95 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.

Disclosed in the present application are an HCT prediction method and system, a device, and a medium. Photons in a photon group are emitted into an extracorporeal circulation blood model so that the photons are reflected, scattered, or absorbed during movement. The extracorporeal circulation blood model is a model constructed on the basis of the thickness of an extracorporeal circulation tube, the thickness of the blood, and the distance from a light source generator to a detector. Light intensity data corresponding to photons reaching the detector are acquired. The acquired light intensity data are input into a prediction model to obtain a hematocrit (HCT) prediction value. The prediction model is a model constructed on the basis of a BP neural network and the relationship between light intensity and HCT. The prediction model combining simulation and neural network increases the data volume, achieves continuous non-invasive estimation of HCT by means of algorithm model optimization, and improves the accuracy of HCT prediction.

The application provides a photomultiplier tube and a detector. The photomultiplier tube comprises: a photocathode configured to receive photons and emit photoelectrons based on the received photons; a photomultiplication system located downstream of the photocathode and arranged around a target axis, the target axis coinciding with or being parallel to a central axis of the photomultiplier tube, the photomultiplication system configured to receive the photoelectrons emitted by the photocathode and multiply the photoelectrons; and an anode configured to collect the photoelectrons multiplied by the photomultiplication system and output an anode current based on the collected photoelectrons. According to the embodiments of the application, the carrying capacity of each stage of the multiplication electrode is increased, thereby improving the pulse width response range of the photomultiplier tube and the linear current of the photomultiplier tube.

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.

The present invention relates to a method and an apparatus for attenuation correction of myocardial perfusion single-photon emission computed tomography (MPS) image data, the method comprising the steps of: receiving multiple pieces of MPS image data; generating a data set including a first set and a second set by using the MPS image data; applying multiple pieces of image data included in the data set to a deep learning algorithm using multiple loss functions so as to train the deep learning algorithm; generating attenuation-corrected (generated attenuation-corrected (GEN AC )) image data by applying the multiple pieces of image data and the MPS image data to the trained deep learning algorithm; and evaluating the clinical applicability of the generated attenuation-corrected image data. The present invention can also be applied to other embodiments.

The invention relates to a method for the temporal synchronization of detection events of two receivers for quantum communication, preferably for quantum key exchange (QKD), comprising the generation of entangled photon pairs in a source, transmission of one individual photon of each entangled photon pair to each receiver, detection of the individual photons at each receiver and storage of the detection events, and the temporal synchronization of the detection events of the two receivers, preferably for quantum key exchange (QKD). Essentially, during the generation of the entangled photon pairs for the temporal synchronization of the detection events of the two receivers, the emission rate of the individual photons of the entangled photon pairs in the source is changed over a time interval Δtmod, and the change in the emission rate of the individual photons is detected at both receivers for the purpose of synchronizing the detection events.

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.

The invention discloses a mechanoluminescence efficiency testing device and method based on an integrating sphere, and the device comprises a standard light source which is used for generating a standard light signal; the integrating sphere is used for collecting optical signals generated by the standard light source and the test sample; the test sample is an elastic film with mechanoluminescence performance, and mechanoluminescence is realized through stretching; the optical fiber spectrometer is used for converting an optical signal output from the integrating sphere into a digital signal; the mechanical load applying device is used for applying tensile acting force to the test sample, so that the test sample is deformed to generate photon emission; in the first working state, the standard light source is arranged in front of the integrating sphere; in the second working state, the standard light source is removed, the test sample is tightly attached right in front of the light inlet hole of the integrating sphere, and the mechanical load applying device is used for applying tensile acting force to the test sample. The mechanoluminescence efficiency testing device and the mechanoluminescence efficiency testing method provided by the invention have universality, and are applicable to different mechanoluminescence materials with stretchability.

A computer system and method for providing single-photon emission tomography (SPECT) uptake data. A processor of the computer system is caused to receive SPECT data obtained from a SPECT acquisition, and quantify regional activity uptake of at least one isotope of a plurality of isotopes.

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.

A frequency-tunable coupler (130) couples first and second quantum systems (110, 120), the coupler (130) and the second quantum system (120) being arranged so that tuning the coupler (130) to the second quantum system (120) forms a hybridized mode with a symmetric state and an asymmetric state, coupled to a waveguide (140) The coupler (130) is driven with an excitation-preserving transition signal to transfer a first excited state of the first quantum system (110) to the asymmetric state of the hybridized mode, thereby emitting a photon encoded with a first part of a quantum state into the waveguide at a first frequency. The first quantum system (110) is simultaneously driven with a non-excitation-preserving transition signal to transfer a second excited state of the first quantum system (110) to the symmetric state of the hybridized mode, thereby emitting a second photon encoded with a second part of the quantum state, at a second frequency.

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.

This specification discloses devices, methods for manufacturing the same, and methods for using the same. For example, this specification discloses a device comprising a first contact layer, a semiconductor layer comprising a semiconductor material having a first bandgap, and a dielectric layer comprising a dielectric material, wherein the first contact layer is located on and in physical contact with the dielectric layer, and the dielectric layer is located on and in physical contact with the semiconductor layer, thereby sandwiching the dielectric layer between both the first contact layer and the semiconductor layer and being in physical contact with both, and the dielectric layer suppresses the photon emission of carriers between the first contact layer and the semiconductor layer under incident light. This specification also discloses methods for using any of the devices disclosed herein. In some examples, the methods include using the device as a solar blind photodetector.

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.

