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Dual-energy CT scan image reconstruction method and device

A technology of CT scanning and image reconstruction, which is applied in image enhancement, image generation, image analysis, etc., can solve problems such as redundant scanning, and achieve the effect of improving safety

Active Publication Date: 2019-08-09
NEUSOFT MEDICAL SYST CO LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the present application provides a dual-energy CT scanning image reconstruction method and device to solve the problem of redundant scanning in the prior art

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  • Dual-energy CT scan image reconstruction method and device
  • Dual-energy CT scan image reconstruction method and device
  • Dual-energy CT scan image reconstruction method and device

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Embodiment Construction

[0044] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0045] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The present application provides a dual-energy CT scan image reconstruction method and device comprising: a CT scan of high and low energy periodic change to obtain a projection data intended to scan the length of the scanning target;When the nearest high energy or low energy scan of this position is a non-renovation scan, the scanning angle range of 0 to θ corresponds to the non-castive scan. end And projected data, and scanned from another whole ring, intercept the scan angle range from θ end To θ max The corresponding projection data, after combining the projection data of the non-new circle scan with the intercepted projection data, the reconstruction data of the high energy image or low energy image of the currently reconstructed position, 0 <θ end <θ max The scan energy scanning of another whole ring is the same as the scanning energy of the non-indoor scan and before the non-castive scan.You can rebuild the energy image of all target regions without the scan of a redundant portion, and improve CT scan security.

Description

technical field [0001] The present application relates to the field of CT (Computed Tomography, ie computerized tomography), in particular to a dual-energy CT scan image reconstruction method and device. Background technique [0002] Dual-energy CT scanning uses two different energy X-rays to image the scanned part, and uses the difference in attenuation of X-rays by different substances to reconstruct the composition of the scanned part. [0003] In dual-energy scanning, it is necessary to collect data of different energies, and the data collected under each energy must be able to reconstruct the target image, which requires switching between different energies during the scanning process, while ensuring that the data obtained in each scan meets the reconstruction requirements. necessary condition. [0004] figure 1 is a schematic diagram of the projection data collected in a dual-energy scan, figure 2 Schematic diagram of dual-energy helical scanning. in, figure 2 T...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/00
CPCA61B6/52G06T11/006G06T2211/408G06T2211/436G06T11/005G06T2211/432G06T2207/10081
Inventor 李双学楼珊珊佟丽霞
Owner NEUSOFT MEDICAL SYST CO LTD
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