Full automatic inner retrospective CT respiratory gating system

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...

AI Technical Summary

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 detection (RPM) equipment, so that CT and RPM equipment can work in a loosely coupled manner, and can be used in a certain To a certain extent, the reasonable integration of existing medical resources can be realized, but this method needs to store the respiratory signals output by different RPMs in a prescribed standard format, which increases the complexity of the operation

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