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Computer program and CT system for segmentation and spectral based metal artifact reduction

A technology of computer system and imaging system, which is applied in the directions of calculation, image analysis, projection reproduction, etc., and can solve the problems of low calculation efficiency of group 3 methods

Active Publication Date: 2021-12-21
CARL ZEISS X RAY MICROSCOPY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, group 3 methods are computationally inefficient because of the large number of iterative processing steps required

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  • Computer program and CT system for segmentation and spectral based metal artifact reduction
  • Computer program and CT system for segmentation and spectral based metal artifact reduction
  • Computer program and CT system for segmentation and spectral based metal artifact reduction

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Embodiment Construction

[0031] The present invention will now be described more fully with reference to the accompanying drawings, in which illustrative embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey to those skilled in the art to convey the scope of the invention.

[0032] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. In addition, it should be understood that when the terms including, comprising, comprising and / or comprising are used in this specification, it specifies the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or Multiple other features, integers, steps, operations, elements, components a...

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Abstract

Application of Segmentation and Spectral Based Metal Artifact Reduction (MAR) Systems and Procedures in Multicolor X-ray CT Systems Using High-Z Metals in Samples That Cause Major Artifacts in the Known X-ray Energy Spectrum Prior Knowledge. Using base material decomposition, the program addresses the problem of reducing or eliminating metal artifacts associated with beam hardening using only a single scan of the sample performed at a selected X‑ray energy. Specifically, generating sets of high-Z projections from the segmented high-Z volume data set based on the thickness of the metal at each projection angle and the x-ray attenuation at each projection angle, normalizing these sets, and A rectified tomographic volume dataset is then created using the low-Z projection and the high-Z projection set.

Description

Background technique [0001] X-ray computed tomography (CT) is a non-destructive technique for examining and analyzing the internal structure of a sample. In general, when X-rays pass through a sample, the X-rays are either absorbed or scattered by the sample. X-rays that are not absorbed or scattered away are transmitted through the sample and are then detected by a detector system. The image formed on the detector system is called an X-ray projection. A tomographic volume dataset is reconstructed from a series of these projections at different angles via standard CT reconstruction algorithms. Tomography systems often present these tomographic volumes in two-dimensional, cross-sectional images or "slices" of tomographic volume data sets. [0002] Some tomography systems utilize polychromatic X-ray beams to generate X-ray projections. Polychromatic X-ray sources include X-ray tubes (laboratory sources) or white synchrotron beams, or accelerator-based sources. The advantage...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T11/00G06T7/10
CPCG06T7/10G06T11/008G06T2207/10081
Inventor 黄志峰托马斯·A·凯斯
Owner CARL ZEISS X RAY MICROSCOPY