MRSO-2 Exam Questions with All Correct Answers.docx

MRSO-2 Exam Questions with All Correct A What group issued the ACR white paper MRI safety? a.Food and drug association. b.OSHA c.EPA d.American college of radiology blue ribbon panel on MR safety. - Answer-d. American college of radiology blue ribbon panel on MR safety. This individual must have an in-depth understanding of the risks associated with the MRI environment? 1 personnel 2 personnel -MR personnel patient - Answer-b. level 2 personnel Which of the following statements is true of non-MR personnel? a.They must pass an MR safety screening process before entering zone IV. b.They must pass an MR safety screening process before entering zone III. c.They may enter zone III for any reason but cannot enter zone IV. d.They must understand the MR environment. - Answer-b. They must pass an MR safety screening process before entering zone III. Which of the following are reasons why metal detectors are not recommended in MR implant detection? a.They vary in sensitivity b.They cannot detect small ferromagnetic objects. c.They cannot discriminate an implant with magnetic properties or not. d.All the choices. - Answer-d. All the choices. Which of the following can enter zone III and IV but not escort a patient into these zones? a.MR personnel level 1 b.MR personnel level 2 c.Non-MR personnel d.Patient - Answer-a. MR personnel level 1 Which of the following is considered level 1 MR personnel? a.MR tech aid b.MR tech c.The person being scanned d.A patients family member wanting to sit with the patient. - Answer-a. MR tech aid What organization has produced the terms used in MR labeling (MR safe, conditional ect...) a.ASTM international b.ACR c.OSHA d.EPA - Answer-a. ASTM international A tester magnet should be how strong? a.Equal or greater than 1000 gauss b.Equal or greater than 500 Gauss c.Greater than 3000 gauss d.1.5 Tesla - Answer-a. Equal or greater than 1000 gauss What does the the yellow triangle with mr in the center represent? a.MR conditional b.MR safe c.MR compatible d.MR unsafe - Answer-a. MR conditional Sound level is limited by the international standard IEC to what dba during acquisition? a.60db b.99db c.120db d.200db - Answer-b. 99db The victim in a criminal case is referred to as? a.The plantiff b.The defendent c.The accused d.The victim - Answer-a. The plantiff A tort case results in which of the following if the defendant is found guilty? a.Paying for damages b.Paying a fine to the government c.Serving a sentence d.None - Answer-a. Paying for damages What is a deposition in a court case? a.A testimony of what happened. b.The final verdict in a case. c.The reason why a defendant is on trial. d.The opening words in a court case. - Answer-a. A testimony of what happened. What is defined in the captain of the ship doctrine? a.It defines the fact that there is a person who is responsible for the care of another. b.It does not apply in medicine. c.It states that the technologist is responsible for the care of a patient. - Answer-a. It defines the fact that there is a person who is responsible for the care of another. An MRI tech has heart disease and requires a pacemaker. What does this mean for this tech? a.They are unable to work in the MR environment b.They can go into the MR environment as long as scanning is not taking place. c.They must limit their time in zone IV. d.None of the choices. - Answer-a. They are unable to work in the MR environment What is the ICNIRP occupational workers dose for magnetic flux limit for the head and torso? a.2 T b.8 T c.400mT d.14T - Answer-a. 2 T What is the ICNIRP occupational workers dose magnetic flux limit for the extremities? a.2T b.8T c.400mT d.14T - Answer-b. 8T Which of the following can be used to reduce Lenz's force risks to an object? a.Advance the patient fast into the MR unit. b.Advance the patient slowly in the MR unit. c.Do not scan the patient because this is unsafe. d.Have the patient approach the gantry at a 45 degree angle. - Answer-b. Advance the patient slowly in the MR unit. A deflection of 45 degrees in a tested implant indicates that it deflects at a force equal to what? a.1 gravity force b.2 gravity force c..05 gravity force d..25 gravity force - Answer-a. 1 gravity force A deflection of 90 degrees due to translation force indicates how much force is experienced in the implant? a.1 gravity force b.2 gravity force c.0.5 gravity force ermined - Answer-d. undetermined Magnetophosphenes can be described as what? a.Visually seeing flashing light while moving around the MRI unit. b.Iron in a patient's blood that becomes magnetized. c.When the room lights dim due to the changing magnetic fields. d.Visualizing an elevated T wave on the cardiac cycle - Answer-a. Visually seeing flashing light while moving around the MRI unit. The magnetohydrodynamic effect describes artifacts seen where in the cardiac cycle? a.T wave b.R wave c.QRS complex d.P wave - Answer-a. T wave What is nystagmus? a.Vision loss b.Experiences different scents that are not really there. c.Involuntary movement of the eyes from side to side. d.Involuntary coughing and sneezing. - Answer-c. Involuntary movement of the eyes from side to side. Which of the following are true? I.MRI has been associated with teratogenises. II.MRi can cause an increase in spontaneous abortion. III.MRI promotes female offspring in working MR techs. IV.MRI can cause infertility. - Answer-None What is teratogenesis? a.The development of congenital abnormalities in an embryo or fetus. b.The development of cancers in tissues. c.The process of hormones in a patient changing due to external forces. d.The ability and speed that a wound heals. - Answer-a. The development of congenital abnormalities in an embryo or fetus. The differences in magnetic field strength as you approach the MRI unit is termed what? a.Spatial magnetic gradient. b.RF energy c.Gradient coils d.Gauss line - Answer-a. Spatial magnetic gradient. Translational force is typically the strongest where? a.By the control panel n the MR unit. b.Isocenter c.Along th table d.At every 10cm from isocenter - Answer-a. By the control panel n the MR unit. What is the unit of measurement used to measure the spatial magnetic gradient? a.dB/dx b.dB/dt c.W/kg d.Gauss - Answer-a. dB/dx The spatial magnetic gradient has the most influence on which of the following? a.Translational force b.Peripheral nerve stimulation c.Noise d.Heating - Answer-a. Translational force Active shield is performed how? a.A magnetically conductive material surrounds the MR unit, shapes and contains the magnetic field. b.A coil of wire in the MR unit has a current running through it which produces a magnetic field opposing the B0. c.Bricks of permanent magnets are stacked around the MR unit to contain the fringe field. d.Nothing is used with active shielding. - Answer-b. A coil of wire in the MR unit has a current running through it which produces a magnetic field opposing the B0. Rotational force is strongest where? a.Isocenter b.At the control panel on the MR unit. c.On the table d.It is uniform everywhere - Answer-a. Isocenter How do we calculate the maximal spatial gradient? a.dB/dx *B b.dB/dt *W/kg c.B d.W/kg - Answer-a. dB/dx *B The vectors of the static magnetic field can be produced in what direction? a.Vertical b.Horizontal c.Diagonal d.Vertical or Horizontal - Answer-d. Vertical or Horizontal 4T/m is equal to what? a.400 G/cm b.40 G/cm c.4000 G/cm d.4 G/cm - Answer-a. 400 G/cm Which of the following will be able to handle the most RF heating? a.Neonates b.Adult c.Obese adult d.Elderly patient - Answer-a. Neonates Which of the following statements is true? a.Larger patients will heat up the most. b.Smaller patients will heat up the most c.Larger patients are ferromagnetic d.Induction occurs in smaller patients. - Answer-a. Larger patients will heat up the most. How much more heating does a 360 degree RF pulse have than a 180 degree pulse? a.4 times more b.3 times more c.2 times more d.Equal heating - Answer-a. 4 times more