27 results about "Three dimensional tomography" patented technology

The invention belongs to the technical field of retina imaging and fundus three-dimensional reconstruction, and particularly relates to a color three-dimensional fundus imager optical system. Comprising a large eye objective lens, a dichroscope, a hollow reflector, a focusing lens, a spectroscope, a retina lens, a retina imaging chip, a fixation lens, a sighting mark lamp, an illumination lens, an annular light source, a pupil lens, a pupil imaging chip, an infrared lens, an infrared dodging lens, an infrared light source, a scanning lens, a three-dimensional galvanometer, a collimator, a coupler, a frequency sweeping light source and a dispersion compensator. A polarization controller, a coupler and a photoelectric detector. The system is mainly composed of a visible light imaging light path, an infrared imaging light path and a laser imaging light path, the visible light imaging light path is used for shooting color fundus two-dimensional images, the infrared imaging light path is used for real-time positioning and focusing of human eye pupils, and the laser imaging light path is used for three-dimensional tomography of retinas. The objective of the invention is to solve the problem that existing medical equipment cannot acquire fundus color three-dimensional images.

The present invention comprises a computer-implemented method for automating the co-registration of SEM and 3D microtomography images in rock sample cylinders, characterized by comprising three main steps: (i) image pre-processing; (ii) internal orthogonal search; (iii) external multi-angle search. The method plays a fundamental role in the creation of image pairs. These pairs capture the same region of the rock, but with different analytical properties. Thus, the co-registration between 2D microscopy and 3D tomographic data provides a fundamental basis for the application of machine learning techniques and the expansion of the originally planar mineralogy to the entire three-dimensional volume. The three-dimensional mineralogical model generated from this co-registration has fundamental implications for the creation of digital rock models. The automation of the co-registration process between these acquisitions contributes to the advancement of petroleum engineering, since co-registration accelerates the process of generating image pairs for the use of machine learning algorithms in the generation of the three-dimensional mineralogical model. This method, in its turn, has direct application both in oil reservoir engineering and in geological interpretation.

The invention relates to the technical field of magnetic particle imaging, in particular to a non-magnetic field line three-dimensional magnetic particle imaging method and system based on weak gradient coding, and the method comprises the steps: driving a zero magnetic field line to carry out the spiral scanning of an imaging object; exciting a nonlinear response signal generated by magnetic particles of the imaging object; obtaining a two-dimensional image of magnetic particle concentration distribution in the imaging object; performing spatial position coding on the zero magnetic field line; obtaining target magnetic particle concentration distribution on the zero magnetic field line; and obtaining a three-dimensional image of the magnetic particle concentration distribution in the imaging object. According to the invention, the zero magnetic field line along the axial direction is constructed, and the Halbach permanent magnet array is driven to carry out visual field scanning of two-dimensional imaging. Two-dimensional imaging is carried out by adopting axial projection, then three-dimensional reconstruction is carried out under the guidance of the two-dimensional reconstruction image, and the three-dimensional reconstruction image is reconstructed by encoding the zero magnetic field line, that is, the three-dimensional image reconstruction can be completed only by scanning twice, and the imaging speed is higher compared with the traditional three-dimensional tomography.

Several calibration methods for particle imaging systems are proposed that allow the determination of lateral focus shifts as a function of focusing changes or refocusing. Distortions in particle-optical images generated with appropriately calibrated systems can thus be reduced, and metrological investigations in these images, and especially in 3D tomography, can be performed with greater accuracy. With appropriately calibrated particle imaging systems, 3D samples, such as deep channels in semiconductor samples, can be measured more precisely. Distortion effects arising from sample geometries in electrostatic immersion fields can also be calibrated and thus corrected.

A dual beam device for three-dimensional volume image generation of semiconductor objects within a wafer and a method of operating the dual beam device are provided. The dual beam device comprises a closed loop monitoring system between a focus point of a charge-particle beam imaging system and an inspection site on a wafer mounted on a wafer stage. Thereby, drifts between a charge-particle beam imaging system and the wafer stage are mitigated.

