10 results about "Computed tomography" patented technology

The present invention, called Color Spectral Imaging (CSI), generally pertains to a method of displaying colorized two-dimensional medical images of human anatomy. Specifically, the present invention pertains to a method of assigning predetermined range of colors to computed tomography images for enhanced visualization.

The invention discloses a computed tomography (CT) image and magnetic resonance (MR) image fusion method capable of improving program execution efficiency. The invention adopts the technical scheme that: direct statistics is conducted to the gray-level histograms of the images; and the contrast and the second order contrast of the source images are calculated according to the gray-level histograms. The adopted algorithm is as follows: the second order contract of corresponding pixels between the source images is compared, a second order contrast value with a bigger absolute value is kept, then the contrast of a fused image is calculated according to a contrast mode and the second order contrast value, and finally the gray value of the fused image is calculated according to the contrast value and the gray mode of the fused image. The CT image and MR image fusion method has the beneficial effects that: the contrast and the second order contrast of the source images are calculated according to the gray-level histograms, so that the source images do not need to be converted, the computational load is significantly reduced, the program execution efficiency is improved, and the subjective effect of the fused image is significantly improved.

The invention discloses an experiment device for ground penetrating radar CT (Computed Tomography) transmission detection. The device comprises a box body, an antenna moving driving system, a ground penetrating radar transmitting antenna, a ground penetrating radar receiving antenna, a radar host, and a base. The ground penetrating radar transmitting antenna and the ground penetrating radar receiving antenna are arranged on two sides of the box body, and are connected with the antenna moving driving system. The ground penetrating radar receiving antenna is connected with the radar host. The experiment device for ground penetrating radar CT transmission detection has the advantages that the antenna moving driving system can control the ground penetrating radar transmitting antenna and the ground penetrating radar receiving antenna to automatically complete data acquisition according to a preset path, so that accurate recordings of data track numbers and detection position information are achieved, and data acquisition errors are reduced; and automatic acquisition of data can effectively reduce electromagnetic wave interference caused by operators, so that experiment operation flow is simplified.

The invention provides a DenseNet-based CT image classification method and a DenseNet-based CT image classification device for COVID-19 patients, which are used for classifying according to computed tomography images of suspected COVID19 patients to obtain a classification result. The method includes the following steps of: storing medical image information; preprocessing by using a preprocessing method to obtain preprocessed data; obtaining deep information and shallow information from the preprocessed data by using the trained dense connection neural network model, and fusing the deep information and the shallow information to obtain a fused feature vector; mapping the fusion feature vector to a low-dimensional space by using an activation function to obtain a classification probability prediction value; obtaining a CAM activation graph based on the internal parameters of the densely connected neural network model and the computed tomography image; displaying a computed tomography image, a classification probability prediction value, and a CAM activation map to assist a doctor in diagnosis. The method and the device are suitable for an early screening stage of an epidemic situation area, the problem of too high false negative of accounting detection can be solved, and the diagnosis efficiency can be improved.

The invention provides a CT machine part connecting system based on a back board, and relates to the technical field of computed tomography system (CT instrument) production, in particular to the structure technique of a scanning rack of a computed tomography system. The ring circuit back board is arranged on one side of the rack. The CT machine part connecting system is characterized in that the ring circuit back board is composed of at least two sections of arc-shaped back board bodies on which circuits are printed; every two adjacent arc-shaped back board bodies are connected through an inter-board connector with a circuit, and then an annulus is defined by all the arc-shaped back board bodies; each arc-shaped back board body is provided with a part port.

The invention discloses an in-situ rapid detection method of a dynamic elastic modulus. The method comprises the following steps: step 1, detecting by an elastic wave CT (Computed Tomography) opposite penetration method; 2, arranging elastic wave rays in a typical elastic wave CT detection section; step 3, elastic modulus acquisition and concrete quality evaluation; the method has the advantage that the dynamic elastic modulus of the concrete frame of the large generator set can be well detected. The method is not limited to detection of concrete in a laboratory to obtain dynamic elastic modulus data, the dynamic elastic modulus data of mass concrete can be obtained on site, and the quality of the concrete can be judged on site.

An embodiment of the invention provides a quantitative determination method of interbedded cross flows of heterogeneous rock core models. The method is achieved by comparing oil extraction amount, calculated in a layered mode, of each single-layer model and oil saturation, obtained in a CT scanning method, of each single-layer model. The method successfully solves the difficult problems of quantitatively describing oil saturation dynamic distribution and layered calculation inside a multi-layer rock core in a flood pot test of the interbedded heterogeneous rock core models, achieves quantitative calculation of the interbedded cross flows in the water flooding process, and plays an important role in learning about a heterogeneous water flooding rule and mutual actions between layers, determining experiment assessments of remaining oil distribution and adjusting development measures.

A fine needle aspiration device with a modified handle and cannula through which a vacuum is delivered to the targeted tissue for removal of liquid or cellular samples is provided, the vacuum being provided via a flexible tubing capable of fitting within a restricted space such as, for example, a CT gantry. A vacuum source may be provided to assist the fine needle aspiration procedure via flexible tubing, which allows the vacuum source to be located outside the CT gantry or on the patient.