Scanning motion monitoring method and system based on sickbed motion information and storage medium

Abstract

The invention relates to the technical field of medical imaging, and discloses a scanning motion monitoring method and system based on sickbed motion information and a storage medium. The method comprises the steps: setting a camera for collecting an image of a to-be-detected part of a patient near a scanning aperture, and performing geometric calibration on the camera; acquiring a color image anda depth image of the to-be-detected part in the scanning process; selecting a color image and a depth image obtained by adjacent frames, and performing image registration and feature point matching;and calculating the position and motion vectors of a feature point in a world coordinate system and the motion vector of the to-be-detected part moving along with the sickbed, and comparing the difference value of the position and motion vectors of the feature point and the motion vector of the to-be-detected part with a preset threshold value to be used as a basis for judging whether the to-be-detected part moves or not. According to the invention, the scanning process can be adjusted in time according to a monitoring result, the problems of consistency and integrity of projection data due toautonomous or non-autonomous movement are solved, the image quality is improved, and the method is suitable for various scanning modes such as axial scanning or spiral scanning.

Description

technical field [0001] The invention relates to the technical field of CT images, in particular to a scanning motion monitoring method, system and storage medium based on motion information of a hospital bed. Background technique [0002] The CT medical imaging system has made great progress since its invention in the 1970s, and the scanning speed has changed from a few minutes at the beginning to 0.2 seconds now. The number of detector rows has also changed from single row and double row at the beginning to the current 64 rows, 128 rows, and even 256 rows. The change is not only the upgrade of the system hardware, but also the system's image reconstruction technology has brought about revolutionary changes. Since the initial CT system has only one row of detectors, the X-ray beam is a fan beam, and the reconstruction techniques used are also two-dimensional fan beam reconstruction techniques. Because only one layer can be scanned at a time, the entire scan takes a long ti...

AI Technical Summary

Problems solved by technology

For example, the patent application No. 201510473092.X "a real-time motion monitoring method for CT scanning based on projection images" uses the difference between the mutual information of the current projection and the mutual information of the experience projection to judge whether there is motion, the selection of experience values ​​and the patient's abnormality. Voluntary movement will affect the judgment result

In the patent "Motion Detection Method and Device for Computed Tomography" with application number 201611238467.5, motion is estimated by calculating the centroid deviation of two projections separated by integer multiples of 180 degrees. This method is also not applicable to the case of helical scanning

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