A large field of view ct imaging method with different radii of three source circle trajectories

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

Active Publication Date: 2018-04-13
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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  • A large field of view ct imaging method with different radii of three source circle trajectories
  • A large field of view ct imaging method with different radii of three source circle trajectories
  • A large field of view ct imaging method with different radii of three source circle trajectories

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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 present invention provides a large field of view CT imaging method with three source circular trajectories with different radii, which not only has the characteristics of multi-source CT imaging, but also can expand the imaging field of view under the same equipment, and can reconstruct larger-sized objects to be detected . Specifically, it includes a large field of view scanning mode with different radii of the three source circle trajectories, and a back-projection filtering algorithm that does not require data rearrangement, in which the three groups of fan beams are all truncated, and the initial phase differences of the three ray sources are different; the reconstruction accuracy High and fast. This three-source imaging method can provide an important theoretical basis and technical reference for the 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, in particular to a large field of view CT imaging system in which the radiuses of the circular trajectories of three ray sources are different, and 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 rela...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03
Inventor 陈明夏迪梦李刚蔡宁王丹
Owner SHANDONG UNIV OF SCI & TECH
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