On Tue, 15 Mar 2005 00:08:40 GMT, yourname wrote:

Um, no. RF Heating is a real and measurable phenomenon in MRI imaging.
The "SAR" (specific absorption ratio) calculates just how much

early 80's, former coworker working with mri r+d.
reinstalls items, same outcome. they notice small ball bearings rollin
round the bottom of the cabinet. Weren't ball bearings, they used to be
the stainless screws....had to switch to brass IIRC.

Yup, GE found out brass was a good thing as well.

mid eighties, same place, working on a mri scanning system[which
scientist had faked test results, making project useless] but had
basically an mri for test tubes. wrenches and gas bottles chained to the
wall, leave your wallet at the door. someone decided to measure the bore
diameter without turning off the magnet. one set of 6" 'non magnetic'
calipers extruded through a ~1 inch hole. oops.

Nice I did have to take a flashlight into the bore from time to
time. Batteries are surprisingly magnetic. Er, so I heard, thatis.

proton accelerator I worked at had a whole set of beryillium copper
wrenches, screwedrivers etc that stayed in the magnet chamber...... Get
anywhere near where they was blasting protons and my atm card wouldn't
work for a week....

Nasty stuff, beryllium. We switched to titanium as soon as we could
find a source for titanium crecent wrenches and so on. Pricy stuff...