CT rapid batch scanning and correcting method

A calibration method and batch technology, applied in the direction of material analysis using radiation, etc., can solve the problems of scanning calibration complexity, high cost of CT scanning, etc., to achieve the effect of saving machine time consumption, shortening the required time, and improving detection efficiency

Inactive Publication Date: 2011-04-13
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

In view of the high cost of CT scanning and the complexity of scan correction, how to improve the efficiency of batch part scanning and ensure the quality of reconstructed images is a problem worthy of study

Method used

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  • CT rapid batch scanning and correcting method
  • CT rapid batch scanning and correcting method

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Embodiment Construction

[0026] For a batch of detected parts made of iron, the method of the present invention is applied to perform rapid batch scanning and correction of cone beam CT, and the following steps are performed:

[0027] (1) Randomly select one of the parts to be tested in the same batch;

[0028] (2) Perform CT detection scanning and correction on the part, and obtain detection data and corresponding methods that are instructive for the scanning and correction of other parts. The specific steps and methods are as follows:

[0029] 1) Adopt the golden section iterative search method based on the evaluation of reconstructed images of thin strings to obtain the system installation parameters, mainly including the position of the center beam and the installation angle of the detector;

[0030] 2) According to the basic requirements of CT projection images, that is: in all projection images, X-rays can effectively penetrate the parts, and the exposure saturation is not achieved in the blank ...

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Abstract

The invention discloses a CT fast bulk scan and correction method which comprises the following steps of: randomly selecting one of the parts to be detected in the same batch for CT detecting scan and correction, and obtaining detection data and a corresponding method; setting an updating cycle of data needing to be updated regularly in the detection data and a marker bit; judging whether the scan and correction of other parts in the batch are completed, if not, judging whether the current detection data needs to be updated, if so, updating the data, if not, adopting the current detection data and the corresponding method to carry out scan and correction, and CT reconstruction to the next part in the batch; and returning to judge whether the scan is completed after completion. The method greatly shortens the time needed for scan and correction simultaneously when leading other parts to achieve basically the same correction effect as the detection artifact correction, thus realizing the goals of saving machine-hour consumption and improving detection efficiency.

Description

technical field [0001] The invention relates to a CT fast batch scanning and correction method, which belongs to the technical field of CT. Background technique [0002] CT (Computed Tomography) technology uses rays (usually X-rays) to transmit the detected object, and obtains a set of projection images on the detector, and then cooperates with the corresponding reconstruction algorithm to obtain slice images of the object. CT currently researched and applied can be divided into two categories: two-dimensional CT and three-dimensional CT, which can be subdivided according to different scanning and reconstruction methods. CT technology has the ability to detect the whole object (external and internal), and has been widely used in the fields of medicine and industry. [0003] From the imaging principle of CT system, many factors can affect the quality of CT images, of which artifact is an important aspect. According to the different manifestations of CT slice artifacts, they...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/04
Inventor 黄魁东张定华卜昆程云勇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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