The invention discloses an all-fiber three-dimensional tomography system, which is used for performing three-dimensional tomography on an object to be observed at a high speed and comprises a light source, a first optical coupler, a first optical circulator, a first optical collimator, a first convex lens, an electric control attenuator, a second optical circulator, a second optical collimator, a second convex lens, a second optical coupler and a balance detector. The light source included in the all-fiber three-dimensional tomography system can quickly perform line or plane scanning on optical scattering media such as biological tissues and the like by utilizing a technology of capturing optical signals to obtain images and adopting an all-fiber line architecture, so as to obtain high-resolution three-dimensional images.

A method and a related apparatus for performing a tomographic examination of an object (2) which advances through an examination area (6), wherein the examination area (6) is irradiated with x-rays transversally to a motion trajectory of the object (2) and the residual intensity of the x-rays which have crossed the object (2) is repeatedly detected to obtain, for each detection, an electronic two-dimensional pixel map, the two-dimensional maps thus obtained being processed by a computer to obtain a three-dimensional tomographic reconstruction of the object (2); wherein, during the advancement, the object (2) is made or let rotate, at least partly uncontrolled, in such a way that the object (2) rotates around one or more rotation axes which are transversal both to the motion trajectory and to the propagation directions of the x-rays crossing it; and wherein a computer also determines the spatial position in which the object (2) is located relative to the one or more emitters (4) and / or the one or more detectors (5) at the instant when each two-dimensional map is detected, and factors this in the tomographic reconstruction.

The present invention belongs to the field of biomedical imaging technology, and specifically relates to a magnetic nanoparticle imaging system and method based on pre-polarization, aiming to solve the problems that existing magnetic nanoparticle imaging devices rely on differential receiving coils and are not robust to background interference signals. The present invention includes: a group of pre-polarizing coils, a group of gradient and horizontal scanning coils, a group of excitation and vertical scanning coils, and a group of non-differential receiving coils, which are used for pre-polarizing magnetic nanoparticles to a semi-saturated state, exciting a magnetic field and spatially encoding along the horizontal and vertical directions, and inducing changes in magnetization intensity; a signal acquisition and image reconstruction module, which is used to acquire the induced voltage signals of a group of non-differential receiving coils during the three-dimensional tomographic scanning of the imaging target, and perform magnetic nanoparticle imaging reconstruction. The present invention realizes the detection of magnetization pulse signals without background interference and magnetic nanoparticle imaging, and the system has strong robustness.

A method uses inpainting, whereby the ability to optimize the reconstruction of images at high resolution and sensitivity with minimal pixels is hard wired into the IRFPA. By combining several of these systems, or by selecting different pixels in the array to form images of different colors, hyperspectral images and 3-D tomograms can also be obtained with a significantly smaller number of pixels.

1. Name of the designed product: animal CT machine (Vetmax 9). 2. Use of the designed product: used for animal X-ray two-dimensional planar imaging and three-dimensional tomographic imaging. 3. Design points of the designed product: the overall shape of the product. 4. Picture or photo best indicating the design points: perspective view 1.

The high-precision three-dimensional tomography device based on the FIB-SEM double-beam system comprises a machine box and a scanning electron microscope, a walking mechanism is fixedly installed on the top of the machine box, and the walking mechanism is at least used for rotary motion of the scanning electron microscope; a rotary motor is arranged above the walking mechanism and is at least used for the rotary motion of the scanning electron microscope; a telescopic arm assembly is mounted above the rotary motor and is at least used for adjusting the horizontal position of the scanning electron microscope; a lifting mechanism is fixedly installed at one end of the telescopic arm assembly. The angle adjusting mechanism can adjust the pitching angle of the scanning electron microscope, the height of the scanning electron microscope is adjusted through the lifting mechanism, the horizontal position of the scanning electron microscope is adjusted through the telescopic arm assembly, and the rotary motor can drive the scanning electron microscope to rotate. The walking mechanism can enable the scanning electron microscope to rotate around the storage table, and all-directional scanning of the circuit board on the storage table is achieved.

