56 results about "Photon emission" patented technology

The present disclosure relates to the field of nuclear imaging and therapy, and more specifically to high purity copper radiotracer compositions useful in imaging, such as positron emission tomography (PET) and single-photon emission computerized tomography (SPECT), and therapy. More specifically, the present disclosure relates to novel compositions useful in imaging and treatment of conditions such as prostate cancer, somatostatin receptor-expressing tumors, like neuroendocrine tumor, epithelial tumors, as well as to methods wherein such compositions are prepared.

The invention belongs to the technical field of inorganic scintillator materials, and particularly relates to a multi-element co-doped yttrium lutetium silicate scintillator and a preparation method and application thereof, and the material has excellent comprehensive performance of high light output, short decay time, high radiation hardness, high matching degree of emission spectrum and novel photoelectric sensors and the like. The invention further relates to a preparation method of the scintillator material and application of the scintillator material in radiation detection fields such as positron emission tomography (PET), time flight PET (TOF-PET), interaction depth PET (DOI-PET), single photon emission computed tomography (SPECT), high-energy physical experiments, nuclear medicine imaging, industrial nondestructive inspection, safety detection (such as luggage and cargo container inspection) and the like.

The disclosure concerns a method for manufacturing a photon emitter for the emission of photons including at least one insulator layer, one thin film layer and at least one waveguide positioned in the thin film layer, with the following method steps: providing the insulator layer; providing the thin film layer including a predetermined thin film layer thickness; positioning of the thin film layer on the insulator layer, such that the thin film layer lies flat on the insulator layer; determining a waveguide width of the minimum of one waveguide in the thin film layer, wherein the waveguide width is selected according to the predetermined thin film layer thickness such that the photons exhibit a predetermined property; generating the minimum of one waveguide in the thin film layer, wherein the waveguide exhibits the specific waveguide width.

Methods and systems are provided for calibrating a single photon emission computed tomography (SPECT) imaging system. In one example, a collimated line source for calibrating a SPECT system comprises a radioactive material aligned along a central axis of the collimated line source and a plurality of collimator plates arranged perpendicularly around the central axis, the collimator plates including a material that substantially absorbs photons striking the collimator plates. The collimator plates may absorb photons emitted by the radioactive material in non-perpendicular directions, which are not used for calibrating the SPECT imaging system, thereby reducing an amount of radiation released in an environment of the SPECT imaging system during calibration. Due to the reduced amount of radiation to which people in the environment are exposed, short time increments between patient examinations may be advantageously used to collect calibration data, reducing an overall amount of time used for calibration.

A quantum computing system, method and computer readable medium involve a vacuum enclosure for sustaining a vacuum below 10−3 millibar, an optical resonator tuned to a resonance of an atom, and a trapping laser for maintaining the atom within a mode of the optical resonator. An atom excitation laser induces emissions of photons, at least one of a plurality of waveguides couples the photons to or from the optical resonator, and a detector associated with at least one of the plurality of waveguides detects at least some of the emitted photons. A processor controls optical switches for switching between two or more of the plurality of waveguides.

The present invention provides a closed loop generation and / or infusion system comprising a radionuclide generator, an activity detector, a controller, a dose calibrator, a pump, eluant source and an automated elution system controlled by software and hardware for generation and infusion of a radionuclide for administering a dose of generated radionuclide into a subject for diagnosing a peripheral arterial disease in a subject suffering from or suspected of suffering from peripheral arterial disease and / or metabolic disease via Positron Emitting Tomography (PET) or Single-photon emission computed tomography (SPECT) imaging technologies. More particularly, the present invention provides methods of determining whether a subject is suffering or at a risk of developing a peripheral arterial disease by performing quantitative assessment of blood flow in lower extremities or limbs of the subject; wherein the quantitative assessment is performed by analyzing one or more images and providing a severity score; and wherein the analysis of the one or more images is performed by using an automated system.

