MRSO Exam Prep Questions with 100% Verified Answers

MRSO Exam Prep Questions with 100% Verified Answers ACR Guidelines for orbit screening: - "All patients who have a history of orbit trauma by a potential ferromagnetic foreign body for which they sought medical attention are to have their orbits cleared by either plain X-ray orbit films (2 views) or by a radiologist's review and assessment of contiguous cut prior CT or MR images (obtained since the suspected traumatic event) if available."ACR Guidance on MR Safe Practice Pg 6 "The results of such (portable metallic/partially metallic object) testing, as well as the date, time, and name of the tester, and methodology used for that particular device, should be documented in writing. If a device has not been tested, or if its MR compatibility or safety status is unknown, it should not be permitted unrestricted access to Zone ____." - documented in writing / 3 1 mT = _______________ Gauss - 1/1,000 T (or 10 (-3) T) = 10 G 1 T/m = ______ g/cm - 100 g/cm 1 Tesla = ______________ Gauss - 1 Tesla = 1000 gauss 100 W-min/kg (6000 J/kg) - SED limit for patients with thermal regulation compromise - may suffer physiological stress or tissue damage. 25 min continuous scanning at 4 W/kg (1st Level Controlled) 50 min continuous scanning at 2 W/kg (Normal Mode) 240 W-min/kg (14440 J/kg)* - Research shows that this level will produce a temperature rise to 430 C (1090 F) above which patient with normal thermal regulation may suffer tissue damage 1 Hr continuous scanning at 4 W/kg (1st Level Controlled) 2 Hr continuous scanning at 2 W/kg (Normal Mode) 3 types of metals - Austinitic, Martenitic, Ferritic 5 G = ___ mT - 5 G = 0.5 mT A fixed difference in a magnetic field across space - Spatial Gradient ACR - MRI Safety during pregnancy - Can be accepted at any stage of pregnancy. Level 2-designated attending radiologist to confer with ordering physician and determine that the risk-vs-benefit ratio to the patient warrants the study ACR states informed consent in pregnant patients is / is not required - is not required. American Board of Magnetic Resonance Safety ABMRS provides MR Safety Credentialing for: - MR Medical Director (MRMD) MR Safety Officers (MRSO) MR Safety Experts (MRSE) An item that poses no known hazards resulting from exposure to any MR environment - MR Safe An item which poses unacceptable risks to the patient, medical staff or other persons within the MR environment - MR Unsafe An item with demonstrated safety in the MR environment within defined conditions - MR Conditional Any area 5 gauss or higher is zone ________ and must have _________ access - 4 - restricted access Any metallic object will never be labeled as - MRI Safe B1 is - RF Power Big Gradients allow smaller.. - FOV, Shorter echo times, thinner slices Biologic effects of Static magnetic field: - Vertigo, Metallic taste, Magnetophosphenes, Magnetohydromagnetic effect, EKG perturbances, nystagmus Bo - Static magnetic field direction Classifications of Personnel: - MR Personnel Level 1 Level 2 MR Medical Director MR Safety Officer Non-MR Personnel Clips manufactured 1995 or later for which the manufacturer's product labeling continues to claim MR Conditional labeling may be accepted without further testing. - True