Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of CT machine, scanning method and image reconstruction method

A technology of image reconstruction and tomography, which can be used in image data processing, graphic image conversion, computer tomography, etc., and can solve problems such as aliasing artifacts

Active Publication Date: 2021-08-20
沈阳晟诺科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Embodiments of the present invention provide a CT machine, a scanning method, and an image reconstruction method to solve the technical problem of aliasing artifacts in existing CT scanning systems

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of CT machine, scanning method and image reconstruction method
  • A kind of CT machine, scanning method and image reconstruction method
  • A kind of CT machine, scanning method and image reconstruction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Such as Figure 1-2 As shown, a computed tomography device provided by an embodiment of the present invention includes a fixed frame 1, a rotating frame 2, a light source generating device 3, a signal detecting device 4, and a scanning target supporting device 5: the rotating frame 2 can surround X-Y Rotate at a fixed point on the plane; the scanned target supporting device 5 is fixed along the Z direction to meet the tomographic scanning trajectory, and the X-Y-Z coordinate system meets the definition of the right-hand system; the light source generating device 3 is installed on the rotating frame 2, The scanning light of the cone beam can be output, and the focus position can be quickly switched along the Z direction during the adjacent sampling cycle, and the center position of the light source can be continuously moved along the Z direction; the signal detection device 4 is installed on the rotating frame 2, and the The position of the light source generating device...

Embodiment 2

[0084] Such as image 3 As shown, the embodiment of the present invention also provides a scan control method using any one of the computer tomography devices described above, wherein the computer tomography device will not be described again. The scan control method may include the following steps:

[0085] S101: While the light source generating device 3 and the signal detecting device 4 are rotating and scanning in the X-Y plane, the scanning object support device 5 is fixed in the Z direction to meet the tomographic scanning trajectory, when the tomographic scanning Sampling is triggered in an equiangular manner, the total number of projection samples is an even number, defined as N, and the collection range can be less than one circle, exactly one circle, or more than one circle;

[0086] S102: When the tomographic scan is started, the position of the focus of the light source generating device on the anode target surface is continuously and rapidly switched while the ce...

Embodiment 3

[0104] Such as image 3 As shown, the embodiment of the present invention also provides a method for image reconstruction based on the data obtained by any of the scanning control methods described above, the CT machine adopts the CT machine as described in Embodiment 1, and the scanning method is as in the embodiment 2 and will not be repeated here. And the method for performing image reconstruction on the data obtained by the scanning control method comprises the following steps:

[0105] S201: Perform necessary preprocessing on the scanned data;

[0106] S202: rearranging the data preprocessed in the above step S201;

[0107] S203: Filter and weight the data rearranged in the above step S202;

[0108] S204: Back-project the filtered and weighted data in the above step S203;

[0109] S205: Post-processing the back-projected data in step S204 above to obtain an image that can be used for diagnosis.

[0110] Particularly, the step S202 includes:

[0111] S2021: At differ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The embodiment of the present invention relates to a computerized tomography device, a scanning method and an image reconstruction method, including a fixed frame (1), a rotating frame (2), a light source generating device (3), a signal detecting device (4) and a scanning object support device (5), the rotating frame can rotate around a fixed point on the X-Y plane, and the scanning object support device is fixed along the Z direction; the light source generating device is installed on the rotating frame, and can output a cone The scanning light of the shaped beam, and the focus position is quickly switched along the Z direction during adjacent sampling cycles, and the center position of the light source is continuously moved along the Z direction; the signal detection device is installed on the rotating frame, and the position of the light source generating device is Relatively, and the relative position of the light source generating device does not change during the rotation process, so as to ensure that the cone beam light source can be received by the signal detection device area array; the signal detection device is a surface adapted to collect the cone beam array structure.

Description

technical field [0001] The invention relates to the technical field of medical computed tomography, in particular to a scanning mode of a CT machine for generating high-resolution images and a corresponding image reconstruction method, and a CT machine using the scanning mode and reconstruction method. Background technique [0002] CT (Computed Tomography), also known as computerized tomography equipment. With the development of technology, CT machine has gradually developed from the traditional slice imaging method, that is, imaging in the rotation plane (here called X-Y plane), to volume imaging method, that is, continuous imaging in the direction of the rotation axis (here called Z direction). imaging. This is mainly brought about by the maturity of technologies such as volume continuous scanning mode, area array detector and cone beam reconstruction method. [0003] With the wide application of volume (three-dimensional) imaging methods (MPR, VR, etc.) in clinical diag...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03G06T3/40G06T3/60
CPCA61B6/032A61B6/4021A61B6/42A61B6/52G06T3/4023G06T3/608
Inventor 任毅
Owner 沈阳晟诺科技有限公司