The invention discloses a strong pumping bilateral resonance modulation-demodulation magnetic sensitivity enhancement method of a quantum magnetic compass. The method comprises the following steps: constructing a quantum magnetic compass platform comprising a sensing unit and external optical and microelectronic devices; quantum state enhanced reading containing magnetic vector information is realized by using a pumping enhancement mode; a standard diamond is used, the thermal conductivity and the light transmission of the diamond are utilized, the initialization of a quantum state is realized by using near-saturation external pump light, the line width is narrowed, and the magnetic measurement sensitivity is improved; noise in the environment is filtered out in a modulation and demodulation mode, and high-robustness extraction of quantum information is achieved. By enhancing the laser pumping power, the emission speed of the solid-state quantum color center ensemble fluorescence photons is increased, the full width at half maximum of a magnetic resonance curve is compressed, and the measuring capacity of the solid-state quantum color center to a magnetic field is improved; accurate measurement of external magnetic field signals through the solid quantum color center in the diamond is realized.

A system for low-count quantitative single-photon emission computed tomography (LC-QSPECT) is provided. The system is programmed to a) store a computer tomography (CT) scan of a subject being examining including a plurality of defined volumes of interest (VOIs) of the subject being examined; b) model a system matrix based on the stored CT, wherein the model describes the probability that photons emitted from each of the defined VOIs are detected in different projection bins, wherein a plurality of projection bins are defined around the subject and the defined VOIs; c) adjust the model with analysis of stray-radiation noise around the subject; d) detect, by the one or more sensors, one or more photons being emitted by an alpha-particle-emitting isotope; and e) execute the adjusted model with the one or more detected photons as inputs to determine a source VOI of the detected photons.

Disclosed are electrically driven single-photon emitters and their fabrication methods. The single-photon emitter comprises a substrate, an active layer on the substrate, a spacer between the substrate and the active layer, a first electrode connected to the active layer, and a second electrode between the substrate and the spacer and vertically spaced apart from the active layer across the spacer. The substrate includes a deformable polymer. The substrate has a first dent where a portion of a top surface of the substrate is concavely recessed. The active layer has a second dent at a position which is aligned with the first dent and where a portion of a top surface of the active layer is concavely recessed.

One method includes capturing a photon emission microscopy (PEM) image of an integrated circuit (IC) and identifying emission sites in the PEM image, where emission sites are associated with leakage current. A set of common networks connecting multiple emission sites is located using layout data and / or netlist data from computer-aided design (CAD) data. A critical network connecting a threshold number of emission sites is identified from this set of common networks based on the layout data and / or netlist data. The critical network is cross-mapped by a processor to netlist data in the CAD data. A specific device with output pins connected to the critical network is identified based on the netlist data. The specific device identified based on the netlist data is cross-mapped by the processor to layout data, where the critical network connects at least two devices, including the specific device, at the identified emission sites.

The application provides a polarization single photon source based on an anisotropic Dirac cavity, and relates to the technical field of solid-state single photon sources.The polarization single photon source based on the anisotropic Dirac cavity comprises: an anisotropic Dirac microcavity, which comprises: a C6 symmetry broken cavity photonic crystal located on the inside; a C6 symmetry cladding photonic crystal surrounding the outside of the C6 symmetry broken cavity photonic crystal; and a quantum dot coupled with the anisotropic Dirac microcavity to realize the deterministic emission of linearly polarized single photons.In the application, a single InAs / GaAs quantum dot is coupled with an anisotropic Dirac photonic crystal microcavity, the polarization selection Purcell enhancement effect of the microcavity is utilized, the deterministic single photon emission with high linear polarization degree and high single photon purity is realized, and the application can be used as a core quantum bit carrier in the fields of quantum communication, quantum calculation and quantum precision measurement.

