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Grid module, modular scattered-radiation grid, CT detector and CT system

A detector and modular technology, applied in radiation/particle processing, diaphragm for radiation diagnosis, nuclear engineering, etc., can solve problems affecting image quality, etc., and achieve the effect of reducing scattered rays

Active Publication Date: 2014-11-26
SIEMENS HEALTHCARE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One problem with such a modularly constructed scattered radiation grid with a plurality of grid modules arranged next to one another is that artifacts in the projections recorded thereby are formed in the region of the junction of two grid modules, These artifacts negatively affect the image quality of the tomographic image data sets reconstructed from these projections or produce artifacts that are visible in the tomographic display

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  • Grid module, modular scattered-radiation grid, CT detector and CT system
  • Grid module, modular scattered-radiation grid, CT detector and CT system
  • Grid module, modular scattered-radiation grid, CT detector and CT system

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Embodiment Construction

[0037] figure 1 A CT system 1 according to the invention is shown schematically. The CT system 1 has a first radiator / detector system comprising a first X-ray tube 2 and an opposing detector 3, and an angularly offset second X-ray tube on a gantry not shown in detail here. 4 and the second radiator / detector system of the opposite detector 5. The gantry is located in the gantry housing 6 and the radiator / detector system rotates about the system axis 9 during scanning. The patient 7 to be examined is located on a movable examination couch 8 which is moved either continuously or sequentially along a system axis 9 through the scanning field located in the gantry housing 6, wherein the X-rays emitted from the X-ray tube The attenuation is measured by the detector. The operation of the CT system 1 is controlled by means of a control and computing system 10 having a computer program Prg 1 -Prg n , the computer program fetches the control routines required for this at runtime, pe...

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Abstract

A grid module of a scattered-radiation grid is disclosed. The scattered-radiation grid includes a number of grid modules disposed next to one another with a plurality of webs, especially for use in conjunction with a CT detector, a CT detector and a CT system with such a detector. In accordance with an embodiment of the invention, at the joining surfaces of the grid modules, the webs located there, compensating for an excessive reduction in scattered radiation, are embodied lower in their height than the maximum height of the other webs to be found in the grid module.

Description

technical field [0001] The invention relates to a grid module, in particular for a scattered radiation grid used in combination with a CT detector, a scattered radiation grid consisting of a plurality of grid modules with plates (Steg) arranged side by side, a CT detectors and CT systems having such detectors. Background technique [0002] Scattered radiation grids for CT detectors, more precisely grid-shaped scattered radiation collimators, are generally known and are used in almost any CT system currently used in practice. In particular, such scattered radiation grids become important in dual-source CT systems with two angularly offset radiator / detector systems on the gantry, because due to the parallel operation and angularly offset radiator systems, The fraction of scattered radiation is particularly high. [0003] For a modularly constructed radiation-scattering grid, see, for example, document DE 10 2008 030 893 A1. [0004] One problem with such a modularly constru...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/06A61B6/03
CPCG21K1/025
Inventor S.沃思
Owner SIEMENS HEALTHCARE GMBH