How does a MRI work?

Today i went to my local hospital for an MRI scan, and after being prepared for it, i had a blood line my arm, a water line and a dye line, what i really want to know is:

1. How do they actually work?
2. Why do they warm up tattoos?
3. Why put dye in your body?
4. Why water?
5. And why oh why does it take so bloody long to do the test?
6. And why do you have to keep so still?

 

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To answer your first question http://www.netdoctor.co.uk/health_advice/examinations/mriscan.htm

 

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http://www.howstuffworks.com/mri.htm

 

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thanks both

 

Did you get sedated? I always have to have a couple valium if its going to take longer than 2 minutes...which it always does. LOL

 

I always put a few coins in my rectum.

It tingles.

 

You would get owned if you did that.

 

I went in forgetting to tell them at the open MRI clinic that I had 2 stints put into me awhile back due to clogged arteries. Well they put me into the MRI and when they turned it on, rrripppp, my chest expolded just like in Alien, the movie and out danced these two little "wirey" things!! That was just amazing and I was astonished as were all the people there!!

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Have all of you had an MRI?

 

not me, I never had her.

 

Didn't you read my post?:shrug:

 

I've had 2. My husband has had at least 10. (before sinus and knee surgery). I don't think they even bother with CAT scans anymore.
Thank god for insurance!

 

no i didnt, i was shaking though, i felt like i was going to faint

 

Hmm I've had 3 Xrays but they were work related (clearance for working with foods for clinical purpose, entry into USA); I hear its extremely claustrophobic.

 

I had teeth MRI's ... more than 10 times in past 5 years.

 

yes it is, you cant move, you cant take deep breaths, you have to still totally still.

 

MRI's now come with an OPEN MRI as well, you are put on a sliding table which is moved under the machine and the sides are completely open so that you don't get that claustrophobic feeling that the "closed" MRI have.

 

I do my 3Ds the conventional way; making sections, taking pictures of them, aligning them and reslice them with software, and apply some modification sequence with photoshop to average the histology/aligning errors.

 

My husband only does the open ones because he's too wide at the shoulders to fit comfortably in a closed one. I wanted the open one, but they just gave me some valium and shoved me in the closed one.

 

You'd do anything for drugs wouldn't you?

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