A quantum communication system (1) has an entangled photon transmitter (2) with a source which is configured to generate at least one pair of entangled photons. The pair of entangled photons has a first photon (P1) emitted on a first propagation path (D1) and a second photon (P2) emitted on a second propagation path (D2). A first receiver (3) is arranged on the first propagation path (D1) and has a first instrument (35), which is arranged to absorb the first photon in one of two complementary polarisations, and an optical selector (30), which is configured either to allow the first photon to pass towards the first measuring instrument (35) or to prevent it from being measured. A second receiver (4) is arranged on the second propagation path (D2) and has an optical amplifier (40), which makes it possible to demultiply the second photon while maintaining its polarisation, and a measuring instrument (45), which makes it possible to measure the average quantum state of the demultiplied photons (P20).

A system for generating photon emission from atomic nuclei includes a device for generating phonons, and a condensed matter medium comprising atomic nuclei. The phonons interact with the atomic nuclei and affect nuclear states of some of the atomic nuclei by transferring energy to the nuclei and causing the nuclei to emit photons. The condensed matter medium includes excited Fe-57* nuclei and ground state Fe-57 nuclei, and the device for generating phonons comprises one of laser irradiation, electric current, diffusion of solutes in solid solutions, or particle beam bombardment.

Apparatus for measuring tissue health and methods of use. The device includes a plurality of sensors for detecting events related to positron decay emitted from drug radionuclides in tissue, and a processor. The processor measures a first count rate indicative of a three-photon emission associated with a positron first decay mode; measuring a second count rate indicative of two-photon emission associated with a positron second decay mode; applying a scatter correction factor to each of the first count rate and the second count rate to account for scattered and attenuated annihilation photons in the tissue; determining a ratio of the first count rate to the second count rate; determining the decay lifetime of the positive-positron element (o-Ps) based on the ratio; and determining the health condition of the tissue based on the decay life of the o-Ps.

The invention discloses an atmospheric radiation transmission signal reconstruction method, and belongs to the technical field of atmospheric optical transmission. The method comprises the following steps: constructing an atmospheric radiation transfer Monte Carlo model, and simulating photon emission, transmission, scattering and absorption processes; extracting a time broadening function h (t) through simulation under the condition of no modulation signal, and defining the time broadening function h (t) as a time point spread function of an atmospheric channel; based on the fitted error model and the time model, the optimal photon packet number N for simulation is efficiently determined by using a Bayesian optimization algorithm; and finally, realizing accurate reconstruction of the received signal y (t) by using convolution operation of the time broadening function h (t) and the original signal S (t). According to the method, the Monte Carlo simulation parameters are intelligently optimized, the calculation cost is remarkably reduced on the premise that the precision is guaranteed, and an efficient technical scheme is provided for rapid signal reconstruction in remote sensing detection and laser communication.

The utility model relates to a single photon emission tomography device. The single photon emission tomography device comprises a rack; the first probe module comprises a first driving mechanism, a first rotary table and a first probe, the first rotary table is rotationally connected to the rack, and the first probe is connected to the first rotary table; the second probe module comprises a second rotary table and a second probe, the second rotary table is rotationally connected to the rack, and the second probe is connected to the second rotary table; the first driving mechanism is used for driving the first probe to move in the first direction, the second direction and the third direction and is used for driving the first rotary table to rotate around the axial direction of the rack, any two of the first direction, the second direction and the third direction are perpendicular, and one of the directions is the axial direction of the rack. The single photon emission tomography equipment can have a larger axial scanning visual field, so that the scanning requirement of a larger axial size is met, the number of times of moving a sickbed in the scanning process is reduced, the scanning process is simplified, and the scanning time is shortened.

The invention provides a bulwark armor block health monitoring method and platform, and relates to the technical field of structure health monitoring. The method comprises the following steps: generating entangled photon pairs comprising detection photons and reference photons based on a quantum entangled photon source; the detection photons are emitted into the armor block and interact with one another; receiving a returned quantum signal; performing quantum interference measurement based on the returned quantum signal and the reference photon to obtain quantum interference data; reconstructing an internal structure image of the armor block through a quantum state tomography algorithm based on the quantum interference data; and identifying defect types and positions based on the internal structure images. According to the invention, the quantum entanglement and interference technology is utilized, high-resolution and high-precision nondestructive detection and intelligent defect identification of the internal structure of the armor block are realized, and the monitoring depth, accuracy and anti-interference capability are effectively improved.

