How to Transport an MRI Machine: A Step-by-Step Technical Guide

How to Transport an MRI Machine: A Step-by-Step Technical Guide

Transporting an MRI machine is not a task that a general logistics company should attempt. The superconducting magnet at the center of an MRI system operates at temperatures near absolute zero, contains liquid helium cryogen that evaporates continuously, generates a powerful magnetic field that can disable electronics and attract ferromagnetic objects from across a room, and requires OEM-certified recommissioning before it can be used clinically after relocation. Every step in the process requires specialized knowledge, specialized equipment, and coordination with the OEM's field service team.

This guide explains how MRI machine transport is done correctly, from the initial assessment through the final commissioning sign-off. The steps apply broadly across MRI manufacturers and field strengths, though specific details vary by system.

Step 1: Assess the Magnet and Confirm the Transport Strategy

The first decision in any MRI transport project is how the magnet will be managed during the move. MRI magnets operate in a persistent current mode that maintains the magnetic field indefinitely without ongoing power input. The two primary transport strategies are:

Transport in persistence, where the magnet remains energized and the magnetic field is maintained throughout the move. This strategy preserves the helium cryogen and avoids the cost and time of re-energizing the magnet at the destination. It requires non-magnetic rigging hardware, careful route planning to avoid magnetic field interference sources, and a vehicle that does not introduce ferromagnetic objects into the magnet's field zone.

Transport after a controlled quench, where the magnet is intentionally de-energized by rapidly warming the superconducting coils, releasing the stored helium as gas. A quenched magnet is easier to handle and requires no magnetic safety precautions during transport, but the cost of a helium refill and the time required to re-energize the magnet (which can take several days) add significantly to the project cost and timeline.

The OEM's field service team advises on the preferred strategy for the specific system based on its age, condition, and the transport distance and duration.

Step 2: Engage the OEM's Field Service Team

The OEM's field service team is not optional on an MRI transport project. Their involvement begins in the planning phase and continues through final commissioning. STSI initiates contact with the OEM's field service scheduling team as soon as the project scope is confirmed, because OEM availability is a critical path item. Scheduling a qualified MRI field service engineer and the medical physicists required for recommissioning can take weeks, and a delay in OEM scheduling translates directly to extended clinical downtime.

The OEM confirms the deinstallation procedure for the specific system, provides the transport bracing hardware required to secure internal components during transport, and specifies the environmental conditions (temperature, humidity) that the magnet must be maintained in throughout the move.

Step 3: Conduct Site Assessments at Both Locations

MRI systems were installed in their original locations during facility construction or through pathways that may no longer exist. The site assessment determines whether the extraction path from the magnet room to the building exterior is viable, and if not, what engineering work is required to create a viable path.

STSI's site assessment team documents corridor widths, door frame dimensions, floor load ratings, elevator specifications (if the magnet must travel through an elevator), and any turns along the route. For large bore MRI systems, whose outer dimensions can be 5 to 6 feet in diameter and 6 to 7 feet in length, even minor access constraints require engineering solutions.

At the destination, the site assessment confirms that the magnet room is under construction or complete, that the RF shielding design is approved and either installed or scheduled for installation before the magnet arrives, that the utility connections are in place or scheduled, and that the access path from the building exterior to the magnet room is cleared and dimensionally adequate.

Step 4: Plan and Execute the Extraction

The extraction plan covers everything from the magnet room to the transport vehicle. For persistent magnet transport, the extraction team must use non-magnetic equipment throughout.

Air-bearing skates are the standard tool for moving an MRI magnet within a hospital environment. These devices use compressed air to float the magnet on a thin air cushion, eliminating floor friction and allowing precise control over a large, heavy object in confined spaces. STSI's rigging team is trained in air-bearing system operation for MRI transport.

For lifts that require raising or lowering the magnet, for example, when the magnet room is not at grade level and elevator access is insufficient, STSI uses cranes and rigging systems rated for the magnet's weight and configured with non-magnetic hardware. Every lift is planned with load calculations, rigging hardware rated to the appropriate safety factor, and a formal lift plan reviewed by a qualified rigger.

Door frames, partition walls, and other access obstructions that cannot be navigated are temporarily removed during extraction and reinstalled after the magnet passes through.

Step 5: Load and Secure for Transport

Loading an MRI magnet onto the transport vehicle requires the same precision as extraction. The magnet is positioned in the vehicle's cargo area using air-bearing equipment and secured against movement using custom restraint systems designed for the specific magnet model.

The transport vehicle for an MRI moves is a climate-controlled unit with a pneumatic suspension system. The climate control maintains the temperature within the OEM-specified range for the cryogen system. The pneumatic suspension reduces the vibration transmitted to the magnet from the road surface.

Cryogen monitoring continues throughout transport. The helium level in the cryostat is checked before departure and periodically during the journey. STSI's operations team monitors the transport in real time, with GPS tracking confirming progress and cryogen status updates logged at regular intervals.

For persistent magnet transport, the safety zone around the vehicle must be observed throughout the journey. The route is selected to avoid large ferromagnetic structures, sensitive electronic equipment, and other potential magnetic interference sources.

Step 6: Unload and Position at the Destination

Arrival at the destination is the mirror image of the extraction process. The magnet is unloaded from the vehicle using air-bearing equipment, navigated through the access path to the magnet room, and positioned precisely in the installation location.

Precise positioning matters because the magnet room's RF shielding, utility connections, and the spatial relationship between the magnet and the patient table all depend on the magnet being in the correct location within the room. For high-field systems (3 Tesla and above), the shimming process that follows installation is sensitive to the magnet's position relative to the room's geometry.

Step 7: OEM Commissioning

After the magnet is positioned and the utility connections are made, the OEM's field service team takes over for commissioning. For a quenched magnet, this begins with the helium fill: introducing liquid helium into the cryostat to cool the superconducting coils back to their operating temperature. The magnet is then energized, a process that takes hours to days depending on the system.

For both quenched and persistent transport, the OEM team performs shimming: fine adjustments to the magnetic field uniformity using the magnet's built-in shim coils or passive shim inserts. Shimming is critical for image quality; an unshimmed magnet produces images with artifacts that reduce diagnostic value.

After shimming, the gradient and radio-frequency systems are tested and calibrated. Image quality is verified using standardized test phantoms. The OEM issues a commissioning report confirming clinical readiness when all parameters meet acceptance specifications.

Step 8: Documentation and Handoff

The project closes with a complete documentation package delivered to the client: the site assessment records, the transport strategy documentation and OEM approval, the extraction and loading records, the transport logs (GPS, temperature, cryogen monitoring), the installation records, the OEM commissioning report, and the chain of custody record from origin to destination.

This package is the evidence that the MRI transport was conducted in compliance with applicable regulatory and OEM requirements throughout the project.

Get a quote for your MRI machine transport project from STSI. https://spectransport.com/industries/medical-equipment