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Thread started 13 Aug 2014 (Wednesday) 11:09
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Filming near an MRI unit

 
javapop
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Aug 13, 2014 11:09 |  #1

This unit is housed in a trailer, not sure how much space is available; but need advise for filming,

Anyone done this? any tips?

(MRI - Magnetic Resonance Imaging)


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Mark_48
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Aug 13, 2014 11:52 |  #2

Wife had an MRI a while back. No carried in metal what-so-ever was permitted in the room where the MRI was done. First off perhaps check with the folks in charge of the MRI equipment to be sure you're allowed to bring a camera into the immediate area of where you want to shoot.


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GeoffSobering
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Aug 13, 2014 12:13 as a reply to  @ Mark_48's post |  #3

It will be cramped. There's not much room, esp. in the magnet room.
Wide angle lenses will probably be the best option unless you can get a good angle to shoot through a door opening into the next room (which may be necessary for anything involving the magnet).
If you can get access to the trailer before the shoot that would be very helpful in figuring out angles and setups.

You will definitely need to collaborate with the operators to find out what is allowed.
Even with that, I would suggest you take great care anytime you are near the magnet. With modern self-shielded magnets, the force on magnetic objects can increase dramatically over just an inch or two. It can go from a slight tug to ripping the item from your grasp very quickly.


  1. Don't have anything loose on your person. Hold onto anything you bring near the magnet so you can feel any change in pull (ex. don't hang a camera around your neck on a strap).
  2. Move slowly and pay attention to the forces on whatever you have.
Here's an old any somewhat over-dramatic video.
In particular, the force curve they show is for an unshielded magnet; a modern one will have a much steeper rise in the force vs. distance.
http://mrrc.yale.edu/u​sers/GEMRI.aspx (external link)

I spent over 20 years working with high-field magnetic resonance magnets, and 10 years with MRI (including 5 years as a scientist/engineer with GE's MRI division). I've had a couple of friends almost killed when they were between an object and the magnet when something got loose.

Cheers,

Geoff S.

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javapop
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Aug 13, 2014 12:19 |  #4

Hey Geoff, thanks I appreciate it! I am going to meet the technician and take a look tomorrow. I do have a 16-35; so I should be able to work well in the tight space. Hoping the control room has a window I can get shots though. I found some great examples via vimeo. Thanks for the video you linked as well. Better safe... than sorry!


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GeoffSobering
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Aug 13, 2014 15:14 |  #5

javapop wrote in post #17093668 (external link)
Hoping the control room has a window I can get shots though.

The window will likely have a fine copper screen in it, so photos taken through it may not turn out that well.

Good luck!

Cheers,

Geoff S.


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Filming near an MRI unit
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