MRSO 180 Questions with Complete Solutions 100% Verified Correct Answers In which ways an a patient self regulate their temperature when they overheat? - Correct Answers 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 - Correct Answers 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 - Correct Answers MR personnel level 1 Which of the following describes the total dose of energy that a tissue receives during an entire exam? - Correct Answers Specific energy dose How many gauss are in 1 Tesla? - Correct Answers 10,000 Where is cryogen primarily located? - Correct Answers In the MR unit According to the ACR Manual on MRI safety 2020, what zone is the quench pipe located OUTSIDE a facility? - Correct Answers 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? - Correct Answers Superconducting magnet A patient begins to sneeze uncontrollably immediately after an injection of gadolinium contrast? This could be considered what? - Correct Answers Allergic reaction According to the ACR Manual on MR safety 2020, in what zone is the MR unit found - Correct Answers Zone 4 1 / 3
Which of the following is true of non-MR personnel according to the ACR Manual on MR safety 2020? - Correct Answers 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? - Correct Answers Pulse sequence used, patients overall surface area, patient mass After approximately _____ the magnetic field reaches zero - Correct Answers 3-5 minutes How much more heating does a 360 degree RF pulse have than a 180 degree RF pulse? - Correct Answers 4 times more A tester magnet should be how strong according to the ACR Manual on MR safety 2020? - Correct Answers Equal or greater than 1000 gauss What is the risk of a non-ferrous pain pump? - Correct Answers Lenz's force Which of the following answers best describes an electrical current when exposed to electrically conductive material? - Correct Answers Faraday's law of induction The gradient coils are responsible for which of the following? - Correct Answers Noise, peripheral nerve stimulation The T wave in the cardiac cycle represents what? - Correct Answers Heart repolarization How would gadolinium appear on a T1 weighted image? - Correct Answers Bright Emesis after a contrata media reaction is considered what kind of adverse reaction? - Correct Answers 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? - Correct Answers Evaporative cooling Which of the following are NOT recommended by the ACR Manual on MRI safety 2020? - Correct Answers Metal detector 2 / 3
When electrical fields are produced in implants, the process of ___ heating can result - Correct Answers Ohmic Which of the following can reduce the risk of Lenz's force with implanted devices in our patient? - Correct Answers 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 - Correct Answers Zone 2 Cryogen is designed to escape from the MR room through what? - Correct Answers 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 - Correct Answers Zone 1 What is the cryogen used in MRI? - Correct Answers 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 - Correct Answers Level 2 personnel A ligand that attaches to a gadolinium ion in a chain like molecule is called what? - Correct Answers Linear bond _____ states that as you run a current through a wire, a magnetic field is produced 90* to that current. It also explains that an electrical current will be produced in a wire placed in a changing magnetic field - Correct Answers Faraday's Law of induction Which of the following is true of all types of stainless steel? - Correct Answers All will cause artifacts in our image A macrocyclic agent refers to a gadolinium ion that is what? - Correct Answers A "caged in" gadolinium ion Which of the following is true of a gadolinium contrast osmolarity? - Correct Answers It is greater than blood
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