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Wide-field CT (computed tomography) imaging method with different three-source circular orbit radiuses

A technology with different radii and CT imaging, applied in the field of large field of view CT imaging system, can solve the problem of not considering the situation of data truncation of multi-source CT system

Active Publication Date: 2016-01-27
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0008] The above techniques involve multi-source CT or projection data truncation, but none of them take into account the existence of data truncation in multi-source CT systems, that is, an optimized multi-source CT scanning system - with both multi-source CT imaging The advantages of the same equipment can obtain a larger scanning field of view

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  • Wide-field CT (computed tomography) imaging method with different three-source circular orbit radiuses
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  • Wide-field CT (computed tomography) imaging method with different three-source circular orbit radiuses

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Embodiment Construction

[0024] The present invention mainly provides a large field of view CT imaging method, including a scanning system and a reconstruction algorithm. The goal is to optimize the CT system, improve equipment performance and equipment utilization, and realize scanning and reconstruction of larger-sized objects under the same equipment. The present invention Implementation method: Firstly, the relevant devices involved in the system are given, and then the geometric relationship between each device is determined to illustrate figure 1 How to implement the scanning mode, then give the image reconstruction method, and finally give an implementation example.

[0025] 1. Related devices of the scanning system

[0026] The X-ray CT scanning system can obtain the projection map of the object to be detected, which is the basis of CT image reconstruction. The geometric schematic diagram of the framework of the X-ray CT scanning system for obtaining reconstruction data proposed by the present...

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Abstract

The invention provides a wide-field CT (computed tomography) imaging method with different three-source circular orbit radiuses. The method has the features of multi-source CT imaging, allows an enlarged imaging field under same equipment and enables larger size object to be detected to be rebuilt. The method includes: a wide-field scanning mode with different three-source circular orbit radiuses and a backprojection filtration algorithm with no need for data rearrangement, wherein three fan-beam groups all have truncations, and initial phase differences of three ray sources are different; rebuilding precision is high, and rebuilding speed is high. This method can provide important theoretical basis and technical reference for the research and development of a three-source CT system.

Description

technical field [0001] The invention relates to the technical field of medical and industrial X-ray CT detection and imaging, and in particular relates to a large-field CT imaging system with three ray sources having different circular trajectory radii, wherein the fan beam is truncated. Background technique [0002] Based on the requirements for ray radiation dose, high-resolution imaging of moving objects, and large-scale object imaging, the integration of multiple ray sources and multiple detectors in the system is the development trend of the new generation of medical and industrial CT imaging systems, that is, multi-source CT imaging System. It can break through the limitations of traditional CT time resolution, and has unique technical advantages in imaging dynamic organs such as the heart. It can also use multi-energy CT to not only reconstruct the average attenuation coefficient under different high and low energy spectra, but also to reconstruct The relative electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
Inventor 陈明李刚
Owner SHANDONG UNIV OF SCI & TECH
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