McLannahan
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| posted on 9/6/11 at 08:51 PM |
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I didn't find it too claustrophobic at all. Noisy and headset (one of those plastic ones like s plastic stethoscope) didn't drown out the
noise. Closed my eyes through most of it though and tried to have a mini kip!
Honestly you'll be 100% fine
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Triton
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| posted on 9/6/11 at 09:32 PM |
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quote:
Originally posted by matt_gsxr
quote:
Originally posted by MikeRJ
What happens if you need to cough or sneeze during the scan? Presumably it would mess it up and they'd have to start again?
Try not to, but if you do, then you do.
The MRI exam is split into different bits. Initially they run localisers, these are so that they can look at the relevant bits, so those images are
pretty quick and don't need to be high quality.
If you move during a scan then it might pick up some image "artefacts", its no different to when you take photos with a camera, some
pictures are good and some are not. If the images are not good then they will reacquire, but they don't have to start again, only need to
collect the ones that got messed up. Most images will require about 3minutes. Often images are collected as a stack of 2D slices, and in that case
motion might only mess up one image, or sometimes all of them.
It is totally non-invasive (no x-rays, nothing dangerous) so if they have to collect images more than once then its only annoying for you and for
whoever does their scheduling, but they plan for this stuff and you guys are going to be very easy customers compared to some folk (very old, or
non-english speakers, or people who can't lie flat, for example).
Its an ongoing area of research to make scanners quieter, more open (newer scanners are shorter with a wider hole down the middle), and less sensitive
to motion. But at the moment that is what you get. The alternatives are a decent dose of radiation, or a sharp knife, so I know which I would
prefer.
Matt
Wow, learn something new every day...Now why can't the staff explain it like that
Cheers for that Matt
My Daughter has taken over production of the damn fine Triton race seats and her contact email is emmatrs@live.co.uk.
www.tritonraceseats.com
www.hairyhedgehog.com
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ashg
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| posted on 9/6/11 at 10:03 PM |
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quote:
Originally posted by matt_gsxr
MRI is a piece of cake.
I work with MRI and have probably had between 500 and 1000 scans over the last 20 years. I go in all the time as we are a research site and often
have to set things up (programming new methods, optimising protocols). You can image bottles of water but why not image people when they are so
cheaply available, especially as what mostly we do is cardiac MRI. The whole process is painless and something I like to volunteer for after a big
lunch.
So, if they are looking at your ears it will be head coil. You will lie on a bed and you will lie on the back bit and clamp the front part over your
face. You can see out, they should put a mirror onto it (it allows you to see out, which helps with the confined spaces). If they don't have a
mirror then mention it, some sites are too lazy to bother. I didn't like the confined spaces the first time, but after the 2nd I have been
fine. Be brave, much more space than when lying under the car, you will be fine. They can give you a sedative but that would mean you
couldn't drive home.
Normally you will have headphones or earplugs because the scanners are noisy. But not as loud as an angle grinder.
If they are decent then they will talk to you about how long each scan will take. You need to stay still during the scans, but don't stress
about it. If the radiographers are good you will be comfortable so as long as you don't mess about they will get good images.
The whole thing is totally painless. Avoid wearing metal (underwired bras do an amusing flip trick) and take out any embarrassing piercings before
you arrive. They will do a safety form with you, if you have had metal in your eyes then you will want to provide evidence that it isn't mobile
(otherwise you will get an additional x-ray).
Matt
Who do you work for matt? i spend a lot of time configuring linac's, mri's, ct's to work together. i dont know why hospitals think
its a good idea to have them in the same building as magnetic field compensation between the different machines is a complete bitch.
BTW mri is a walk in the park its ct's and xrays that you want to worry about in terms of radiation and even then most doses are about the same
as a long haul flight.
the simplest way i can describe the thing is that its a big super conductive magnet. all it does is magnetise the hydrogen atoms that are already in
your body (water & Fat mainly) to produce an image.
[Edited on 9/6/2011 by ashg]
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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matt_gsxr
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| posted on 9/6/11 at 10:34 PM |
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quote:
Originally posted by ashg
Who do you work for matt? i spend a lot of time configuring linac's, mri's, ct's to work together. i dont know why hospitals think
its a good idea to have them in the same building as magnetic field compensation between the different machines is a complete bitch.
BTW mri is a walk in the park its ct's and xrays that you want to worry about in terms of radiation and even then most doses are about the same
as a long haul flight.
the simplest way i can describe the thing is that its a big super conductive magnet. all it does is magnetise the hydrogen atoms that are already in
your body (water & Fat mainly) to produce an image.
