Patent · US Active

Rotary anode for an X-ray source

US11469071B2 · kind B2 · utility

0Cited by

9References

15Claims

0Family size

Assignee

KONINIKLIJKE PHILIPS N.V. · NL

Inventors

Rolf Karl Otto Behling · Norderstedt, DE
Christoph Bathe · Hamburg, DE
Wolfgang Chrost · Hamburg, DE

Key dates

Filing date	Dec 11, 2018
Grant date	Oct 11, 2022
Priority date	—
Expiry date	Dec 11, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2235/1295
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The rotatable anode of a rotating anode X-ray source has demanding requirements placed upon it. For example, it may rotate at a frequency as high as 200 Hz. X-ray emission is stimulated by applying a large voltage to the cathode, causing electrons to collide with the focal track. The focal spot generated at the electron impact position may have a peak temperature between 2000° C. and 3000° C. The constant rotation of the rotating anode protects the focal track to some extent, however the average temperature of the focal track immediately following a CT acquisition protocol may still be around 1500° C. Therefore, demanding requirements are placed upon the design of the rotating anode. The present application proposes a multi-layer coating for the target region of a rotating X-ray anode which improves mechanical resilience and thermal resilience, whilst reducing the amount of expensive refractory metals required.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.