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Universal CT axis alignment method

A rotating axis, directly above technology, applied in the field of general CT axis alignment, can solve problems such as positioning points moving out of the field of view

Active Publication Date: 2021-06-25
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Additionally, with small imaging fields of view, a small off-axis distance of the anchor point may cause the anchor point to move out of the field of view when the sample is rotated

Method used

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Embodiment Construction

[0029] The conventional CT parallel method is no longer applicable when the CT rotation angle is limited or the field of view. The imaging field of imaging in the synchronous radiation soft X-ray nanoscopic, the CT process rotation angle is less than 180 °, and in order to improve the counter-axis efficiency, the present invention proposes a universal CT to the axis method, quickly complete the counter axis before the CT.

[0030] In order to make the objects, technical solutions, and advantages of the present invention, the present invention will be further detailed in connection with the accompanying drawings.

[0031] Such as figure 2 The flow chart showing the general CT to the axis method; wherein the method comprises the steps of:

[0032] Image point imaging in three rotation angles;

[0033] According to the imaging geometry, the positioning point moves to the rotation axis;

[0034] The rotation shaft is moved to the center position of the detector through the positioning...

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Abstract

The invention provides a universal CT axis alignment method. The universal CT axis alignment method comprises the following steps of: imaging a positioning point at three rotation angle positions; and calculating the position of the positioning point relative to the rotating shaft according to the imaging geometrical relationship, and moving the positioning point to a position right above the rotating shaft.

Description

Technical field [0001] The present invention relates to synchronous radiation CT imaging, X-ray CT imaging, and non-destructive three-dimensional detection techniques, and more particularly to a universal CT assignment method. Background technique [0002] CT (Computed Tomography) is a three-dimensional imaging technology that collects three-dimensional imaging of the object using the CT reconstruction algorithm by collecting a two-dimensional image in a plurality of observation angles. In order to make full use of the effective imaging area of ​​the detector, it is necessary to allow the rotating shaft in the center position of the detector horizontal direction, and the center of the sample is placed directly above the axis of rotation, so the opposite axis is CT. A very important content in the imaging. It is assumed that the Z axis is the optical axis direction, the Y axis is the direction of rotation, the X axis and the Y-axis and the Z axis perpendicular. In order to enable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B15/04G01N23/046
CPCG01B15/04G01N23/046
Inventor 吴朝关勇刘刚田扬超陈亮
Owner UNIV OF SCI & TECH OF CHINA
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