Full automatic inner retrospective CT respiratory gating system

A respiratory gating and retrospective technology, which is applied in the field of medical CT scanning, can solve the problems of increasing the overall price of the system, increasing the complexity of the operation, and increasing the complexity of the system, so as to reduce the complexity of the algorithm, reduce the cost of the system and the complexity of manual operation performance, reducing complexity

Inactive Publication Date: 2015-03-04
SOUTHEAST UNIV
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Problems solved by technology

The disadvantage of external gating is that it increases the complexity of the system, increases the overall price of the system, and limits the promotion of the system
[0004] In order to reduce the investment cost of CT users, Siemens proposed a standardized interface for respiratory gating to improve the compatibility of CT systems with different respiratory detect...

Method used

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  • Full automatic inner retrospective CT respiratory gating system
  • Full automatic inner retrospective CT respiratory gating system
  • Full automatic inner retrospective CT respiratory gating system

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Embodiment Construction

[0029] The above solution will be further described below in conjunction with specific embodiments. It should be understood that these examples are used to illustrate the present invention and not to limit the scope of the present invention. The implementation conditions used in the examples can be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not indicated are usually the conditions in routine experiments.

[0030] Such as figure 1 , is the projection image of the thorax of the experimental mouse obtained by the micro-CT system at different respiratory phases. Observing the image shows that in the CT projection images of different phases, there are large changes in the size of the thoracic region and the height of the diaphragm. The gating waveform used to implement respiratory gating is obtained directly from the projection image. The specific process of implementing respiratory gating is as follows:

[0031] (1)...

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Abstract

The invention discloses a full automatic inner retrospective CT respiratory gating system. The procedures for using the system include automatic positioning of interested regions for respiratory gating signal extraction, respiratory gating signal acquisition and processing, and synchronization and selection of projection images and respiratory waveform. The system is capable of implementing inner retrospective respiratory gating on the basis of an existing small animal micro computed tomographic imaging system, the motion artifact introduced by respiratory during CT scanning for small animals can be reduced, and the image spatial resolution is improved significantly; meanwhile, additional hardware added to an existing CT system is omitted, hardware complexity is lowered, the entire cost of equipment is reduced, and economic cost is saved.

Description

technical field [0001] The invention belongs to the technical field of medical CT scanning, and relates to computer tomography (CT, Computed Tomography) respiratory gating technology, in particular to the method design for realizing CT respiratory gating (Respiratory Gate). Background technique [0002] As a living imaging method, CT imaging has the advantages of high spatial resolution, short imaging time, relatively low cost, and the ability to obtain three-dimensional structural information in living animals. However, when micro-CT is used to image the chest or abdomen of living animals, respiratory movement will produce motion artifacts, resulting in a decrease in the spatial resolution of the image. The usual approach is to use respiratory gating to reduce motion artifacts in reconstructed images. [0003] The current respiratory gating technology is mainly external gating technology, which is characterized in that the collection of respiratory signals of the gating de...

Claims

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Application Information

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IPC IPC(8): A61B6/03
Inventor 罗守华吴华珍顾宁
Owner SOUTHEAST UNIV
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