Disclosed herein are systems, devices, and methods for image-guided surgery. Some systems include a head-mounted unit, having a see-through augmented-reality display and a depth sensor, which is configured to generate depth data with respect to a region of interest (ROI) of a body of a patient that is viewed through the display by a user wearing the head-mounted unit. A processor, which is configured to receive a three-dimensional (3D) tomographic image of the body of the patient, computes a depth map of the ROI based on the depth data generated by the depth sensor, to compute a transformation over the ROI so as to register the tomographic image with the depth map, and to apply the transformation in presenting a part of the tomographic image on the display in registration with the ROI viewed through the display.

1. The name of the design product: animal CT machine (vetist 7). 2. The use of the design product: for animal X-ray two-dimensional plane imaging and three-dimensional tomographic imaging. 3. The design points of the design product: in the overall shape of the product. 4. The picture or photo that best indicates the design points: perspective view 1.

1. The name of the design product: animal CT machine. 2. The use of the design product: for animal X-ray two-dimensional plane imaging and three-dimensional tomographic imaging. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

1. The name of the design product: animal CT machine (Yuanrui 9). 2. The use of the design product: for animal X-ray two-dimensional plane imaging and three-dimensional tomographic imaging. 3. The design points of the design product: in the overall shape of the product. 4. The picture or photo that best indicates the design points: perspective view 1.

The present invention relates to a method for assigning quality classes to seeds of a population comprising, in a first analysis step: acquiring three-dimensional (3D) tomography image data by means of a three-dimensional tomography imaging method of seeds of one or more samples of the population, determining quality characteristics of the sample seeds and / or of seedlings developing therefrom, classifying them into one or more quality classes based on the determined quality characteristics, and assigning quality classes determined for the respective sample seed to the corresponding 3D tomography image data of this sample seed; And in a second step: generating synthetic phenotypic data from the corresponding 3D tomography image data of a sample seed for at least one spatial position of the sample seed, and annotating the synthetic phenotypic data with the quality classes assigned to the corresponding 3D tomography image data. In a further step, one or more quality classes can be assigned to any seeds in the population from which real phenotypic data are recorded or measured.

Several calibration methods for particle imaging systems are proposed that allow the determination of lateral focus shifts as a function of focusing changes or refocusing. Distortions in particle-optical images generated with appropriately calibrated systems can thus be reduced, and metrological investigations in these images, and especially in 3D tomography, can be performed with greater accuracy. With appropriately calibrated particle imaging systems, 3D samples, such as deep channels in semiconductor samples, can be measured more precisely. Distortion effects arising from sample geometries in electrostatic immersion fields can also be calibrated and thus corrected.

The present invention relates to a method for assigning quality classes to seeds of a population, the method comprising, in a first analysis step: acquiring three-dimensional (3D) tomography image data relating to seeds of one or more samples of the population by means of an imaging three-dimensional tomography method, determining quality properties of the sample seeds and / or of young plants developing therefrom and classifying them into one or more quality classes on the basis of the determined quality properties and assigning quality classes determined for each sample seed to the corresponding 3D tomography image data relating to said sample seed; and in a second step: generating synthetic data regarding the phenotype from the associated 3D tomography image data relating to a sample seed for at least one spatial position of the sample seed, and annotating the synthetic data regarding the phenotype with the quality classes assigned to the associated 3D tomography image data. In a further step, one or more quality classes can be assigned to any seeds of the population for which real data regarding the phenotype is captured or measured.

A method and a dual beam device for three-dimensional volume image generation of semiconductor objects within a wafer can provide higher accuracy. The method and device can be configured to mitigate drifts between a charge-particle beam imaging system and a wafer stage by monitoring displacement vectors and considering the displacement vectors during 3D pixel interpolation from a plurality of two-dimensional cross section images.

A method comprises, during ion-beam milling of a cross-section surface into a wafer with an ion beam, compensating a milling-induced charging by scanning a charged particle imaging beam over a segment of the cross-section surface. The method further comprises adjusting a kinetic energy of the charged particle imaging beam to reduce a surface charge generated during ion-beam milling.

