use of filtering software
-the direction of the external field
-the object's direction of motion
-vertigo
-metallic taste
-magnetophosphenes
-magnetohydrodynamic effet
-ekg perturbations
in area of controlled access.
-Access restricted to screened individuals
-Possible harmful exposure to persons with active implants or devices
Term 4 of 68
False positive FMD detection
-material
-size and shape
-temperature
Moving through the spatial gradient field
-extremely rare
-investigate further
entrance to the bore near the magnet walls
,Term 5 of 68
5 Gauss Line may not be in Zone IV, but is always
an increase in dB/dx and unpredictability
-length (longer=greater)
-shape (elongated>sperical)
-texture (soft/flexible<hard)(leads/wires<plate)
-location in magnet (greatest at isocenter)
the T wave amplitude exceeds that of the R wave that is being used for triggering
T wave can be reduced by filtering software
in area of controlled access.
-Access restricted to screened individuals
-Possible harmful exposure to persons with active implants or devices
Term 6 of 68
Bioeffects associated with RF field
-vertigo
-metallic taste
-magnetophosphenes
-magnetohydrodynamic effet
-ekg perturbations
-SAR
zero
entering Zone III
, Term 7 of 68
Translational / Displacement (missile effect)
-magnetohydrodynamic induced elevated ST segment
-use of filtering software
attractive force on a ferromagnetic object in a spatial gradient magnetic field
-vertigo
-metallic taste
-magnetophosphenes
-magnetohydrodynamic effet
-ekg perturbations
-the direction of the external field
-the object's direction of motion
Term 8 of 68
Where do you obtain a spatial gradient map?
System vendor
Mr technologist
Higher field vertical systems
Ferromagnetic detection systems
Term 9 of 68
Most ferromagnetic items are going to saturate at:
0.15t - 2.2t
0.3T - 2.2T
mr technologist
0.3t - 2.12t
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