MRI Registry Test #1 Exam Questions and answers ()

MRI Registry Test #1 Exam Questions and answers (202472025 ) Which of the following implants may pose a problem during scanning? a.implantable drug infusion pump s b. cardiac pacemakers/breast tissue expanders c. bone growth stimulators d. all of the above - ✔✔D Which of the following could result from scanning a pt with a cardiac pacemaker? a. changes of programming b. induced current in the lead wire/pt burns c. pacemaker may become dislodged and pulled from pt's chest - ✔✔A and B Which of the following procedures would be acceptable in checking for ferrous qualities of accessory devices? a. Check the weight b. hand -held magnet c. manufacturer label d. take dev ice into room - ✔✔B A ___ reaction to contrast involves respiratory, cardiovascular, cutaneous, and possibly gastrointestinal manifestations? - ✔✔Anaphylactoid Which of the following factors are responsible for inducing a physiologic response to induced voltage? a. orientation of gradient field b. pt's size c. frequency of stimulus d. all of the above - ✔✔D ___ are reported visual sensations, or flashes of light, that result from direct excitation of optic nerve, induced by the gradient magnetic fields. - ✔✔Magnetophosphenes At the present time, what is the FDA recommended safe SAR level to the head? - ✔✔3W/kg Compared with conventional SE sequences, the fast pulse sequences, such as FSE or TSE have ___ RF deposition. - ✔✔Increased Anesthesiologists consider the use of ___ to be a standard practice for monitoring when scanning sedated or anesthetized pts. - ✔✔Pulse Ox After contrast injection, paramagnetic contrast agents affect pt tissue in which of the following ways? - ✔✔Decrease T1 and T2 relaxation times Which of the following contrast agents is an ionic compound? a. Mag b. Prohance c. Omniscan d. No ne of the above - ✔✔D Following the injection of contrast, which of the following pts are most likely to have serious reaction? a. asthma/allergic respiratory disorders b. High BUN levels c. Anemic pts. d. Claustrophobics - ✔✔A Which position best demo nstrates the collateral ligaments of the knee? - ✔✔COR