4results about "X-ray tube multi-cathode assembly" patented technology

An X-ray therapy method using an X-ray device includes: arranging the cathode device of an X-ray source in an imaging mode to focus electrons onto a focal region of a first size on the anode. In imaging mode, the X-ray source is actuated to emit an X-ray beam toward an X-ray detector to obtain a first X-ray image of a target. Based on a comparison of the first X-ray image and a diagnostic image, the X-ray source or object is adjusted to register the target with its diagnostic image, and the X-ray source is directed toward the target. The cathode device is switched to a power mode to focus electrons onto a second focal region of a second size on the anode, which is larger than the first size. In power mode, the X-ray source is actuated to deliver a therapeutic X-ray dose to the target.

The present disclosure provides a cathode emission device. The cathode emission device may comprise a cathode assembly, including: a first filament, a second filament, and a grid electrode. The grid electrode may be operably connected to the first filament and surrounding the first filament and the second filament. The cathode assembly may be configured to be operably connected to a high-voltage generator and switchable between a first connection configuration and a second connection configuration.

An X-ray therapy method using an X-ray device includes arranging a cathode device of an X-ray source into an imaging mode to focus electrons on a focal area with a first size on an anode. The X-ray source in the imaging mode is actuated to emit an X-ray beam toward an X-ray detector to obtain a first X- ray image of a target. The X-ray source or object is adjusted to register the target with a diagnostic image thereof, and to direct the X-ray source toward the target, based on a comparison of the first X-ray image and diagnostic image. The cathode device is switched into a power mode to focus electrons on a second focal area, having a second size greater than the first size, on the anode. The X-ray source in the power mode is actuated to deliver a therapeutic X-ray dosage to the target.

Deflection electrode arrangement for an X-ray source, wherein the deflection electrode arrangement comprises: a first electrode plate (1) comprising a first connecting section (11) and a plurality of first tooth sections (12), wherein the plurality of first tooth sections (12) are arranged on the first connecting section (1) and spaced apart from one another, and each first tooth section (12) extends from the first connecting section (11) such that the first electrode plate (1) is formed in a comb shape; and a second electrode plate (2) comprising a second connecting section (21) and a plurality of second tooth sections (22), wherein the plurality of second tooth sections (22) are arranged on the second connecting section (21) and spaced apart from each other, and each second tooth section (22) extends from the second connecting section (21) such that the second electrode plate (2) is shaped in a comb form, wherein the first electrode plate (1) and the second electrode plate (2) are arranged such that the first electrode plate (1) and the second electrode plate (2) do not contact each other, and wherein the plurality of first tooth sections (12) and the plurality of second tooth sections (22) are at least partially offset to form multiple electron beam passes (S1, S2, S3, ...), wherein each electron beam pass (S1, S2, S3, ...) is arranged between an adjacent first tooth section (12) and an adjacent second tooth section (22), the X-ray source includes: a plurality of cathode units (5) for generating electron beams from different positions; and an anode (6) for receiving the electron beams from different positions, wherein the first electrode plate (1) and the second electrode plate (2) of the deflection electrode arrangement are arranged between the plurality of cathode units (5) and the anode (6), wherein each cathode unit (5) is arranged such that it is aligned with an electron beam passage (S1, S2, S3, ...) of the deflection electrode arrangement, so that the electron beams generated by the plurality of cathode units (5) can each pass through the corresponding electron beam passages (S1, S2, S3, ...) and reach the anode (6), and wherein potentials can be applied to the first electrode plate (1) and the second electrode plate (2) so that the electron beams are deflected when passing through the respective electron beam passages (S1, S2, S3, ...), and wherein when a high voltage is applied to the anode (6) at exit positions of the respective electron beam passages (S1, S2, S3, ...) focusing electric fields are generated in order to focus the electron beams.