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Apparatus for generating x-rays

一种X射线、背散射电子的技术，应用在X射线管的零部件、X射线管、用于放射诊断的仪器等方向，能够解决增加流体动力轴承机械摩擦损失、加剧阳极劣化等问题，达到有助于预测性维护、好服务合同的效果

Active Publication Date: 2020-01-07
KONINKLIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in view of such problems, in order to maintain the maximum X-ray flux, the power delivered to the anode must be increased, thereby exacerbating the degradation of the anode, or the mechanical friction in the hydrodynamic bearing due to the increase in the required anode rotation speed loss

Method used

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  • Apparatus for generating x-rays
  • Apparatus for generating x-rays
  • Apparatus for generating x-rays

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Experimental program
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Embodiment approach

[0114]The specific implementation method is:

[0115] Use pixelated low electron scattering materials to trap electrons (low Z, e.g. carbon, Be);

[0116] Use a low-Z diaphragm (low backscatter material, coated or bulk);

[0117] use of avalanche detectors (electron multipliers);

[0118] Combination of photon and electron detection. Simultaneous measurement of electron flux and X-ray flux (thin electron-trapping electrode on top of scintillator / photodiode pair). Will allow measurement of tube voltage (the ratio of electron to photon flux depends on tube voltage) and tube current (proportional to the total signal from backscattered electrons);

[0119] Combination of readout electronics for photodiodes with electron trapping electrodes (gain correction, biasing);

[0120] Use electron-transmissive foil (such as diamond foil) to separate the anode space from the camera space (to prevent camera contamination);

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Abstract

The present invention relates to an apparatus (10) for generating X-rays. It is described to produce (210) with at least one power supply (40) a voltage between a cathode (20) and an anode (30). The cathode is positioned relative to the anode, and the cathode and anode are operable such that electrons emitted from the cathode interact with the anode with energies corresponding to the voltage, andwherein the electrons interact with the anode at a focal spot to generate X-rays. The at least one power supply provides (220) the cathode with a cathode current. An electron detector (50) is positioned (230) relative to the anode, and a backscatter electron signal is measured (240) from the anode. The measured backscatter electron signal is provided (250) to a processing unit (60). The processingunit determines (260) a cathode current correction and / or a correction to the voltage between the cathode and the anode, wherein the determination comprises utilization of the measured backscatter electron signal and a correlation between anode surface roughness and backscatter electron emission. The cathode current correction and / or the correction to the voltage between the cathode and the anodeis provided (270) to the at least one power supply.

Description

technical field [0001] The invention relates to a device for generating X-rays, a system for imaging an object, and a method for generating X-rays, and to a computer program element and a computer readable medium. The invention also relates to a device and a method for controlling a focused electron beam used in generating X-rays. Background technique [0002] The general background of the invention is the generation of X-rays. Deterioration of the anode target is one of the causes of tube aging, especially for computed tomography (CT) tubes, resulting in a decrease in X-ray flux as the tube ages. It is well known that the X-ray output of the tube decreases with use due to surface roughening of the X-ray emitting region of the anode target, which causes self-filtering. Surface roughness and cracks have a considerable effect on the reduction of the X-ray output spectrum (5-20% reduction in flux), for example: Measurement of the x-ray tube anodes' surface profile and its eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05G1/52H05G1/34
CPCH05G1/34H05G1/52A61B6/032A61B6/40A61B6/4021A61B6/405A61B6/42A61B6/4208A61B6/4258A61B6/44A61B6/4429A61B6/4435A61B6/54A61B6/542A61B6/545A61B6/58A61B6/582H01J35/06H01J35/08H01J35/10H01J35/14H05G1/02H05G1/08H05G1/10H05G1/26H05G1/265H05G1/30H05G1/32H05G1/46H05G1/54H01J35/147H01J35/153
Inventor A·K·多卡尼亚R·K·O·贝林
Owner KONINKLIJKE PHILIPS NV