X-ray apparatus and a CT device having the same

Patent metadata

Field	Value
Publication number	US-9734979-B2
Application number	US-201414490535-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 18, 2013
Publication date	Aug 15, 2017
Grant date	Aug 15, 2017

Abstract

The present application provides a curved surface array distributed x-ray apparatus, characterized in that, it comprises: a vacuum box which is sealed at its periphery, and the interior thereof is high vacuum; a plurality of electron transmitting units arranged on the wall of the vacuum box in multiple rows along the direction of the axis of the curved surface in the curved surface facing the axis; an anode made of metal and arranged in the axis in the vacuum box which comprises an anode pipe and an anode target surface; a power supply and control system having a high voltage power supply connected to the anode, a filament power supply connected to each of the plurality of the electron transmitting units, a grid-controlled apparatus connected to each of the plurality of electron transmitting units, a control system for controlling each power supply.

First claim

The invention claimed is:

1. An x-ray apparatus, comprising:
a vacuum box which is sealed at its periphery, wherein the interior thereof is in vacuum;
an anode comprising a curved surface and arranged in the vacuum box, wherein a longitudinal axis of the anode extends through a center of the anode and lies in parallel with the curved surface; and
a plurality of electron transmitting units arranged on a wall of the vacuum box in multiple rows parallel to the longitudinal axis of the anode, the plurality of electron transmitting units facing the curved surface of the anode.

2. The x-ray apparatus according to claim 1 , further comprising:
a power supply and control system having:
a high voltage power supply connected to the anode;
a filament power supply connected to each of the plurality of the electron transmitting units;
a grid-controlled apparatus connected to each of the plurality of electron transmitting units; and
a control system for controlling each power supply,

wherein the anode comprises:
an anode pipe made of metal and having a hollow pipe shape;
an anode support arranged on the anode pipe; and
an anode target surface provided on an outer surface of the anode pipe and facing the electron transmitting units.

3. The x-ray apparatus according to claim 2 , wherein the anode target surface is a sloping plane formed by cutting a portion of an excircle of the anode pipe.

4. The x-ray apparatus according to claim 2 , wherein the anode target surface is formed by forming heavy metal material tungsten or tungsten alloy on a sloping plane formed by cutting a portion of an excircle of the anode pipe.

5. The x-ray apparatus according to claim 2 , wherein each of the plurality of electron transmitting units has:
a filament;
a cathode connected to the filament;
an insulated support having an opening and enclosing the filament and the cathode;
filament leads extending from both ends of the filament;
a grid arranged above the cathode opposing the cathode; and
a connecting fastener connected to the insulated support, wherein,
each of the plurality of electron transmitting units is installed on the wall of the vacuum box forming a vacuum seal connection,
the grid comprises:
a grid frame which is made of metal and provided with an opening in the center;
a grid mesh which is made of metal and fixed at a position of the opening of the grid frame; and
a grid lead, extending from the grid frame,

the filament leads connected to the filament power supply and the grid lead connected to the grid-control apparatus extend to the outside of the plurality of electron transmitting units through the insulated support, and
a surface of the grid faces the axis of the anode.

6. The x-ray apparatus according to claim 5 , wherein the connecting fastener is connected to an outer edge of a lower end of the insulated support, and a cathode end of each of the plurality of electron transmitting units is located inside the vacuum box while a lead end of each of the plurality of electron transmitting units is located outside the vacuum box.

7. The x-ray apparatus according to claim 5 , wherein the connecting fastener is connected to an upper end of the insulated support and the plurality of electron transmitting units is located outside the vacuum box.

8. The x-ray apparatus according to claim 5 , further comprising:
a high voltage power supply connecting means connecting the anode to a cable of the high voltage power supply and installed to a side wall of the vacuum box at an end adjacent to the anode;
a filament power supply connecting means for connecting the filament to the filament power supply;
a connecting means of grid-controlled apparatus for connecting the grid of the electron transmitting unit to the grid-controlled apparatus;
a vacuum power supply included in the power supply and control system; and
a vacuum means installed on a side wall of the vacuum box maintaining high vacuum in the vacuum box utilizing the vacuum power supply.

9. The x-ray apparatus according to claim 2 , further comprising:
a cooling means;
a cooling connection means connected to the cooling means outside the vacuum box and connected to the anode and installed on a side surface of the vacuum box adjacent to the anode; and
a cooling control means included in the power supply and control system for controlling the cooling means.

10. The x-ray apparatus according to claim 1 , wherein the axis of the curved surface is a straight line or segmented straight line.

11. The x-ray apparatus according to claim 1 , wherein the axis is an arc.

12. A computed tomography device, comprising the x-ray apparatus according to claim 1 .

Assignees

• Nuctech Co Ltd
• Univ Tsinghua

Inventors

• Tang Huaping
• Tang Chuanxiang
• Chen Huaibi
• Huang Wenhui
• Zheng Shuxin
• Zhang Huayi
• Liu Yaohong

Classifications

• H01J35/12

  Cooling non-rotary anodes · CPC title

• H01J2235/068

  Multi-cathode assembly · CPC title

• H05G1/10

  Power supply arrangements for feeding the X-ray tube {(supply circuits with converters in general H02M; supply circuits for emitters and amplifiers H04B1/16 - H04B1/1623)} · CPC title

• H01J35/16

  Vessels; Containers; Shields associated therewith · CPC title

• H01J35/06 Primary

  Cathodes · CPC title