Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Cardiac Axial Movement Correction Method for Myocardial Spectrum Perfusion Imaging

A technology of axial movement and correction method, which is applied in image data processing, equipment for radiological diagnosis, medical science, etc., can solve problems such as misdiagnosis, false positive, myocardial blood perfusion image defects, etc., to broaden the scope of application, The effect of improving accuracy

Active Publication Date: 2017-02-22
SHENZHEN BASDA MEDICAL APP
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The movement of the heart may cause defects in myocardial blood perfusion images, resulting in false positives and misdiagnosis

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
  • Cardiac Axial Movement Correction Method for Myocardial Spectrum Perfusion Imaging
  • Cardiac Axial Movement Correction Method for Myocardial Spectrum Perfusion Imaging
  • Cardiac Axial Movement Correction Method for Myocardial Spectrum Perfusion Imaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Correction for a single move

[0028] This embodiment is used to simulate the situation that all projections after a certain frame have the same displacement during the acquisition process.

[0029] Collection of projections:

[0030] Imaging instrument SPECT, injected in myocardial model 99 Tc m Myocardial perfusion imaging was performed 30 minutes after injection at 1 mCi. The probe was rotated from right anterior oblique 45° to left posterior oblique 45°. The angular interval between frames was 6°. Each probe had 16 frames, and a total of 32 frames were collected. A low-energy high-resolution collimator was selected, the acquisition matrix was 64×64, the magnification factor was 1.46, and each frame was collected for 20s.

[0031] During data acquisition, the phantom was manually moved, and the actual size of the movement was determined by a ruler fixed on the examination table.

[0032] data processing:

[0033] (1) After the projection data collection is compl...

Embodiment 2

[0055] The difference from Embodiment 1 is that steps (1) and (2) are implemented by manually moving to correct the displacement of the projection.

Embodiment 3

[0057] The difference from Embodiment 1 is that step (8) uses other criteria to stop the iterative process, such as comparing the difference between the corrected projection and the reprojection, such as the mean square error of each pixel, and uses the established difference criteria to stop the iteration.

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

A heart axial movement correcting method for myocardium SPECT (single photon emission computed tomography) perfusion imaging comprises the following steps of (1) preliminarily estimating sizes of axial displacements of various projections after projection data are acquired; (2) preliminarily correcting the various projections according to preliminary estimated values of the axial displacements of the various projections; (3) reconstructing a three-dimensional image by projection data of the axial displacements corrected preliminarily; (4) re-projecting the reconstructed image according to actual projection acquisition conditions; (5) analyzing the original projections and corresponding re-projections, and calculating the axial displacements of actual projections; (6) correcting the projections according to axial displacement values of the actual projections on the previous step; (7) reconstructing a three-dimensional image by using the projection data of the axial displacement corrected on the previous step; and (8) repeating the fourth step and the fifth step, finishing correction when the maximum difference of the corresponding correction values is smaller than a required value, and repeating the sixth step to the eighth step if the maximum difference of the corresponding correction values is not smaller than the required value.

Description

technical field [0001] The invention relates to the field of nuclear medical imaging equipment, and is particularly suitable for a method for correcting the axial movement of the heart when a single-photon computed tomography device is used for myocardial perfusion imaging. Background technique [0002] Due to the long acquisition time of SPECT myocardial perfusion imaging, voluntary or involuntary factors such as the subject's body movement, breathing, and visceral movement during the acquisition process will cause the heart to move, causing movement artifacts in the reconstruction results and affecting the diagnosis. result. According to statistics, during the acquisition process of myocardial perfusion tomography, about 25% of the subjects will have different degrees of body movement. The movement of the heart may cause defects in myocardial perfusion images, resulting in false positives and misdiagnosis. Contents of the invention [0003] The technical problem to be ...

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): A61B6/02G06T17/00
Inventor 曹文田陈文波
Owner SHENZHEN BASDA MEDICAL APP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com