An Israel Defense Forces video on November 15 showing a tour of Hamas weaponry found at Al-Shifa hospital shows less weaponry at the scene than in later footage filmed by international news crews, indicating the weaponry may have been moved or placed there prior to news crews arriving.
Yes and no. MRI’s require large amounts of cryogens (LN2, LHe) which would likely be impossible to get during the siege. The magnets likely quenched well before.
Don’t those cryogens only boil off in significant quantities of the machine can’t get power?
Like, isn’t that the whole reason MRI machines are never turned off?
The cryogens boil off at a pretty consistent rate no matter what, but the recovery/recompression systems do require power. So once power is cut, any boil off isn’t recovered.
Superconducting magnets (like in MRIs) can run effectively forever when at the right temperature. Turning them off requires a complex process of draining off that current slowly and carefully so that the magnet isn’t damaged. Hard to do on a normal day, and profoundly harder if there’s no power.