SCREENING IS A PROCESS, NOT ONE QUESTION
Safe preparation includes the person, the device, the object, and the planned exam.
The MRI magnet creates a powerful static field that remains present even when images are not being acquired. MRI also uses changing gradient fields and radiofrequency energy. These can create projectile, movement, malfunction, heating, burn, acoustic-noise, and image-quality risks.
Screening therefore asks more than, “Do you have metal?” It identifies the patient, the ordered examination, relevant history, implants and devices, external items, communication needs, and every condition required for the planned exam.
A previous MRI does not automatically clear a patient for a future examination. Devices, procedures, health history, scanner conditions, and facility requirements can differ.
Screen people and objects before they cross the facility-defined safety boundary.
Follow the site's documented process for patients, companions, staff, equipment, and emergency responders. Use the facility's final check before magnet-room entry.
THE FIVE-PART PATHWAY
Use the same sequence before every MRI exam.
Match the patient, order, anatomy, clinical question, and planned examination.
Use the approved form and verbal review. Ask about procedures, implants, devices, foreign bodies, external items, prior MRI experiences, and recent changes.
Obtain the exact manufacturer, model, relevant components, and current labeling whenever a device or implant is present.
Compare every MR Conditional requirement with the scanner, protocol, position, monitoring, programming, and post-scan plan.
Confirm preparation, approved equipment, hearing protection, communication, and resolution of every concern before entry.
LABELS BEGIN THE DECISION
“Conditional” never means automatically safe.
The item must still be correctly identified and used within its labeling framework.
Every applicable condition must match. Conditions may address field strength, gradients, RF exposure, coil use, scan duration, landmark, position, programming, monitoring, and post-scan checks.
The item must not enter the restricted area defined by labeling and facility policy.
Do not clear an item by appearance, memory, or a prior uneventful scan. Use the approved identification and escalation pathway.
Address clothing, external items, hearing protection, padding, communication, IV or contrast needs, anxiety, pain, mobility, monitoring, and motion.
Fasting, medication, sedation, contrast, and arrival instructions vary by exam and facility. Follow the current exam-specific process.
An implant card can help identify a device, but current manufacturer labeling and the facility's MR safety process determine whether and how the examination may proceed.
THE S.T.O.P. DECISION TOOL
A disciplined path from identification to an allowed scan plan.
Remember: Information gaps are stop signs, not invitations to assume.
SCREENING PRACTICE
Choose the safest next step.
A patient with a pacemaker says another hospital scanned it last year. Is the patient cleared?
No. Treat the previous exam as history, not clearance. Identify the complete implanted system, obtain current labeling, follow the facility's device pathway, and verify every condition for today's scanner and examination.
The patient remembers surgery but the implant model cannot be confirmed. What should happen?
Stop and escalate through the approved identification process. Do not scan based only on appearance, recollection, or the absence of a prior problem.
A patient arrives with a medication patch, jewelry, and an external glucose-management device. Can all three be handled the same way?
No. Follow labeling and facility policy for each item. Confirm safe handling before entry into the controlled MR environment.
A patient reports severe claustrophobia and cannot lie flat comfortably. When should this be addressed?
Before positioning and scanning. Explain communication and noise, assess the patient's ability to complete the exam, and coordinate comfort or medication planning through the appropriate clinical team.
The patient completed an MRI screening form last month. Is a new review unnecessary?
No. Follow the facility's current screening process and ask about changes in procedures, devices, health history, pregnancy status when relevant, and external items.
LESSON 38 COMPLETE
You can organize screening, verify conditions, prepare the patient, and recognize when to stop and escalate.Educational references
This lesson does not clear a patient, implant, device, or object for MRI. Follow current manufacturer labeling, scanner documentation, institutional policy, and the qualified MR safety chain for every clinical decision.