MRSO Prep from Rite Advantage Exam with precise detailed solutions

MRSO Prep from Rite Advantage Exam with precise detailed
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solutions


What Law describes most of the interactions between our patients and the changing
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magentic field of MRI? - correct answer✔✔Faraday's Law
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What law determines the amount of electromotive (EMF) force created in an electrical
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circuit when exposed to a magnetic field? - correct answer✔✔Faraday's Law
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What Laws: A change in magnetic field while in the presence of a coil of wire will produce a
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voltage AND the amount of induction is equal to the rate of changing flux and the number
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of coils. - correct answer✔✔Faraday
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Non-moving direction of force produced in all magnetic fields in the direction of north to
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south. - correct answer✔✔Magnetic lines of flux
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What in the patient produces a changing magnetic field inside of the patient/ - correct
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answer✔✔Hydrogen precessing ||




What are magnetophosphenes and what causes them? - correct answer✔✔Flashing lights
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the patient can see when moving through the scanner caused by voltages produced in the
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patient as they're moving through the lines of flux
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What are eddy currents? - correct answer✔✔swirls of currents produced by changing
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magnetic fields inside of the patient via faraday's law
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What direction do eddy currents flow in? - correct answer✔✔depends on the direction of
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the magnetic field
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, WHat is the difference between logical and physical gradients? - correct answer✔✔Physical
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gradients are the X, Y, and Z gradients (they actually, physically exist) and logical gradients
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are the ones that fill the k-space
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The slice selection gradient activates at the same time as the ___. - correct answer✔✔RF
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pulse



The frequency encoding gradient is activated at the same time as the ___. - correct
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answer✔✔TE



What are examples of spin echo sequences? - correct answer✔✔FS, TSE, SSFSE, STIR,
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FLAIR



What are examples of gradient echoes? - correct answer✔✔SPGR, SSFP, FLASH, FIESTA
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What is an example of EPI? - correct answer✔✔DWI
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What type of pulse sequence uses a 90-180 model with the number of pulses predicted by
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the echo train length? - correct answer✔✔spin echo
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What type of pulse sequence does not use a 180 refocusing pulse but utilizes different flip
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angles to achieve the same effect? - correct answer✔✔gradient echo
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What type of pulse sequence utilized a 90 degree RF pulse, followed by rapidly changing the
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phase and frequency to rapidly fill k-space? - correct answer✔✔EPI
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What direction do lines of flux flow in? - correct answer✔✔north to south
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