Why there is no single price for MRI shielding
One of the most common questions facilities ask is simply, "How much does MRI shielding cost?" The honest answer is that there is no single price, because an MRI shielded room is engineered for a specific scanner in a specific building. Two projects that look similar on paper can differ substantially in cost depending on field strength, room size, structural conditions, and what the enclosure has to accommodate.
That said, the cost is not a mystery. It is driven by a well-understood set of factors, and understanding them lets a facility budget realistically and compare quotes on a like-for-like basis. This article walks through the main price drivers so you know what moves the number, before you fold shielding into your overall project planning and budget.
Field strength and magnet type
The scanner's field strength is one of the largest cost drivers. A 3T or ultra-high-field magnet demands a more rigorous RF enclosure than a 1.5T system, and its larger static fringe field is more likely to require passive magnetic shielding — which, as covered below, is often the single most expensive element of a project.
Magnet type matters too. Superconducting magnets bring cryogen infrastructure and a quench pipe, adding to the scope. Lower-field or permanent-magnet systems, common in some specialized and open designs, tend to have a smaller fringe field and no cryogens, which can reduce or remove the magnetic-shielding and quench-venting portions of the cost. The scanner you choose effectively sets the baseline for what the shielding must do.
RF shielding vs. magnetic shielding
It is important to separate the two shielding systems, because they carry very different costs. RF shielding and magnetic shielding solve different problems: the RF Faraday cage blocks radio-frequency interference and is required on every project, while magnetic shielding contains the static fringe field and is only needed when that field would otherwise extend beyond controlled areas.
When magnetic shielding is required, it usually involves large quantities of carbon steel in the walls, floor, or ceiling — heavy, material-intensive, and often the biggest line item in the whole project. Whether it is needed at all depends on the scanner's field strength, the room size, and the adjacent spaces. This is why two rooms of similar size can differ so much in price: one may need extensive magnetic containment while the other needs none.
Room size and construction method
The size of the shielded room affects cost directly, because more wall, floor, and ceiling area means more shielding material and labor. The construction method matters as well. The choice between a modular or site-built enclosure influences both price and schedule, with modular systems offering predictability and speed and site-built approaches offering flexibility for unusual spaces.
The enclosure also has to include several engineered components that add to the total: the RF shielded door, any shielded observation window, and a penetration panel with filters for every service entering the room. Each of these is a specialized item, and the number and complexity of penetrations — power, data, HVAC, gases, quench — scales with the sophistication of the installation.
Site conditions: new construction vs. retrofit
Where the room goes has a real effect on cost. New construction lets the shielded enclosure and the building be designed together, which is usually the most cost-efficient path. A retrofit into an existing building introduces constraints — limited ceiling height, existing structure, restricted access for materials — that can add complexity and cost.
Structural capacity is a particularly important variable. If magnetic shielding is required, the building must carry significant additional weight, and any structural reinforcement needed to support it becomes part of the project cost. Access for delivering the scanner and shielding materials, the condition of the existing floor, and coordination with other trades all feed into the final number, which is why an accurate quote depends on a real assessment of the site rather than a generic estimate.
Getting an accurate quote
Because so many variables are involved, a meaningful price comes from a quote based on your specific scanner and building — not from a per-square-foot rule of thumb. A credible shielding contractor will ask for the scanner's site-planning drawings, information about the room and adjacent spaces, and details of the building structure before quoting. A price offered without that information is a guess that tends to grow through change orders.
A complete quote should make clear what is included: the RF enclosure, any magnetic shielding, the door and window, penetration panels, and the shielding effectiveness testing that proves the room meets specification. When comparing bids, check that they cover the same scope — a lower number that excludes testing, or assumes no magnetic shielding, is not comparable to one that includes them. Understanding the price drivers is what lets you make that comparison with confidence.
Frequently Asked Questions
How much does MRI shielding cost?
There is no single price, because a shielded room is engineered for a specific scanner and building. Cost is driven mainly by field strength, whether magnetic shielding is required, room size, construction method, and site conditions. A meaningful figure comes from a quote based on your scanner's site-planning drawings and an assessment of your building, not from a per-square-foot rule of thumb.
What is usually the most expensive part of MRI shielding?
When it is required, passive magnetic shielding is often the single largest line item, because it involves large quantities of carbon steel in the walls, floor, or ceiling and may require structural reinforcement to carry the weight. Whether it is needed depends on the scanner's field strength, room size, and adjacent spaces — many projects with lower-field or permanent-magnet systems need none.
Why do MRI shielding quotes vary so much?
Because the projects differ. Two rooms of similar size can differ substantially if one needs magnetic shielding and the other does not, or if one is a retrofit with structural constraints. Quotes can also differ in scope — some exclude testing or assume no magnetic shielding. Always confirm that bids cover the same scope before comparing them.