Patent
Multiphase flow imaging method based on gamma photon computer tomography imaging technology
TLDR
In this article, a multiphase flow imaging method based on a gamma photon computer tomography imaging technology is described, where a marker is prepared, and a multi-phase flow material is marked; 2, a fluid device and a detecting device run; 3, acquisition data is obtained, and 4, a detection image is obtained.Abstract:
The invention relates to a multiphase flow imaging method based on a gamma photon computer tomography imaging technology and belongs to the field of multiphase flow measurement. The multiphase flow imaging method comprises the following steps that 1, a marker is prepared, and a multiphase flow material is marked; 2, a fluid device and a detecting device run; 3, acquisition data is obtained, and a computer is utilized to perform data recombination and reconstruction; 4, a detection image is obtained. The method is not limited by fluid device materials and fluid properties and has higher flexibility, and different imaging structures algorithms can be flexibly adopted according to shapes of devices to be detected.read more
Citations
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Patent
Method for measuring pipeline flow with positron annihilation technology
TL;DR: In this article, a positron radioactive marker is injected into a pipeline, a sectional image about pipeline section positron nuclide distribution is obtained through a detector array and a related processing circuit under the annihilation action of positrons radiated during radionuclide decay, and sectional velocity distribution and flow information of a fluid in the measured pipeline are obtained through image processing.
Patent
System and method for measuring flow field in closed environment by utilizing positron annihilation technology
TL;DR: In this paper, a system and a method for measuring a flow field in a closed environment by utilizing a positron annihilation technology is presented, where a carrier particle tracing method is adopted, and the positron nuclide with activity and a carrier solution are fully mixed according to a certain ratio to prepare a positRON marker; a pulse electromagnetic valve and a particle generating device are adopted to fill carrier particles with certain sizes and numbers into a pipeline or the sealed flow field.
References
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Expectation maximization reconstruction of positron emission tomography images using anatomical magnetic resonance information
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Particle flow in a hydrocyclone investigated by positron emission particle tracking
TL;DR: In this paper, the authors used a modified Stairmand high-efficiency geometry with a long cone to track a particle through a hydrocyclone acting on water and found that the particle path was much larger than the cut size of the cyclone, exhibited excursions into the inner, upwardly directed, part of the vortex giving rise to recirculatory loops.
Patent
Kalman filtering image reconstruction method in PET imaging
TL;DR: In this article, a method for reconstructing Kallman filtering image in PET imaging was proposed, which includes steps as follows: obtaining a sinusoidal chart of an original projective line through PET positron emission faultage scanner, establishing a state space system, getting radioactivity activity distribution through the KAllman filtering method based on the state space and rebuilding image.
Patent
Positive computerized tomography restoration method for multi-phase horizontal set
TL;DR: In this article, a positron tomographic scanning image reconstruction method of multiphase level set is presented, which mainly includes the following steps: obtaining projection data, defining number of level set functions, using K mean cluster method to obtain initial concentration value of image, calculating to obtain object function for reconstructing image, solving partial derivatives, obtaining current level set evolve correction, updating reconstructed image, obtaining estimated image and concentration estimated value, and converging reconstructed image.