[Edited on 9/6/2011 by ashg]
Univ Oxford, I am a cardiac MRI guy these days, mostly programming scanners when I am lucky, organising when I am not. Good fun stuff.
The technology is cool but not easy to explain!
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Simon
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| posted on 9/6/11 at 11:06 PM |
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Funnily enough, I actually quite like the noise the MRI scanners make - perhaps a cd will be available
Just about fell asleep during mine, and they hauled me out. Almost disappointed
ATB
Simon
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van cleef
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| posted on 10/6/11 at 04:54 AM |
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I also went for a MRI due to Tinnatus.
I was so up in the air the night before that i could'nt sleep, went into the machine and was fighting hard not to nod off as it's nothing
to worry about.
it was around five year's since i had mine as i was getting scanned to see if i had nerve end damage which they thought was causing my Tinatus.
My result's came back incunclusive.I have 30% hearing loss in my left ear along with the ringing.
At the time i was diagnosed only in my 20's working in construction thinking that when i was young not wearing ear protection would'nt
affect me and my advise is alway's wear at least ear plug's when using anything noisy.
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MikeRJ
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| posted on 10/6/11 at 07:31 AM |
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quote:
Originally posted by graememk
i have another one next week. this is the noise you can hear.
http://www.youtube.com/watch?v=2CWpZKuy-NE&feature=related
Wow, that's an impressively large and heavy bit of equipment rotating very quickly inches from the patient! I don't think an MRI scanner
has moving parts though does it?
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matt_gsxr
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| posted on 10/6/11 at 07:46 AM |
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quote:
Originally posted by MikeRJ
quote:
Originally posted by graememk
i have another one next week. this is the noise you can hear.
http://www.youtube.com/watch?v=2CWpZKuy-NE&feature=related
Wow, that's an impressively large and heavy bit of equipment rotating very quickly inches from the patient! I don't think an MRI scanner
has moving parts though does it?
That is a CT scanner (basically it does an X-ray from loads of different angles around, hence the spinning) and then puts that into a massive computer
to get a nice 3D scan.
With the covers on you wouldn't worry about the spinning, just like the propshaft next to your legs!
CT has benefited from big improvements in speed and image quality over the last few 10years, and great technology, excellent for loads of things but
not as good as MRI for "soft-tissue contrast" (that is the squidgy stuff like brains, livers, hearts, joints etc.). Some x-ray dose from
CT, but not a major risk if you only have a small number. You wouldn't go in for fun (like you can with MRI) but most of us don't go to
hospital for a laugh.
Matt
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James
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| posted on 10/6/11 at 08:07 AM |
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I had one on my knee after a snowboarding accident.
Had been warned about the noise by a colleague so was expecting something medieval.
Lay down, stuck my leg in the hole and I.... fell asleep! 20 minutes or so later in came the Dr and I woke up. Easy! And a nice nap too. So it
really can't be that loud. Dont think I had headphones or anything either.
Cheers,
James
------------------------------------------------------------------------------------------------------------
"The fight is won or lost far away from witnesses, behind the lines, in the gym and out there on the road, long before I dance under those lights."
- Muhammad Ali
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antimony
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| posted on 10/6/11 at 10:11 AM |
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I was a volunteer for a tinnitus research project and had 3 MRI scan, each lasting about 45 minutes (normal ones don't take that long). I
struggled to stay awake, which was unfortunate as I was supposed to be watching images to see my brains reaction to images and sounds.
I'm also an NHS audiologist so hopefully know a little bit about tinnitus
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02GF74
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| posted on 10/6/11 at 12:10 PM |
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quote:
Originally posted by bigrich
I just thought it was wax and a quick swill out with a syringe would sort it, how wrong was i. i'm sure the cause will be found soon enough.
Rich
Remember when you were under the car trying to fit the speedo sensor and that little M6 spring washer went missing ..........
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bigrich
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| posted on 10/6/11 at 03:20 PM |
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quote:
Originally posted by 02GF74
quote:
Originally posted by bigrich
I just thought it was wax and a quick swill out with a syringe would sort it, how wrong was i. i'm sure the cause will be found soon enough.
Rich
Remember when you were under the car trying to fit the speedo sensor and that little M6 spring washer went missing ..........
seems a bit extreme to use a giant magnetic device to suck a spring washer out my ear lol.
Well i had my consultation on Wednesday, received my appointment in the post today. Booked in for Monday teatime.
.JPG)
A pint for the gent and a white wine/fruit based drink for the lady. Those are the rules
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