PAD FOR MRI MAGNET
PAD FOR MRI MAGNET
(OP)
I am designing a pad for a mri magnet that weighs about 10K. Vibration of the magnet will also be an issue, but I do not have any info for the vibration. Has anyone designed something similar to this? Thanks.






RE: PAD FOR MRI MAGNET
You have me wondering if steel rebar is even used in such a pad? if an alternate is used what is it.
pennpoint
RE: PAD FOR MRI MAGNET
RE: PAD FOR MRI MAGNET
RE: PAD FOR MRI MAGNET
I have designed several pads for MRI equipment. If yours weighs only 10k, thats relatively light. The vibration issues are best left to experts. The manufacturer will set acceleration limits for all three dimensions and the proposed site will have to measured for conformance.
Whether your magnet has three support feet or four, the pad design (if its on grade) can be straightforward, but be careful that the top layer of pad reinforcement does not create a problem with the gauss fields of the magnet. Each manufacturer has specific limits on how much ferrous material can be within a certain distance of the magnet isocenter. Be sure to ask for this data.
I usually end up dropping the top of MRI pad elevation about two inches to allow installation of RF shielding around the base. Ask your client to provide the thickness of the shielding.
Also, in my neck of the woods (New Jersey), MRI mfgrs are not willing to fasten the MRI to its supports. I have asked manufacturers if they attach in California (I would think in CA they would be very strict about this) but I never get an answer. This is not a good situation (Who needs a 15k magnet sliding around during an earthquake?) but there is not much that can be done when the arch says "Hey we've been doing it this way for ten years and haven't had a problem with seismic yet".
Let us know how you make out. Good luck with the project.