He wasn’t supposed to be in the room. There was a scan in progress when he entered.
Seems to me all they needed was a magnet of equal or greater strength placed opposite of, and perhaps a bit closer to the doorway, to pull intruders away from the MRI room.
His wife told News 12 Long Island in a recorded interview that she was undergoing an MRI on her knee when she asked the technician to get her husband to help her get off the table. She said she called out to him.
Whole thing is heart breaking all around. I feel for the technician who made an honest but very serious mistake. And I’m sure the wife will spend her days regretting asking for help. Just a fucking tragic situation. :/
all they needed was a magnet of equal or greater strength
MRI magnets are electromagnets that are supercooled with liquid helium and take hours to start or stop because of the electrical energy that has to be put in or taken out.
So just having a magnet of equal strengh for idiot defense would be a very significant waste of electricity and helium unfortunately
The dectector and the variable field (that induces the localized measurable changes) stop between scans, but the static magnetic field is kept up.
As long as you keep up the superconductitvity there is basically no electrical loss in the coils. Dialing the magnetic field down would require pulling out the energy, and reinjecting new energy to get the field back up. That’s the slow part, because injecting current quickly would heat the coil above superconductivity, leading to a quench.
I’m not sure how energy is withdrawn in the ordinary shutdown procedure, but I expect it is exchanged into heat and vented to the outside air in some way, rather than reinjected into the grid in a usable form. (The latter would require an inverter to turn the DC back into AC synchronized to the grid, probably would increase complexity by too much). So I suspect it would be wasteful too.
He wasn’t supposed to be in the room. There was a scan in progress when he entered.
Seems to me all they needed was a magnet of equal or greater strength placed opposite of, and perhaps a bit closer to the doorway, to pull intruders away from the MRI room.
Whole thing is heart breaking all around. I feel for the technician who made an honest but very serious mistake. And I’m sure the wife will spend her days regretting asking for help. Just a fucking tragic situation. :/
You mean letting someone in while the machine was in operation?
MRI magnets are electromagnets that are supercooled with liquid helium and take hours to start or stop because of the electrical energy that has to be put in or taken out.
So just having a magnet of equal strengh for idiot defense would be a very significant waste of electricity and helium unfortunately
But it would be funny
You mean they’re in constant operation the whole shift?
Surely dialed way down in between scans?
No, the magnets are just as dangerous when scans aren’t happening. They are always on.
The dectector and the variable field (that induces the localized measurable changes) stop between scans, but the static magnetic field is kept up.
As long as you keep up the superconductitvity there is basically no electrical loss in the coils. Dialing the magnetic field down would require pulling out the energy, and reinjecting new energy to get the field back up. That’s the slow part, because injecting current quickly would heat the coil above superconductivity, leading to a quench.
I’m not sure how energy is withdrawn in the ordinary shutdown procedure, but I expect it is exchanged into heat and vented to the outside air in some way, rather than reinjected into the grid in a usable form. (The latter would require an inverter to turn the DC back into AC synchronized to the grid, probably would increase complexity by too much). So I suspect it would be wasteful too.
Maybe lockable doors
Idk bc some of the articles seem to be contradicting but apparently the door had a lock and the deck opened it