To provide a method for testing a semiconductor sensor of a gamma camera.SOLUTION: In order to test or manufacture a semiconductor-based detector in SPECT, an interposer 106, such as an elastomer device with a conductor, is sandwiched between a carrier and a semiconductor detector, the conductor enables temporary, separate connection of a detector electrode to a signal processing circuit, to test the detector operating using the signal processing circuit, and the interposer 106 provides separate electrical connection for testing.SELECTED DRAWING: Figure 1

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.

The invention belongs to the technical field of optical systems, and discloses a coaxial optical system for transmitting and receiving trace photons. The device comprises a first doublet achromatic lens, a first single lens, a first optical fiber collimator, a second doublet achromatic lens, a second single lens, a third single lens, a fourth single lens, a first optical fiber jumper, a first optical fiber beam combiner and a first optical fiber filter which are coaxially arranged from front to back. A reflection port of the first optical fiber circulator is connected with the optical fiber collimator through a single-mode optical fiber, and an emergent port of the first optical fiber circulator is connected with one incident port of the first optical fiber beam combiner. According to the invention, a receiving and transmitting coaxial optical system is adopted, the consistency of deflection angles of two light paths is ensured, and the device can adapt to detection of targets at different distances under the condition that the receiving and transmitting optical axis angle is not adjusted.

A method for aligning a pulsed laser beam in microscopy may include directing a first pulsed photon beam toward a target, directing a charged particle beam towards the target, determining a diffraction pattern resulting from an interaction of the charged particle beam with the target, directing a second pulsed photon beam towards the target, and determining a deviation of the diffraction pattern based at least in part on the second pulsed photon beam. In some embodiments, the method may include controlling, based at least in part on the deviation, a direction of pulsed photon emission by a light source, directing a third pulsed photon beam toward the target, generating detector data based at least in part on charged particles that result from a second interaction with the target and the third pulsed photon beam, and determining a position of the third pulsed photon beam, relative to the charged particle beam using the detector data.

The invention discloses a method and system for monitoring the sputtering yield of a material in real time, and belongs to the technical field of interaction of plasmas and materials. The method comprises the following steps: generating and guiding a plasma beam to continuously bombard the surface of a to-be-tested material by using a plasma generating device; collecting characteristic optical emission spectral line intensity data of specific atoms generated by sputtering on the surface of the to-be-detected material in real time; acquiring plasma ion saturation current data for bombarding the surface of the to-be-detected material in real time; based on the characteristic optical emission spectral line intensity data and the photon emission efficiency, the sputtering particle flow density of specific atoms is calculated in real time; calculating the plasma ion flux density in real time based on the plasma ion saturation current data and the effective collection area of the probe; and calculating and outputting the sputtering yield in real time according to the ratio of the sputtering particle flow density to the plasma ion flux density. According to the embodiment of the invention, the sputtering yield generated by the material can be monitored in real time, and the accuracy of the obtained sputtering yield is effectively improved.

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).

The present invention relates to the preparation of a novel tetradentate platinum (II) complex and an application thereof, belonging to the field of OLED organic electroluminescent materials. The complex of the present invention has the following structural formula, and is used for a phosphorescent doping material having a photon emission effect in a light-emitting layer of an OLED luminescent device. The complex of the present invention has a high fluorescence quantum efficiency, a good heat stability and a low quenching constant, and can be used for the manufacture of a green light OLED device with a high luminous efficiency and low roll-off.

An integrated transmitter chip having a transmitter block, the transmitter block having: a first power divider optically connected to a first input port; a second power divider optically connected to a second input port; a first plurality of optical channels optically branched from the first power divider; a second plurality of optical channels optically branched from the second power divider; a first multiplexer optically connected to a first optical channel of the first plurality of optical channels and a first optical channel of the second plurality of optical channels, and a second multiplexer optically connected to a second optical channel of the first plurality of optical channels and a second optical channel of the second plurality of optical channels. The integrated transmitter chip may be configured to utilize polarization division multiplexing or wavelength division multiplexing to combine optical signals depending on the application of the corresponding integrated transmitter chip.

A method and system for time transfer between a first clock and a second clock. The system for time transfer comprises an entangled photon transmitter, a first photon receiver, and a second photon receiver. In the first embodiment, the entangled photon transmitter is located separate from the first photon receiver, and the second photon receiver. In the second embodiment, the second photon receiver is located separate from the entangled photon transmitter and the first photon receiver. The entangled photon transmitter and the first photon receiver are co-located. In the third embodiment, the second photon receiver and the entangled photon transmitter are located separate from the first photon receiver.

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.

The invention is suitable for the technical field of medical images, and provides a correction method and device for a single photon emission type computed tomography image, electronic equipment and a storage medium, and the method comprises the steps: obtaining a training sample set which comprises a plurality of training samples, each training sample comprises an uncorrected SPECT image, a CT image registered with the uncorrected SPECT image, an attenuation image obtained by converting the CT image, and a corrected SPECT image obtained by performing attenuation correction on the uncorrected SPECT image by using the attenuation image; the training sample set is used for training a first correction network and a first generation network, the first correction network is used for generating a corrected SPECT image according to the input uncorrected SPECT image, and the second generation network is used for generating a target image according to the input corrected SPECT image; and performing iterative cascade fine tuning on the trained first correction network and the first generation network by using the training sample set to obtain a second correction network and a second generation network.

The present invention relates to a method and system for measuring the radiant power and emissivity of nonthermal far-infrared (FIR) radiation emitted from the surface of an FIR-photon-emitting specimen, specifically within the 3-16 μm wavelength range. This method and system include at least a test specimen, a reference material, an infrared imaging device, and a processing apparatus configured to execute a set of instructions. These instructions facilitate operations such as capturing thermal images of the test specimen and reference material, computing their grayscale values, and generating results that reveal the radiant power and emissivity of the test specimen, characteristics that would otherwise remain undetectable and imperceptible.