Patent ID: 11955307
Assignee: SIEMENS HEALTHINEERS AG
Field: Medical technology (Instruments)
Classification: CPC H | IPC H

Claim 18:
19. A non-transitory computer-readable medium storing computer-readable instructions that, when executed by processing circuitry, cause an electron emitter apparatus to:
ascertain a degree of functionality of at least one field-effect emitter needle on a first ring of field-effect emitter needles, the field effect emitter needles of the first ring forming a first emitter surface on an inner side of the first ring;
compare the degree of functionality of the at least one field-effect emitter needle to a threshold value to obtain a comparison result; and
switch on a second emitter surface in response to determining the degree of functionality of the at least one field-effect emitter needle is below the threshold value based on the comparison result, the second emitter surface being formed on an inner side of a second ring of field-effect emitter needles, and the second emitter surface generating an electron current based on being switched on.