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All MR medical directors must report incidents to which of the following? a. FDA Medwatch Program b. ACR MR safety board c. None of the choices d. All of the choices Correct Answer: a. FDA Medwatch Program Which of the following is not true? a. Screening process for non-MR personnel and MR personnel should be different. b. Screening process for non-MR personnel and MR personnel should be the same. c. Unscreened patient should not enter zone III. d. Zone IV is the responsibility of the a level 2 personnel. Correct Answer: a. Screening process for non-MR personnel and MR personnel should be different. Which of the following are true of non-emergent patient's screening process?
I. They must be screened by 2 individuals II. A verbal or interactive means of screening should be performed. III. Any history of potental ferromagnetic foreign objects must be investigated before entering zone III IV. Must remove metallic objects Correct Answer: I,II,III,IV Which zone is the quench pipe located in when it vents outside the facility? a. Zone I b. Zone II c. Zone III d. Zone IV Correct Answer: c. Zone III All of the following are true except? a. They must be supervised by a level 2 personnel for the entirety of the exam. b. They must be verbally or interactively screened before entering the MR suite. c. They can be screened and accompanied by a level 1 personnel into zone IV. d. They should remove any ferrous objects prior to the MR exam. Correct Answer: c. They can be screened and accompanied by a level 1 personnel into zone IV. What does the green square with green MR in the center mean?
a. Paying for damages b. Serving a sentence c. Paying a fine d. Serving a sentence and/or paying a fine Correct Answer: d. Serving a sentence and/or paying a fine Which of the following are categories of a crime? a. Misdemeanor b. Infraction c. Felony d. All of the choices Correct Answer: d. All of the choices If a standard of care is not delivered to a patient and did not result in injury, it is called what? a. Negligence b. Malpractice c. Felony d. Tort Correct Answer: a. Negligence If a standard of care is not delivered to a patient that resulted in injury to that patient it is called what?
a. Negligence b. Malpractice c. Infraction d. Tort Correct Answer: b. Malpractice A technologist is on their cellphone while a patient is being scanned. The patient is trying to get a hold of the technologist but the tech doesn't notice. This is an example of what? a. Negligence b. Malpractice c. Felony d. Tort Correct Answer: a. Negligence A MR technologist is distracted by another patient and brings a non-MR compatible o tank in the room which severely injures a patient. This is an example of what? a. Negligence b. Malpractice c. Felony d. Tort Correct Answer: b. Malpractice
Which of the following stainless steels is non-ferrous? a. Austenitic b. ferritic c. martensitic d. duplex Correct Answer: a. Austenitic Which of the following are considered biological effects of the static magnetic field? a. Translational forces b. Rotational forces c. Magnetohydrodynamic effect d. all of the choices Correct Answer: c. Magnetohydrodynamic effect How do you determine the total force of a ferrous object that is attracted to the MR unit? a. By the static field strength and the spatial magnetic gradients. b. By the static magnetic field strength c. By the speed of the gradient coils and the static magnetic field. d. Using the SAR Correct Answer: a. By the static field strength and the spatial magnetic gradients.
Typically, where is the area surrounding the MR unit with the highest spatial magnetic gradient field? a. Isocenter b. MR table control panel c. MR table d. At the 5 gauss line Correct Answer: b. MR table control panel Which of the following will produce the largest artifact in MRI? a. Ferromagnetic objects b. Paramagnetic objects c. Super paramagnetic objects d. Diamagnetic objects Correct Answer: a. Ferromagnetic objects When performing an MR abdomen scan, which of the following would cause the most artifact in our exam? a. Aortic aneurysm repair with stainless steel mesh b. Lumbar 4-5 fusion with stainless steel. c. Femur rodding with titainium d. Sternal wires with stainless steel. Correct Answer: a. Aortic aneurysm repair with stainless steel mesh
When scanning a patient for a MRI of the lumbar spine with lumbar spine fusion hardware what is the risk. a. Low b. High c. Cannot scan a lumbar spine d. Use a saturation band over the implant. Correct Answer: a. Low A patient has a non-ferrous MR conditional pain pump and as you advance them in very quickly, they start t complain that the pain pump is moving. What would ou do? a. Tell them that the pain pump is safe and that nothing will happen to them. b. Advance the patient into the gantry slowly c. Since the pain pump is non-ferrous, it is not possible for it to move. d. Cancel the patients exam. Correct Answer: b. Advance the patient into the gantry slowly Which of the following is responsible for defining testing methods for the MR safety of implants? a. ASTM b. FDA c. HIPPA d. EPA Correct Answer: a. ASTM
