Automatic exposure control system and image correction method
An automatic exposure and control system technology, applied in the field of radiation imaging, can solve problems such as unsuitable multi-ray sources, and achieve the effect of solving inconsistent X-ray output and optimizing instability
Active Publication Date: 2020-07-24
NANOVISION TECHNOLOGY (BEIJING) CO LTD
View PDF16 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, the above-mentioned automatic exposure control is only for a single ray source, and is not suitable for CT systems with multiple ray sources
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0048] The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0049] In order to solve the problem of inconsistent X-ray output energy of multiple X-ray sources in a multi-ray source CT system, such as figure 1 As shown, the present invention provides an automatic exposure control system, including a main control unit 1 and a plurality of automatic exposure units 2, the main control unit 1 is connected to each automatic exposure unit 2, and each automatic exposure unit 2 is cascaded, each Each automatic exposure unit 2 is installed at the outlet of the corresponding X-ray source.
[0050] The automatic exposure unit 2 is used to receive the exposure signal sent by the main control unit 1, and realize the detection of the corresponding X-ray source, so as to obtain the KV level of the X-ray output by the X-ray source and send it to the main control unit 1. At the same tim...
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
Login to View More Abstract
The invention discloses an automatic exposure control system and an image correction method. The system comprises a main control unit and a plurality of automatic exposure units, the main control unitis connected with the automatic exposure units, and the automatic exposure units are in cascade connection. According to the system, each X-ray source is detected through the automatic exposure unit;an energy accumulation value and a KV level of the X-ray are obtained; when the energy accumulation value of the X-rays reaches an energy threshold value; sending an automatic exposure control signalto a main control unit, enabling the main control unit to perform exposure according to the automatic exposure control signal; according to the X-ray image system, the exposure time sequence is adjusted, the purpose of automatic exposure control is achieved. Meanwhile, energy output by single exposure of the X-rays is kept relatively fixed, the problem that output of the X-rays is unstable is solved, and therefore the problem that output of the X-rays of all the ray sources in the X-ray image system with the multiple ray sources is inconsistent is solved.
Description
technical field [0001] The invention relates to an automatic exposure control system and a corresponding image correction method, belonging to the technical field of radiation imaging. Background technique [0002] For multi-source static CT systems, due to the differences in the performance of individual X-ray sources, after setting the same exposure conditions (such as X-ray tube voltage and current, exposure time, referred to as kV, mA and ms) for each X-ray source, each The kV, mA and ms of the X-rays actually output by each X-ray source will have certain differences. Among them, the difference in kV of X-rays belongs to the difference in energy level, which will lead to deviations in the calculated CT value (the pixels of the image finally presented by the device are represented by CT values), and the difference in mA and ms of X-rays will cause differences in signal-to-noise ratio , thus further affecting the calculation of CT value. [0003] Usually, an automatic ex...
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
Login to View More IPC IPC(8): H04N5/235H04N5/32
CPCH04N5/32H04N23/70H04N23/73H04N17/002H04N23/30A61B6/542A61B6/545H04N25/30A61B6/582A61B6/4007G06T7/80G06V10/751G06T7/0012G06T2207/10116G06T2207/10144
Inventor 崔志立李运祥张有为魏青
Owner NANOVISION TECHNOLOGY (BEIJING) CO LTD