10 free, exam-style MRSO (MRSO) practice questions with answers and explanations. No signup required. Work through them below, then take the full free MRSO practice test to study every exam domain.
These 10 free MRSO questions are organized by exam domain, so you can see how each part of the MRSO blueprint is tested. Reveal the answer and explanation under each question.
A ferromagnetic oxygen cylinder is accidentally brought into the MR suite. At which location within the static magnetic field does the GREATEST translational (missile) force act on the cylinder?
Correct answer: B - At the fringe-field boundary, where the spatial gradient (dB/dx) is greatest
During a cardiac MRI at 1.5 T, the technologist notices that the patient's ECG trace shows a markedly elevated T-wave amplitude that was not present on the pre-scan ECG taken outside the MR suite. Which phenomenon MOST likely accounts for this finding?
Correct answer: C - The magnetohydrodynamic (MHD) effect of blood flow through the aorta in the static field
A patient undergoing a high-performance knee MRI reports a mild tingling sensation in their lower leg during the scan. The system is operating in IEC Normal Operating Mode. Which statement BEST characterizes this situation?
Correct answer: B - This is unexpected; Normal Mode limits dB/dt to 80% of the PNS perception threshold and the patient should not be experiencing stimulation under normal conditions
A radiologist requests the same pulse sequence to be run on a 3 T scanner that was previously used on a 1.5 T scanner with a whole-body SAR of 1.0 W/kg. Assuming all other sequence parameters remain identical, what is the APPROXIMATE whole-body SAR at 3 T?
Correct answer: C - 4.0 W/kg - SAR scales with the square of B₀
A patient with an eGFR of 18 mL/min/1.73 m² requires a contrast-enhanced MRI. The ordering physician asks which gadolinium-based contrast agent (GBCA) carries the HIGHEST risk for nephrogenic systemic fibrosis (NSF) and is classified as ACR Group I. Which agent is CORRECTLY identified?
Correct answer: C - Gadodiamide (Omniscan)
A large ferromagnetic floor polisher has become pinned against the bore of the MRI scanner, trapping a patient inside. All physical attempts to remove the object have failed and the patient is becoming increasingly distressed. Which action represents the CORRECT next step?
Correct answer: C - Attempt to slide the patient out axially toward the bore exit opposite to the polisher while the object remains pinned
A surgeon's operative note states that a patient received an implant labeled 'MR Compatible' in 2005. When the MR Safety Officer reviews the implant documentation prior to scheduling the patient's MRI, which conclusion is MOST accurate?
Correct answer: C - 'MR Compatible' is not a recognized ASTM F2503 term; the label provides no reliable safety information and further documentation is required
According to the FDA's 2014 guidance on Significant Risk Investigations of Magnetic Resonance Diagnostic Devices, which of the following static field strengths applied to a neonate aged 3 weeks would trigger classification as a Significant Risk study requiring full IDE oversight?
Correct answer: B - Greater than 4 T
A patient presents for an urgent brain MRI and reports having a cardiac pacemaker implanted 4 years ago. The device documentation confirms it is labeled MR Conditional. The available scanner is a 3 T system. The radiologist approves proceeding. Which additional factor MOST critically determines whether the scan can safely continue?
Correct answer: B - Whether the specific pacemaker's MR Conditional labeling explicitly permits scanning at 3 T, since many devices are labeled for 1.5 T only
Per the ACR Manual on MR Safety 2024, when screening an emergent (non-elective) patient before MRI, what is the MINIMUM personnel requirement for conducting the safety screening?
Correct answer: C - The screening must be performed by a Level 2 MR Personnel individual
Practice hundreds more MRSO questions with instant scoring, weak-area drills, and full exam simulations.