1. The name of the design product: digital single photon emission computed tomography imaging device. 2. The use of the design product: CT scan imaging for small animals. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The present invention relates to a vehicle lighting device (1), comprising: - at least one photon emitter (3); - a control unit (2) for controlling the photon emitter (3), the control unit (2) capable of applying a voltage pulse to bias the photon emitter (3) at a first frequency; - a liquid crystal film (4) capable of transmitting or blocking light emitted by the photon emitter (3); and - an AC voltage (V) applied to the film (4) at a second frequency. AC The lighting device (1) is equipped with a control means (5) capable of applying an AC voltage (V) applied to the film (4). AC The present invention relates to a vehicle lighting device (1) characterized by comprising means for synchronizing a photon emitter (3) with a voltage pulse applied to the photon emitter (3).

Systems and methods for generating synthetic computed tomography (CT) images, such as generating synthetic time-resolved four-dimensional CT or single-photon emission CT images of the human respiratory system, are described. Generating a synthetic CT image includes processing at least one output from a physics-based lung simulation model in combination with at least one generative learning model. The output from the physics-based lung simulation model provides additional information that improves clinical decision-making without additional patient exposure to radiation-intensive imaging procedures.

An optically pumped solid state laser (OPSL) module is disclosed. A submount unit is provided having raised wedged portion(s) to accommodate at least one gallium and nitrogen (GaN) containing pump laser diode. The at least one GaN pump laser diode is mounted on a wedge such that the light emission points at a downward angle, through beam shaping optics, and onto a GaN gain chip that is placed on a centerpiece platform representing a space between the lower portion of the one or more wedged portion(s). The gain chip is made of a series of spacer and active regions, all epitaxially formed, so that upon pumping from the pump laser diode(s), there is photonic emission from the gain chip. The gain chip spacer and active regions are selected based upon the desired wavelength output. Each active region may be spaced apart based on a half-wavelength metric.

This application discloses a two-photon luminescent micro / nanomaterial, its preparation method, and its application. The two-photon luminescent micro / nanomaterial has the chemical formula shown in Formula I: [(Hdma)K(H2L)] n Formula I; wherein Hdma is a dimethylamine countercation, and H2L is a semi-deprotonated tetraphenylvinylcarboxylic acid ligand. The micro / nano luminescent material has a particle size distribution of 200 nm to 200 μm, exhibiting strong blue fluorescence and a strong two-photon emission effect. Compared with currently commercialized fingerprint recognition technologies, the two-photon luminescent micro / nano material described in this application has advantages such as faster response speed, higher resolution, stronger three-dimensional tomography capability, and greater imaging depth, making it of significant commercial application value in fields such as national defense security, financial security, and criminal investigation.

Methods of fabricating single photon emitters (SPEs) including nanoindentation of hexagonal boron nitride (hBN) host materials and annealing thereof, devices formed from such methods, and chips with a single photon emitter. A substrate with a layer of hBN is provided. Nanoindentation is performed on the layer of hBN to produce an array of sub-micron indentations in the layer of hBN. The layer of hBN is annealed to activate SPEs near the indentations. Devices include a substrate with an SPE produced in accordance with the methods. Chips include a substrate, an hBN layer, and an SPE including an indentation on the hBN layer, in which the substrate is not damaged at the indentation.

A computer-implemented method is provided for improving image quality. The method comprises: acquiring, using single-photon emission computed tomography (SPECT), a medical image of a subject, wherein the medical image is acquired with shortened acquisition time; and applying a deep learning network model to the medical image to generate an enhanced medical image.

