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Linear scanning CT system and image reconstructing method

A linear scanning and image reconstruction technology, applied in the field of CT scanning, can solve problems such as the difficulty of having CT equipment, the difficulty of simplifying the structure of the CT system, and the complexity of manufacturing slip rings.

Active Publication Date: 2015-07-29
CHONGQING UNIV
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  • Application Information

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Problems solved by technology

However, the slip ring is complicated to manufacture, and it is difficult to simplify the structure of the CT system
Therefore, modern medical CT systems are expensive and have high requirements for use. Only large medical institutions in developed or developing countries can equip them, but it is difficult for many developing countries and remote areas to obtain CT equipment that is urgently needed.

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  • Linear scanning CT system and image reconstructing method
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  • Linear scanning CT system and image reconstructing method

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Embodiment Construction

[0047] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0048] A kind of linear scan CT system provided by the present invention, its model is as figure 1 As shown, an X-ray source 1 , a detection object 2 , a detector 3 , and a data acquisition system 4 , an image reconstruction display computer system 5 , a control system 6 and a mechanical system 7 .

[0049] The X-ray source emits X-rays that penetrate the detection object and reach the detector. The detector converts the attenuated information of the X-ray into an electrical signal and transmits it to the computer system through the data acquisition system, and displays it after image reconstruction processing by the computer system; the detector It is an area array flat-panel detector; during the scanning process, the X-ray source and the detector move parallel to each other in a straight line around the detection object.

[0050] The inv...

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Abstract

The invention relates to a linear scanning CT system and image reconstructing method and belongs to the technical field of CT scanning. The system comprises an X ray source, a detector, a detection object, a data acquisition system, an image reconstruction displaying computer system, a control system and a mechanical system. The detector is an area array planar detector, in the scanning process, the X ray source and the detector perform opposite parallel linear movements surrounding the detection object. According to the system, a slide ring component and a large-vision multi-layer detection system are omitted; the system has the advantages of simple structure, low cost and mobility / portability; the invention further provides a precision reconstruction algorithm applied to projection data of the system for image construction, the noise immunity is fine, and the computing speed is high.

Description

technical field [0001] The invention belongs to the technical field of CT scanning, and relates to a linear scanning CT system and an image reconstruction method. Background technique [0002] Since its inception in the 1970s, X-ray computed tomography (Computed Tomography, CT for short) has become a key technology in medical diagnostic imaging. The number of CT system configurations and the number of CT scans have been increasing. According to statistics in 2007, there are more than 45,000 sets of CT systems in service worldwide, and the annual number of CT inspections in the United States exceeds 70 million. [0003] The "China CT Market Development Analysis Report" provided by the China Medical Equipment Association shows that in 2010, the number of CT machines in my country was 11,242, and the number of CT machines per million people increased from 5.5 in 2006 to 8.6 in 2010. . Internationally, Japan had 98 CT machines per million population in 2006, and Australia had 5...

Claims

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Application Information

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IPC IPC(8): G06T11/00
Inventor 刘丰林邹永宁薛红
Owner CHONGQING UNIV