A T1 sagittal image is obtained on a patient's brain and a large metal artifact half the size of the patient's head is seen inside the brain. What should be done to reduce risk to that patient? a. Remove patient very slowly from the MR scanner b. Quickly get the patient out c. Get patient out and perform x-rays d. none of the choices Correct Answer: a. Remove patient very slowly from the MR scanner An object that deflects under MRI testing because of the static field to 30 degrees is considered what? a. safe to scan b. high risk to scan c. MR Unsafe d. depends on the other factors Correct Answer: a. safe to scan A patient is undergoing an MRI and starts to sweat. Which of these methods is the patient using to regulate their increasing heat? a. convection b. evaporation c. conduction
d. none of the choices Correct Answer: a. transmit-receive coil Which of the following can be used to reduce a proximity burn? a. patient barrier from gantry b. unwind loops in wires c. increase TR d. use ECG gating Correct Answer: a. patient barrier from gantry Which of the following are risks associated with a linearly placed pacing wire within a patient? a. Resonant heating b. radiant heating c. loop induction d. near field burning. Correct Answer: a. Resonant heating which of the following will reduce the risk of patient burning in a pacing wire? a. place the pacing wire outside the RF field b. don't scan patient c. place an ice pack on patient's chest d. advance patient into scanner head first
Correct Answer: a. place the pacing wire outside the RF field An obese patient is laying in the MR gantry and has bare skin touching the sides of the bore. What is she at risk of? a. proximity burning b. peripheral nerve stimulation c. missile effect d. magnetophosphenes Correct Answer: a. proximity burning A patient has a medication patch on them with a foil backing. This patient is at risk of what? a. burning b. peripheral nerve stimulation c. magnohydrodynamic effect d. missile effect Correct Answer: a. burning A patient has a removed vagus stimulator with the leads left in and is having a MR knee scan performed with a transmit-receive coil. In terms of patient heating is it low risk? a. Yes b. No c. Yes, only with a heat sink
c. by increasing net magnetism d. All of the choices Correct Answer: a. by producing faster precessional speeds The slew rate influences which of the following? a. the minimal matrix size b. shorter echo times c. the size of the image matrix d. both the minimal TE and the image matrix size Correct Answer: b. shorter echo times Which of the following is true if we increase the image matrix from 256x256 to 512x512. a. we use a weak time-varying gradient magnetic field b. we use a stronger time-varying gradient magnetic field. c. we reduce peripheral nerve stimulation d. we reduce patient heating Correct Answer: b. we use a stronger time-varying gradient magnetic field. Which of the following will produce the least possibility of peripheral nerve stimulation when using the same slew rate? a. 192x192 image matrix b. 80mm field of view c. 320x320 image matrix
d. 120mm field of view Correct Answer: a. 192x192 image matrix Which of the following concerns can be caused by the time-varying gradient magnetic field? a. diaphragm contractions b. anaphylaxis c. difficulty swallowing d. all of the choices Correct Answer: a. diaphragm contractions Which of the following pulse sequences will produce the greatest chance for peripheral nerve stimulation? a. conventional spin echo b. gradient echo c. inverse recovery d. fast spin echo Correct Answer: b. gradient echo Which of the following will produce the greatest chance for peripheral nerve stimulation? a. conventional spin echo b. gradient echo c. EPI
Earplugs can reduce noise when used properly by how much? a. 40-50 decibels b. 10-30 decibels c. 70-90 decibels d. 0-10 decibels Correct Answer: b. 10-30 decibels What is the unit of measure determining how well hearing protection works? a. NRR b. PHR c. HRR d. dt Correct Answer: a. NRR Which of the following will reduce noise the most? a. NRR 33 db b. NRR 25 db c. NRR 0 db d. NRR 10 db Correct Answer: a. NRR 33 db
A patient is having a MR pelvis scan and has a brain stimulator. They are advanced feet first. What risks are associated with this implant when considering the time-varying gradient magnetic field? a. electrical current induction b. none c. Heating of stimulator d. the only risk is associated with the static field Correct Answer: a. electrical current induction A patient begins complaining of peripheral nerve stimulation. What can be done to reduce this patient discomfort? Select the best choice. a. Use spin echo pulse sequences. b. Use an EPI sequences c. Perform a steady-state sequence d. Use a gradient echo Correct Answer: a. Use spin echo pulse sequences. A patient starts twitching during a diffusion weighted image and not during any other. When questioned, they say that they are holding still. What may be happening? a. patient may be experiencing peripheral nerve stimulation. b. patient is definitely lying to you. c. patient has parkinsons disease d. patient has dementia.
