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X-ray tube arc discharge operation

An X-ray tube, arc discharge technology, used in the field of medical and/or non-medical systems, can solve the problem of data neglect

Active Publication Date: 2015-11-25
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Unfortunately, X-ray tubes are still prone to arcing, and data acquired during arcing is often ignored in reconstruction and replaced with interpolated data from valid points before arcing to valid data points after arcing data
Also, turning off the high voltage and turning it on again has some inherent limitations

Method used

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  • X-ray tube arc discharge operation
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  • X-ray tube arc discharge operation

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Embodiment Construction

[0017] figure 1 An imaging system 100 such as a computed tomography (CT) scanner is illustrated. The imaging system 100 includes a fixed frame 102 and a rotating frame 104 rotatably supported by the fixed frame 102 . The rotating gantry 104 rotates about an examination region 106 about a longitudinal or z-axis. A support 108 , such as a couch, supports a subject within the examination region 106 and may be used to position the subject about the x, y, or z axis before, during, and / or after a scan. A radiation source 110 , such as an X-ray tube, is supported by and rotates with the rotating gantry 104 about the examination region 106 and emits radiation through the examination region 106 .

[0018] A one-dimensional or two-dimensional radiation-sensitive detector array 112 is positioned across the examination region 106 opposite the radiation source 110 and detects radiation passing through the examination region 106 . The detector array 112 generates signals or projection da...

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Abstract

A method includes identifying projection data generated during an x-ray tube arc event, determining x-ray tube voltages for data points of the identified projection data, correcting the identified data points based on the determined x-ray tube voltages for the data points, and reconstructing projection data that includes projection data generated during non x-ray tube arc events and the corrected projection data, and a system includes a projection data processor (116) that corrects projection data corresponding to data acquired during an x-ray tube arc event.

Description

technical field [0001] The following generally relates to X-ray tubes, and in particular to the use of data acquired during X-ray tube arcing (arc) events, and is described with respect to particular applications for computed tomography (CT) scanners. The following also applies to other imaging modalities, such as radiography and / or other imaging modalities with x-ray tubes used in conjunction with radiation sensitive detectors. Additionally, the following applies to medical and / or non-medical systems as well. Background technique [0002] X-ray tube arcing is a condition in which the dielectric impedance of the vacuum gap is destroyed and the voltage and / or current to the X-ray tube cannot be maintained. Output and quality cannot be maintained during X-ray tube arcing and will often result in image artifacts. Designing high power X-ray tubes without arcing has been an extreme challenge. Typically, a compromise is made between increasing the power of the X-ray tube to its...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03G06T5/00G06T11/00
CPCH05G1/265A61B6/032G06F17/00G06T11/005H05G1/54
Inventor L·M·米勒J·U·拉杰瓦德
Owner KONINK PHILIPS ELECTRONICS NV