The application discloses a full-optical fiber three-dimensional tomography system, which comprises a sweep-frequency laser, a first optical coupler, a first optical circulator, a first optical collimator, a first convex lens, an electrically-controlled attenuator, a second optical circulator, a second optical collimator, a second convex lens, a second optical coupler and a balance detector. The sweep-frequency laser of the full-optical fiber three-dimensional tomography system can utilize the technology of acquiring optical signals to obtain images and adopt a full-optical fiber circuit architecture, so that linear or plane scanning can be rapidly performed on optical scattering media such as biological tissues, and high-resolution three-dimensional images can be obtained.

- Method for determining the strain field of at least one paint layer applied to a substrate during the curing of the paint layer(s). - The determination method comprises a step (E1) of providing a sample (1), a step (E2) of 3D tomographic measurement of the sample (1), and a series of successive steps (S) repeated iteratively, including a step (E3) of dynamic mechanical analysis of the sample (1) subjected to at least one temperature cycle (C), a step (E4) of 3D tomographic measurement of the sample (1), and a step (E5) of determining the strain field of each paint layer (3) of the sample (1). Figure for the abstract: Fig. 1

Disclosed herein is a medical system (100, 300, 400) comprising: a memory (110) storing machine executable instructions (120) and a computational system (104). Execution of the machine executable instructions causes the computational system to: receive (200) modified three-dimensional tomographic medical image data (122) that has been facially erased within a facial zone (128); fit (202) a model-based segmentation (126) to the modified three-dimensional tomographic medical image data, wherein the model-based segmentation comprises multiple surface meshes (602, 604, 606, 608, 700) that define anatomical regions (800); label (204) each of the voxels of a reconstructed region (130) of the modified three-dimensional tomographic medical image data with an anatomical label according to anatomical regions defined by the multiple surface meshes; and assign (206) a contrast value to voxels in the reconstructed region using the anatomical label to provide repaired three-dimensional tomographic medical image data (132).

1. Name of the product in this design: Animal CT Scanner (Micro-Smart). 2. Application of this design: for animal X-ray two-dimensional planar imaging and three-dimensional tomographic imaging. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The volume change of liquid and solid gallium has been studied as a function of pressure and temperature up to 3.02 GPa at 300 K and up to 3.63 GPa at 330 K using synchrotron x-ray microtomography combined with energy dispersive x-ray diffraction techniques. Two sets of directly measured P-V data at 300 K and 330 K were obtained from 3D tomography reconstruction data, and the corresponding isothermal bulk moduli were determined as 23.6 (0.5) GPa and 24.6 (0.4) GPa, respectively. The existence of a liquid-liquid phase transition region is proposed based on the abnormal compressibility of Ga melt at about 2.44 GPa and 330 K conditions.

The invention provides an illegal garbage identification processing method and system for a garbage incineration plant and a medium, and belongs to the technical field of garbage disposal, and the method comprises the following steps: carrying out three-dimensional tomography scanning on a garbage transport vehicle entering a plant area to obtain first characteristic data of garbage; image acquisition is carried out in the garbage dumping process to obtain second feature data of the garbage; according to the first feature data and the second feature data, identifying the type of garbage in the garbage transport vehicle; the garbage types comprise a first type of forbidden garbage, a second forbidden garbage and suspicious garbage; and if it is determined that any one of the first type of forbidden garbage and the second type of forbidden garbage exists, preset treatment measures are executed to prevent the forbidden garbage from entering the incineration process. According to the invention, the garbage identification accuracy is improved, and the whole-process intelligent supervision of the garbage entering the factory from the entrance to dumping is realized.

A method and a system for image-guided intervention such as a percutaneous treatment or diagnosis of a patient may include at least one of a pre-registration method and a re-registration method. The pre-registration method is configured to permit for an efficient virtual representation of a planned trajectory to target tissue during the intervention, for example, as a holographic light ray shown through an augmented reality system. In turn, this allows the operator to align a physical instrument such as a medical probe for the intervention. The re-registration method is configured to adjust for inaccuracy in the virtual representation generated by the pre-registration method, as determined by live imaging of the patient during the intervention. The re-registration method may employ the use of intersectional contour lines to define the target tissue as viewed through the augmented reality system, which permits for an unobstructed view of the target tissue for the intervention.