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Detection of x-ray radiation

An X-ray and detector technology, applied in the field of X-ray imaging systems, can solve problems such as difficult signal analysis parameters

Active Publication Date: 2015-03-25
SIEMENS HEALTHCARE GMBH
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Problems solved by technology

[0009] However, it is generally difficult to properly determine these signal analysis parameters in advance so that high-quality projection measurement data can be produced

Method used

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  • Detection of x-ray radiation
  • Detection of x-ray radiation
  • Detection of x-ray radiation

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Embodiment Construction

[0055]figure 1 A computed tomography system 1 is shown with an x-ray source RS which emits x-ray radiation XR which is detected by an x-ray detector 100 situated opposite the x-ray source RS. An examination object O, referred to below as a patient O for short, is arranged between the x-ray source RS and the x-ray detector 100 . The patient O is transmitted by X-ray radiation XR, so that the projection measurement data of the X-ray detector 100 can be used for reconstruction of image data of the examination object. The x-ray detector 100 according to the invention comprises a plurality of detection units 10 which are arranged adjacent to one another in a planar array and which are each connected to a signal evaluation module 30 , 30 ′. The detection unit 10 is hereinafter simply referred to as a pixel. The signal analysis modules 30 , 30 ′ are integrated in an application-specific circuit (ASIC) 20 .

[0056] By way of example only the signal analysis module 30 is discussed b...

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Abstract

An X-ray detector (100) is disclosed, including a detection unit (10) to generate a detection signal for incident X-ray radiation (XR); a signal analysis module (30) to determine a set of count rates (R1, R2, R1', R2') for incident X-ray radiation based upon the detection signal and signal analysis parameters (P1, P2) for X-ray radiation; and a switchover control unit (40) for switching between first signal analysis parameters (P1) and second signal analysis parameters (P2). When an amount of X-ray radiation is incident on the detection module, a first set of count rates (R1, R1') is generated for a first time interval (delta t1) based upon first signal analysis parameters and a second set of count rates (R2, R2') is generated for a second time interval (delta t2) based upon second signal analysis parameters, different from the first signal analysis parameters. An X-ray imaging system including the detector; a method for determining count rates for X-ray radiation; and a method for calibrating signal analysis parameters are also disclosed.

Description

technical field [0001] The invention relates to an X-ray detector for detecting X-ray radiation, with a detection unit generating a detection signal for the X-ray radiation hitting the detection unit, and a signal analysis module based on the detection signal and the detection signal for the X-ray radiation Predetermined signal analysis parameters determine a set of count rates for X-ray radiation hitting the detection unit. Furthermore, the invention relates to a method for determining a count rate for x-ray radiation with such an x-ray detector, and an x-ray imaging system with such an x-ray detector. Background technique [0002] With the aid of modern imaging methods, two-dimensional or three-dimensional image data are usually produced, which can be used for visualization of the imaging examination object and also for other applications. [0003] Usually imaging methods are based on the acquisition of x-ray radiation, in which so-called projection measurement data are p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/164A61B6/03
CPCG01T1/17A61B6/032G01T1/36A61B6/4241G01N23/046H05G1/58
Inventor E.戈德尔S.卡普勒
Owner SIEMENS HEALTHCARE GMBH
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