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

Current modulation method and device in a computed tomography imaging system

A tomography and imaging system technology, applied in the field of medical imaging, can solve the problem that the actual current value of the X-ray tube cannot reach the current expected value and the like

Active Publication Date: 2016-06-01
NEUSOFT MEDICAL SYST CO LTD
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the process of realizing the present invention, the inventors of the present invention have found that there are at least the following problems in the prior art: due to the limitations of the CT system itself, the actual current value of the X-ray tube cannot reach the set current expectation value, such as figure 1 As shown, ultimately it is not really possible to produce diagnostically valuable images using the minimum radiation dose

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
  • Current modulation method and device in a computed tomography imaging system
  • Current modulation method and device in a computed tomography imaging system
  • Current modulation method and device in a computed tomography imaging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] see figure 2 , which is a flowchart of a current modulation method in a computed tomography imaging system disclosed in Embodiment 1 of the present invention, the method includes the following steps:

[0076] Step 201: selecting discrete data points on the desired current modulation curve as approximation points;

[0077] The "desired current modulation curve" is an ideal current modulation curve obtained according to any prior art. In fact, the desired current modulation curve is composed of a group of discrete data points. All discrete data points can be selected as approximation points, or some data points can be selected from all discrete data points as approximation points. For example, suppose that the expected current modulation curve consists of 1000 discrete data points, and 500 data points are selected as the approximation points, and the expected current value of the curve g(t) at the 500 approximation points is d i , i=1, . . . N, N=500.

[0078] It shou...

Embodiment 2

[0107] In some special use cases, more attention is often paid to whether the actual current value of the X-ray tube reaches the set current expectation value at some specific approach points (ie, specific positions). For example, in order to obtain better image quality, it is necessary to focus on whether the actual current value reaches the expected current value at the peak point; another example, in order to reduce the scanning dose and avoid damage to the human body, it is necessary to focus on the actual current value at the valley point whether the expected value of current is reached.

[0108] The difference between this embodiment and the first embodiment is that an approximation factor is set for the actual current value, and the approximation degree between the actual current value and the expected current value is also different if the approximation factor is different. see image 3 , which is a flowchart of a current modulation method in a computed tomography ima...

Embodiment 4

[0149] Corresponding to the above-mentioned current modulation method in a computed tomography imaging system, an embodiment of the present invention further provides a current modulation device in a computed tomography imaging system. see Figure 5 , which is a structural diagram of a current modulation device in a computed tomography imaging system disclosed in Embodiment 4 of the present invention, the device includes: an approach point selection module 501 , an actual current modulation curve establishment module 502 and a current modulation module 503 . The internal structure and connection relationship of the device will be further introduced below in conjunction with the working principle of the device.

[0150] Approximation point selection module 501, for selecting a plurality of sampling points on the desired current modulation curve as the approximation point;

[0151] An actual current modulation curve establishing module 502, configured to establish an actual cur...

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 method and apparatus of current modulation in a computed tomography imaging system are provided. The method may include: selecting a plurality of sample points from an expected current modulation curve as approach points; establishing an actual current modulation curve, wherein an actual current value of the actual current modulation curve at an approach point approximates an expected current value of an expected current modulation curve, and a variation rate of the actual current is within an allowed range of the computed tomography imaging system; and modulating a current in an X-ray tube of the computed tomography imaging system according to the actual current modulation curve. According to the disclosure, an image valuable to the diagnosis can be obtained with the smallest radiation dose.

Description

technical field [0001] The invention relates to the technical field of medical imaging, in particular to a current modulation method and device in a computed tomography imaging system. Background technique [0002] Computed Tomography imaging (CT, Computed Tomography) system uses a precisely collimated X-ray source and a highly sensitive detector to perform a series of cross-sectional scans around a certain part of the human body. After the attenuated X-ray beam passes through the human body, the analog quantity is converted into digital quantity by the analog / digital converter, and then input into the electronic computer, and the high-speed calculation of the electronic computer obtains the X-ray absorption coefficient value of each point of the layer. Using these data The matrix that makes up the image. Then, different data are displayed in different gray scales through the image display, so that the anatomical structure of the section can be clearly displayed on the moni...

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): A61B6/03
CPCH05G1/34A61B6/405A61B6/54G05B2219/33155G05B2219/36495G05B2219/41214G05B2219/42067H03C1/10H05G1/08H05G1/10H05G1/265
Inventor 王洪波
Owner NEUSOFT MEDICAL SYST CO LTD
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