This invention provides a Pr-based 3+ Single-doped Pr 3+ / Gd 3+ This invention relates to co-doped ultraviolet upconversion multifunctional materials and their preparation methods, belonging to the field of materials technology. The doping and matrix materials of this invention include silicates and phosphates. The general chemical formula for phosphate-based materials is M0. a Ln(PO4) b xPr 3+ yGd 3+ The general chemical formula for silicates is Ca2Al2SiO7:Pr 3+ / Gd 3+ Ba2Y3(SiO4)3F:Pr 3+ / Gd 3+ and BaY2Si3O 10 :Pr 3+ / Gd 3+ Both types of materials can be prepared via high-temperature solid-state reaction and co-precipitation. These materials can absorb visible photons such as blue and yellow light, and achieve high-energy photon emission in the ultraviolet C and ultraviolet B bands by transmitting blue light or blue + yellow light through a multi-photon upconversion process. This is based on the excellent ultraviolet C and ultraviolet B upconversion luminescence properties of these materials and Pr 3+ Gd 3+ The energy level structure of activator ions can be applied to fields such as fluorescent labeling, food safety, environmental protection, and medical health.

The present disclosure relates to the field of nuclear imaging and therapy, and more specifically to high purity copper radiotracer compositions useful in imaging, such as positron emission tomography (PET) and single-photon emission computerized tomography (SPECT), and therapy. More specifically, the present disclosure relates to novel compositions useful in imaging and treatment of conditions such as prostate cancer, somatostatin receptor-expressing tumors, like neuroendocrine tumor, epithelial tumors, as well as to methods wherein such compositions are prepared.

The present invention relates to a signal indication and obstacle detection system for a vehicle, the signal indication and obstacle detection system comprising: a photon emitter located on the front of the vehicle; means for emitting a high-frequency coded light signal (s1) toward the exterior of the vehicle; and means for receiving a reflected high-frequency coded light signal from the exterior of the vehicle, the receiving means being coupled to an obstacle detection device of the vehicle. The signal indication and detection system includes a driving unit for supplying a low-frequency voltage (PWM15) to a first subset of the photon emitters to emit signal indication light, and the emitting means includes a control unit for supplying a high-frequency voltage to a second subset of the photon emitters to generate a high-frequency coded light signal (s1).

Systems and methods for generating synthetic computed tomography (CT) images, such as generating synthetic time-resolved four-dimensional CT or single-photon emission CT images of the human respiratory system, are described. Generating a synthetic CT image includes processing at least one output from a physics-based lung simulation model in combination with at least one generative learning model. The output from the physics-based lung simulation model provides additional information that improves clinical decision-making without additional patient exposure to radiation-intensive imaging procedures.

The phase contrast imaging simulation method comprises the steps that a light source, an imaged object, an object plane and an image plane are sequentially arranged in a simulation environment in the photon emission direction, and the object plane is divided into a plurality of object plane sub-areas; the interaction between the photons and the imaged object in the process of penetrating through the imaged object is simulated; for each object plane sub-region in the plurality of object plane sub-regions, determining the energy and phase distribution of a wave surface corresponding to the object plane sub-region based on the energy and phase of all photons penetrating through the imaged object to reach the object plane sub-region; based on the energy and phase distribution of each wave surface corresponding to each object plane sub-region, determining the energy distribution of all wave surfaces reaching the image plane; and generating a simulated image of the imaged object based on the energy distribution from the wave surfaces corresponding to the plurality of object plane sub-regions to the image plane. According to the invention, while phase contrast imaging is accurately simulated, time and computing resources required by simulation operation can be reduced.

The present disclosure provides single-walled carbon nanotubes (SWCNTs) covalently functionalized with a plurality of molecules derived from monomers (e.g., acrylate monomers, acrylamide monomers, and styrene monomers), alcohols, amines, amino acids, alkyls, heteroaromatics, aryls, or carboxylic acids, and methods for preparing the same via Fenton-like reactions. The functionalized SWCNTs of the present technology may be useful as near-infrared single-photon emitters, optical sensors, and as fluorophores for bioimaging and super-resolution microscopy.