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

Scanning-track-deviation-based imaging method and system

An imaging method and imaging system technology, applied in computerized tomography scanners, echo tomography, etc., can solve problems such as artifacts in images

Inactive Publication Date: 2012-06-20
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is still to reconstruct the system design orbit, and the image still has artifacts

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
  • Scanning-track-deviation-based imaging method and system
  • Scanning-track-deviation-based imaging method and system
  • Scanning-track-deviation-based imaging method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] The technical solution of the imaging method and system based on scanning orbital deviation will be described in detail below in conjunction with specific embodiments and drawings.

[0050] Such as figure 1 Shown, in one embodiment, a kind of imaging method based on scanning track deviation, comprises the following steps:

[0051] Step S110, define the variable function of the source orbit and the rotation angle, and define the projection of the object function at the rotation angle.

[0052] Using the Cartesian coordinate system to define the function of the source orbit and the rotation angle, an ideal source orbit is defined as follows:

[0053] r → 0 ( λ ) = ( R cos λ , R sin λ , h ...

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 invention relates to a scanning-track-deviation-based imaging method and system. The imaging method comprises the following steps: defining a variable function of a source track and a rotation angle, and defining the projection of an object function in the rotation angle; decomposing the source track into a chord, acquiring two ends of the chord, and determining the projection of the chord according to the two ends of the chord; establishing a back projection function according to the projection of the object function in the rotation angle and the two ends of the chord; re-establishing the object function according to the back projection function, the chord and the projection of the chord and acquiring an image of a scanned object according to the re-established object function. According to the scanning-track-deviation-based imaging method and system, the object image is re-established according to the object function based on an actual running source track, and the re-establishment result is a real image, so that an artifact can be effectively eliminated, the resolution of the re-established image is improved, noise is reduced and image quality is improved.

Description

【Technical field】 [0001] The invention relates to the field of imaging, in particular to an imaging method and system based on scanning track deviation. 【Background technique】 [0002] With the rapid development of CT (Computed Tomography, computerized tomography) technology, CT has become an effective tool for surgical guidance and radiotherapy evaluation. However, due to mechanical errors such as mechanical vibration, gravity, and bearing irregularities in the C-arm CT system, the "actual motion track of the system" often deviates from the "system design track". Since the traditional back-projection filtering algorithm uses system design orbits for reconstruction, it is easy to cause image artifacts. [0003] In order to correct image artifacts, a data correction method can be used to convert the data obtained from the "actual system trajectory" into data corresponding to the "system design trajectory", that is, to convert the actually obtained data into data suitable for...

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
IPC IPC(8): A61B6/03
Inventor 夏丹胡战利邹晶戎军艳桂建保张其阳蒋昌辉张成祥陈垚
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI