MRSO Exam - Questions and Answers (Complete Solutions)

MRSO Exam - Questions and Answers (Complete Solutions) Which of the following are burn risks associated with an MRI if precautions are not taken? A. ECG B. Pulse oximeter C. Blood pressure D. ECG and pulse oximeter If a patient with a GFR of 15 has an MR ankle scan ordered with and without contrast and the technologist administers the contrast as ordered, who is at fault in the eyes of the court? A. Technologist B. Radiologist C. Ordering physician D. Patient What does gadolinium contrast media do to tissues in a patient? A. Shortens the T1 and PD time of tissues. B. Lengthens the T1 and T2 times of tissues. C. Shortens the T1 and T2 times of tissues. D. Lengthens the T1 times and shortens the T2 times. If evaluating for focal nodular hyperplasia, what type of contrast agent would we most likely want to use? A. Hepatobilliary contrast B. Extracellular contrast C. Blood pool D. Non of the choices. The patient gets nausea immediately after injection and it passes after 30 seconds. This is an example of what? A. Non-allergic reaction B. Allergic reaction C. Anaphylaxis D. Moderate reaction Which of the following is a contrast media with the weakest bond? A. Macrocyclic ionic B. Macrocyclic non-ionic C. Linear ionic D. Linear non-ionic What is the best way to prevent retained gadolinium? A. Limit the dose of gadolinium contrast. B. Only give macrocyclic contrast agents. C. Only give ionic contrast. D. All of the choices. How does gadolinium contrast get into a patient if they never received a contrast media? A. They could have breathed it. B. They could have ingested it. C. They could have had a dose of gadolinium when they were sleeping. D. It is impossible to have gadolinium contrast in a patient unless it has been injected. Which of the following is considered an allergic reaction of gadolinium contrast. A. Headache B. Pain C. Nausea D. Hives Which of the following are part of the time-varying magnetic field used in MRI? A. Radiofrequencies B. Gradient fields C. Static magnetic fields D. Radiofrequencies and gradient fields Which of the following is a radiofrequency that can be used in MRI? A. 3MHz B. 100kHz C. 440 kHz D. 63 MHz Which of the following implants would produce the most heating when exposed to the maximum RF in normal mode and scanned in a 1.5T unit? A. 3mm BB B. 2 cm illiac stent C. 12cm linear cardiac leads D. 25cm neurostimulator lead An implant is located outside the gantry. Is there significant heating in this implant when scanning in normal mode? A. Yes B. No Which of the following pulse sequences will produce the most heating? A. Conventional spin echo B. Conventional gradient echo C. Fast spin echo D. Echo planar image. Which of the following is false about the time-varying gradient field? A. It produces significant heating in the patient. B. Is responsible for peripheral nerve stimulation. C. It produces a changing magnetic field with speeds in the kHz range. D. The slew rate is responsible for the amount of stimulation produced. What is the maximum strength when a gradient coil is activated? A. 40 mT B. 5 mT C. 10 mT D. 90 mT The conventional gradient echo is responsible for significant peripheral nerve stimulation? A. False B. True Which of the following is not a gradient echo? A. Haste B. Grass C. SSFP D. MPGR Which of the following are unique to the static magnetic field? A. It consists of a time-varying magnetic field. B. It is part of the RF system C. It is uniform at isocenter D. It is uniform throughout the entire MR room How many mT are in 100 G? A. 10 mT B. 1000 mT C. 10,000 mT D. 1 mT Implants with leads or wires will have a better chance of heating up at 3.0T than at 1.5T. A. True B. False Which of the following will demonstrate the steepest magnetic spatial gradient? A. Short-bore B. Long-bore C. Depends on other factors. What is the difference between a shielded MR unit and an MR unit that is not shielded? A. It will make the magnetic spatial gradient more uniform. B. The magnetic spatial gradient is more confined to the MR unit. C. It will cause the effects of translational force to be experienced further away from the MR unit. D. It will push the 5 G line closer to the entrance of zone IV. Which of the following will not exaggerate an artifact on an MR brain scan? A. A brain aneurysm clip B. ferrous foreign body in their skull C. non-ferrous earrings. Which of the following can be used to reduce artifacts in the image? A. Decrease receiver bandwidth. B. Use a GRASS pulse sequence. C. Decreasing the image matrix. D. Running a PD sequence rather than a T2. Which of the following organizations help conduct research and produce regulations? A. IEC B. FDA C. ASTM D. All of the choices. Which of the following are conditions that will make an object MR safe? A. Non-metallic B. Non-magnetic C. Non-conductive D. All of the choices Which of the following modes will limit the SAR to the head to 3.2W/kg? A. Normal mode.. B. First Level Controlled Mode. C. Second Level Controlled Mode. D. Normal and First Level Controlled Mode. The Main focus of the ICNIRP in MRI is what? A. Radiation dose. B. Occupational dose. The FDA performs research and testing. A. True B. False Which of the following would most likely be considered a Level 1 MR Personnel? A. MR Technologist B. Radiologist C. Someone who has not received MR Safety training in 1 year. D. Tech aid We would find a patient changing into a gown in what zone? A. Zone I B. Zone II C. Zone III D. Zone IV