MRI and rings?
Discussion
Prof Prolapse said:
Pure gold is non-magnetic.
If your wife's ring was 26K you wouldn't have these issues in removing it though.
- the ring is 22k but I understand what your saying - pure gold is very soft.If your wife's ring was 26K you wouldn't have these issues in removing it though.
Anyway an update so if anyone searches they get a full story.
Wife went for the MRI today - she had to remove her bra due to the metal fastner but when she asked about her ring they said 'of course not'.
She had a set of headphones so the staff could talked to her, she also had a hand held 'get me out of here button'.
Not a nice experience (but in no way painful, just unpleasant) but if it finds the problem then it's worth it.
Gareth79 said:
The hospital don't care that you say it's non-ferrous, they just know that if you are wrong it could cause damage to their extremely expensive machine
Fairly sure you could test it using a small pocket magnet to be fair.Can gold get a current induced in it by a magnetic field? Or does that only work for ferrous metals too?
mrmr96 said:
Can gold get a current induced in it by a magnetic field? Or does that only work for ferrous metals too?
Works for any metal, though there's a greater effect in ferromagnetic metals. I don't know if you'd get enough heating from the induced current for it to be a problem.Flibble said:
mrmr96 said:
Can gold get a current induced in it by a magnetic field? Or does that only work for ferrous metals too?
Works for any metal, though there's a greater effect in ferromagnetic metals. I don't know if you'd get enough heating from the induced current for it to be a problem.skeggysteve said:
The senior radiographer that told us that they would never ask for wedding rings to be removed also said that the MRI could heat the ring but the length of time a person would be in the scanner it wouldn't be a problem.
Radiographers told us it just heats stuff and can trash the machine mostly.Interestingly they were studying the effects on the obese when I stopped working at the research institute, apparently it warms their fat up .
I used to take pics near an MRI machine, when I worked as an imaging tech at Manchester Uni Medical School. I took a reading using my exposure meter, and felt the meter being tugged inexorably toward the machine. Result, one perfectly happy Picker International MRI scanner and a totally fked Weston Master V. I used longer lenses after that!
As an aside, I can't have an MRI now, having an implanted spinal cord stimulator. The machine's instructions warn of heating up, shorting out, sparking and even de-implantation - of the £16K implant. I expect that would smart...
Scans, if any, will have to be CT - or good old X-ray.
As an aside, I can't have an MRI now, having an implanted spinal cord stimulator. The machine's instructions warn of heating up, shorting out, sparking and even de-implantation - of the £16K implant. I expect that would smart...
Scans, if any, will have to be CT - or good old X-ray.
davhill said:
As an aside, I can't have an MRI now, having an implanted spinal cord stimulator. The machine's instructions warn of heating up, shorting out, sparking and even de-implantation - of the £16K implant. I expect that would smart...
That ranks along side 'terminate with extreme prejudice' as a ridiculous bit of newspeak; presumably they think people are less perturbed by 'de-implantation' than 'it rips the implant out of your body'?Radiographer here. The problem isn't just whether a metal is magnetic or not. Anything that forms a ring, especially metal, but also parts of the body with a small contact point, will generate heat when placed in an MRI scanner. If you're in a scanner and your calves are touching at a single small point, you can (potentially, on occasion) get skin burns.
Metal can also reduce image quality so it isn't ideal in that respect either.
MRI radiographers have to be pretty strict as there are severe consequences if something goes wrong. e.g. patient has an episode whilst in the scanner and needs oxygen. Nurse runs in behind the radiographer's back with an oxygen cylinder and what happens next? Cylinder fires towards the scanner at 40mph for a 1.5T scanner (80mph for a 3T) and rattles around inside while the patient is lying inside. It's happened with babies before now and it isn't a mistake anyone wants to make. The risk is considered so high that MRI radiographers are supposed to work in pairs at all times.
Forgive them for being a little arsey sometimes, they do it for your own good
Metal can also reduce image quality so it isn't ideal in that respect either.
MRI radiographers have to be pretty strict as there are severe consequences if something goes wrong. e.g. patient has an episode whilst in the scanner and needs oxygen. Nurse runs in behind the radiographer's back with an oxygen cylinder and what happens next? Cylinder fires towards the scanner at 40mph for a 1.5T scanner (80mph for a 3T) and rattles around inside while the patient is lying inside. It's happened with babies before now and it isn't a mistake anyone wants to make. The risk is considered so high that MRI radiographers are supposed to work in pairs at all times.
Forgive them for being a little arsey sometimes, they do it for your own good
Edited by zeduffman on Sunday 14th October 17:19
zeduffman said:
Radiographer here. The problem isn't just whether a metal is magnetic or not. Anything that forms a ring, especially metal, but also parts of the body with a small contact point, will generate heat when placed in an MRI scanner. If you're in a scanner and your calves are touching at a single small point, you can (potentially, on occasion) get skin burns.
Metal can also reduce image quality so it isn't ideal in that respect either.
MRI radiographers have to be pretty strict as there are severe consequences if something goes wrong. e.g. patient has an episode whilst in the scanner and needs oxygen. Nurse runs in behind the radiographer's back with an oxygen cylinder and what happens next? Cylinder fires towards the scanner at 40mph for a 1.5T scanner (80mph for a 3T) and rattles around inside while the patient is lying inside. It's happened with babies before now and it isn't a mistake anyone wants to make. The risk is considered so high that MRI radiographers are supposed to work in pairs at all times.
Forgive them for being a little arsey sometimes, they do it for your own good
Metal can also reduce image quality so it isn't ideal in that respect either.
MRI radiographers have to be pretty strict as there are severe consequences if something goes wrong. e.g. patient has an episode whilst in the scanner and needs oxygen. Nurse runs in behind the radiographer's back with an oxygen cylinder and what happens next? Cylinder fires towards the scanner at 40mph for a 1.5T scanner (80mph for a 3T) and rattles around inside while the patient is lying inside. It's happened with babies before now and it isn't a mistake anyone wants to make. The risk is considered so high that MRI radiographers are supposed to work in pairs at all times.
Forgive them for being a little arsey sometimes, they do it for your own good
Edited by zeduffman on Sunday 14th October 17:19
I'd get that ring removed OP....
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