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Method and apparatus for generating a spectral computer tomography image data set

A technology of image data sets and tomography, applied in computerized tomography scanners, instruments for radiological diagnosis, diagnosis, etc., can solve problems such as unachievable

Pending Publication Date: 2021-03-23
SIEMENS HEATHCARE GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ideally, one would use spectral input datasets that are perfectly separated in the X-ray energy range, but this cannot be achieved with known methods

Method used

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  • Method and apparatus for generating a spectral computer tomography image data set
  • Method and apparatus for generating a spectral computer tomography image data set
  • Method and apparatus for generating a spectral computer tomography image data set

Examples

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Embodiment Construction

[0096] figure 1 A schematic sequence of the method according to the invention is shown for generating a spectral CT X-ray image data set by means of a detection unit 7 and an X-ray source unit 3, the detection unit having at least one photon-counting X-ray detector 71, 72, 73, 74 and the detection unit is designed to convert the detected X-rays 4 into measurement signals that are at least decomposed into an adjustable first energy range EB1 and an adjustable second energy range EB2, the X-ray source unit design To emit X-rays 4 having a first energy spectrum 9 and a second energy spectrum 10 different from the first energy spectrum.

[0097] The method has an adjustment step S1. The first energy range EB1 and the second energy range EB2 are adjusted according to the first energy spectrum 9 and the second energy spectrum 10 by means of the adjustment unit 11 , wherein at least one limit energy GE1 , GE2 which respectively adjusts the respective energy range EB1 , EB2 is adjust...

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Abstract

The invention relates to a method for producing a CT image data set via a detection unit with a photon-counting X-ray detector and an X-ray source unit. The detection unit is configured to convert detected X-rays into measurement signals resolved at least into a first and a second energy range and, and the X-ray source unit is configured to emit X-rays having a first energy spectrum and having a different second energy spectrum. The method includes adapting the first and the second energy ranges, at least one limiting energy of each energy range being adapted; emitting X-rays of the first andsecond energy spectrum; detecting the emitted X-rays, at least one measurement signal being generated as a function of each respective energy range and the respective energy spectrum; producing the spectral CT image data set based upon the generated first and second measurement signals with the assistance of a spectral image processing technique; and outputting the spectral CT image data set.

Description

technical field [0001] The invention relates to a method, a device, a computed tomography system and a computer program for generating a spectral computed tomography X-ray image data set. Background technique [0002] Computed tomography (CT) is an imaging procedure primarily used in medical diagnosis. In CT, a radiation source, for example an x-ray source, and an x-ray detector interacting with it are rotated around an examined object, in particular a patient, in order to record spatial three-dimensional image data. During the rotational movement, measurement data, so-called projection measurement data, are respectively recorded in angular sectors. Projection measurement data is a projection or projections that contain information about the radiation attenuation of the object under examination from different projection angles. From these projection measurement data (also referred to as raw data sets), for example, a two-dimensional cross-sectional image or a three-dimensi...

Claims

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Application Information

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IPC IPC(8): A61B6/03A61B6/00G01J11/00G01T1/36
CPCA61B6/032A61B6/035A61B6/4014A61B6/425A61B6/5258A61B6/481G01J11/00G01T1/36A61B6/54A61B6/5235A61B6/405A61B6/4241A61B6/4021A61B6/482
Inventor T·弗洛赫B·施密特
Owner SIEMENS HEATHCARE GMBH
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