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CT image reconstruction method and system

A CT image and image technology, applied in the field of CT image reconstruction methods and systems, can solve the problems of human radiation hazards and time-consuming

Active Publication Date: 2015-10-21
SHENZHEN INST OF ADVANCED TECH
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Problems solved by technology

At present, the commonly used CT scanning and imaging methods take a long time, so there is still a certain degree of radiation hazards to the human body

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  • CT image reconstruction method and system
  • CT image reconstruction method and system

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Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] At present, CT (Computed Tomography) scanning imaging system is mainly divided into the following three parts: scanning system (X-ray tube, detector and scanning frame), computer system, image display and storage, and camera system. Among them, the computer system of the CT scanning imaging system includes two parts, the main computer and the array computer. The main computer controls the work of the entire CT scanning imaging system. Its main functions include: scanning monitoring, and storing the data obtained by CT scanning; correction of CT values; image reconstruction control and post-p...

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Abstract

The invention relates to a CT image reconstruction method and a CT image reconstruction method system. The method comprises obtaining projection data of CT scanning, performing iteration processing according to the projection data to obtain a target image, performing nonnegative processing on the target image to obtain a nonnegative image, performing linear decomposition on the nonnegative image to obtaining a main component image and a secondary component image, performing sparsification processing on the main component image and / or the secondary component image to obtain an optimized sparse solution, and obtaining a CT reconstruction image according to the optimized sparse solution. The CT image reconstruction method and the CT image reconstruction method system can improve the speed of CT image reconstruction, shorten the CT scanning time, and then reduce an X-ray radiation dose on a human body.

Description

technical field [0001] The invention relates to the technical field of medical image processing, in particular to a CT image reconstruction method and system. Background technique [0002] Computed tomography (CT) is an important imaging method to obtain the internal structure information of objects in a non-destructive way. It has many advantages such as high resolution, high sensitivity and multi-level, and is one of the medical imaging diagnostic equipment with the largest installed capacity in my country. It is widely used in various medical clinical examination fields. However, since X-rays are needed in the CT scanning process, the radiation dose of X-rays in CT scanning has drawn more and more attention. The principle of rational use of low dose (As Low As Reasonably Achievable, ALARA) requires that the radiation dose to patients should be reduced as much as possible on the premise of satisfying clinical diagnosis. At present, the commonly used CT scanning and imagin...

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Application Information

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IPC IPC(8): G06T11/00
Inventor 胡战利梁栋郑海荣
Owner SHENZHEN INST OF ADVANCED TECH