ARMRIT - Practice test (part 3: MRI Safety) Questions with 100% correct answers | verified

The factor which determines the calculated SAR average is: - Answer-The Patient weight in kilograms The maximum exposure to the head and trunk from the main magnetic field (Bo) is: - Answer-3T The force that can cause a ferromagnetic object such as an oxygen tank to become a projectile in the fringe field is: - Answer-Translational attraction Maximum exposure to Radio-frequency (RF) averaged over the head is: - Answer-No more than 3.2 w/kg Currently, pregnant patients and personnel are excluded from exposure to MRI for the: - Answer-1st trimester Magnetically sensitive objects such as credit cards, magnetic tapes, and discs, and EKG equipment should be kept beyond the ______ gauss line. - Answer-5 gauss line SAR stands for: - Answer-Specific Absorption Rate Hazards associated with large ferromagnetic objects, such as oxygen tanks are contraindicated in MR magnets with field strength of: - Answer-Any Strength An explosive boiling off of liquid helium and/or liquid nitrogen and a sudden loss of superconductivity is known as a: - Answer-Quench Once a patient has been screened, positioned, and the Mri study is underway, the Mri technologist should: - Answer-Visualize/observe and communicate with the patient through the intercom Which form of electromagnetic field in MRI can cause cardiac fibrillation? - Answer-GMFOf the following categories of patients, which one would not present any special safety considerations? - Answer-Patients with previous arthroscopic knee surgery The maximum exposure to the extremities from the main magnetic field (Bo) is: - Answer-5T The best way to lessen the effects of acoustic noise during an MRI Study is to: - Answer-Offer the patient disposable ear plugs Guidelines which exclude pregnant individuals from exposure to MRI are mainly to protect the individual from the: - Answer-Radio Frequency (RF) At rest, the approximate basal metaboli