English to Polish Medical Medical: Instruments

Czy ma ktoś pojęcie, jak się to nazywa po polsku? Chyba chodzi o coś takiego:
https://www.vareximaging.com/replacement-x-ray-tubes

A kontekst z mojego tekstu:
1.1.9 Downtime: means the time during the equipment operating time when the equipment fails to meet its performance specification or to perform diagnostic imaging examinations. Equipment downtime does not include the time necessary for preventive maintenance, safety modifications according to manufacturer’s instructions, Helium refill in case Helium loss is not caused by hard down event, the time when the equipment is not available for maintenance. In regard to CT tubes, downtime includes the tube delivery time, but does not include the time to replace the tube in case it is excluded by the maintenance coverage.