4 ms·
What problems exactly? The fringe field of an MRI is only a few meters outside the bore before it drops off to 1 Gauss. Especially with all the shielding around
by SimplyUnknown 7y ago
What problems exactly? The fringe field of an MRI is only a few meters outside the bore before it drops off to 1 Gauss. Especially with all the shielding around the machine there is not really a problem with it with normal use. The power consumption of the MRI machine itself are also pretty modest. To keep the magnet on field and superconducting you'll only need to power the helium pump.
The biggest power consumer in an MRI system is the gradient system, which is only necessary for generating images. These need powerful amplifiers to generate the RF pulses.
- taneq 7y agoMaybe "problems" was the wrong word. We need to take enough precautions with the magnetic field generated by an MRI, which drops to 1Gs in "a few meters". This proposed system generates a field of 30Gs at 22 kilometers distance. That's an unfathomable difference in field strength compared with some of the strongest magnets we use right now.
- SimplyUnknown 7y agoAh okay, yeah I see what you mean. You are definitely right. RIP everyone with a pacemaker or another type of implant within more than 22km of that system. Implants are usually safe up to 5Gauss so that would be beyond 22km, I guess. I looked it up BTW, and the maximum extent of the fringe field for a 1.5T MRI scanner drops to 1Gauss at about 4 meters from isocentre. Fun fact, the field strength of an MRI scanner refers to the strength at isocentre, whereas the maximum field strength generated by a 3T scanner is beyond 11 Tesla.