Exam (elaborations)
MRSO PRACTICE EXAM QUESTIONS AND ANSWERS
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MRSO PRACTICE EXAM QUESTIONS AND ANSWERS ...
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2 reviews
By: jeanniegrotheer • 5 months ago
By: tietjens • 9 months ago
could be organized better, all information runs together! Makes it hard to differentiate
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MRSO PRACTICE EXAM QUESTIONS AND ANSWERS physical effects of STATIC FIELDS - Answer translation rotation lenz physical effects of TIME-VARYING FIELDS - Answer motion noise induced currents (on object/in person) lenz translation rotation everything NOT MR SAFE needs to be behind... - Answer 5 gauss line earth's magnetic fiels - Answer 0.5 gauss 1.5T = ___ gauss - Answer 15,000 3 T = ___ gauss - Answer 30,000 MR device can be considered non-significant risk IF: (list) - Answer static mag field SAR dB/dt sound pressure level ^ are below certain threshold dB/dt - Answer gradient fields rate of change can produce severe discomfort/nerve stimulation limits for# Tesla adults can take - Answer 8T limits for # Tesla a >1month old can take - Answer 4T max unprotected sound level - Answer 140 dB max PROTECTED sound level - Answer 99 dBA biological effects of strong mag fields - Answer vertigo dizziness nausea magnetohydrodynamic effects induced electric currents... (for time-varying....) magnetophosphenes nerve stimulation/tingling hair static (electric charges on skin) are there known fetal effects of strong magnetic fields? - Answer nope magnetohydrodynamic effect - Answer bloodflow changes because blood is flowing inside a strong magnetic field; b/c of ions veering left or right occupational threshold for sound pressure level - Answer for 8hr shift: 90dB Engineering controls - Answer eliminate/reduce exposure to hazard through use of engineered structures/machinery/equipment badge access, 4-zone design, shielding around magnet Administrative controls - Answer eliminate/reduce hazard by modifying/implementing administrative practices visual signs, zone notices, ferrous-free sweeps, MRSO on each shift, floor markings PPE - Answer ex. hearing protection (headsets, earplugs) MAX TORQUE in a scanner is __ - Answer at scanner ISOCENTER MAX TRANSLATIONAL FORCE in a scanner is __ - Answer at scanner BORE ENTRANCE how to read static magnetic field map - Answer move further from bore --> magnetostatic lines are spaced further out higher static magnetic field --> can experience __(more/less)___ torque - Answer MOREThe benefits of buying summaries with Stuvia:
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