Emergency Power

Critical imaging rooms (ED CT, trauma CT, cath labs, linacs) typically on hospital emergency power.

Typical tiers

• UPS — seconds-to-minutes bridge for orderly shutdown
• Generator — minutes-to-hours bridge for continued operation
• Dual feed — premium installations have redundant utility feeds

MRI quench during power loss

Magnet stays energized (superconducting), but cryocooler needs power. Extended outage → helium boil-off → cryogen loss if cryocooler down too long.