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Data acquisition method and system based on dual-energy CT and computer readable storage medium

A technology of data acquisition and projection data, which is used in radiological diagnostic image/data processing, radiological diagnostic equipment control, computed tomography scanners, etc. Problems such as voluntary movement, to achieve the effect of good consistency, reducing the probability of voluntary movement and involuntary movement, and shortening the time interval

Pending Publication Date: 2021-04-23
FMI MEDICAL SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem with this acquisition scheme is that the time interval between two scans is long, the probability of voluntary and involuntary movement of the patient increases, and the probability of mismatching high and low dose data increases accordingly

Method used

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  • Data acquisition method and system based on dual-energy CT and computer readable storage medium
  • Data acquisition method and system based on dual-energy CT and computer readable storage medium
  • Data acquisition method and system based on dual-energy CT and computer readable storage medium

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no. 1 example

[0037] The first embodiment, also known as the short-term continuous scanning scheme, first sets the high-dose scanning parameters and low-dose scanning parameters, uses the axial scan mode, and uses the same ray source 1 to scan the high-dose scanning parameters and low-dose The dose scan parameters continuously perform the high dose scan process and the low dose scan process to obtain high dose projection data and low dose projection data. In this embodiment, in the axial scan mode, two consecutive scans of high and low doses are performed before each precession of the scanning bed 3. Therefore, the time interval of the high and low dose data is close to the time of one revolution of the gantry, and high-speed scanning It can reach 0.25s / circle, which can overcome the movement displacement difference of human organs. However, in the existing two scans, it is first necessary to complete the scanning of all scanning bed 3 precession positions under a high dose, and then the sc...

no. 2 example

[0039] In the second embodiment, it is also called the high-dose and low-dose fast switching scheme. Firstly, the high-dose scanning parameters and the low-dose scanning parameters are set. The high-dose scanning process and the low-dose scanning process are respectively carried out at each scanning angle, and the high-dose scanning process and the low-dose scanning process of two adjacent scanning angles are alternately performed to obtain the high-dose projection data and low-dose projection data of each scanning angle. data, the interval angle between the high-dose projection data and the low-dose projection data is the interval between two adjacent scanning angles. The high-dose projection data and / or the low-dose projection data are rearranged according to the interval angle between the high-dose projection data and the low-dose projection data, so that the high-dose projection data and the low-dose projection data exist in the same scanning direction.

[0040] Wherein, i...

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Abstract

The invention discloses a data acquisition method and system based on dual-energy CT, and a computer readable storage medium. The method comprises the steps of performing a high-dose scanning process and a low-dose scanning process in a scanning period to obtain high-dose projection data and low-dose projection data; wherein in one scanning period, a scanning frame of the CT equipment is started and stopped only once, and a scanning bed of the CT equipment only has a precession process once; rearranging the high-dose projection data and / or the low-dose projection data to enable the high-dose projection data and the low-dose projection data to exist in the same scanning direction; and reconstructing a high-dose CT image according to the projection data, so that the problem that a low-dose CT image is poor in quality is solved. According to the method, the time interval between high-dose data and low-dose data is shortened, and the probability of autonomous movement and non-autonomous movement of a patient is reduced, so that the probability of mismatching of the high-dose CT data and the low-dose CT data is reduced or even eliminated.

Description

technical field [0001] The present invention relates to the technical field of CT equipment, in particular to a dual-energy CT-based data acquisition method, system and computer-readable storage medium. Background technique [0002] Computed tomography (computed tomography, CT) is a device that uses X-ray rotation to irradiate the object to be measured, and then obtains a tomographic image of the object through computer processing. With the wide application of CT technology, patients receive more and more X-ray radiation doses. In order to reduce the radiation dose to patients, low-dose CT has received more and more attention. However, the reduction of scanning dose will affect the reconstructed image quality. In order to ensure the image quality under low-dose scanning, iterative reconstruction technology and deep learning technology have been widely studied and applied to the reconstruction of low-dose CT. Among them, the low-dose CT reconstruction technology based on d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/032A61B6/52A61B6/54
Inventor 陈伟侯晓文叶宏伟
Owner FMI MEDICAL SYST CO LTD