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1547 results about "Radiation imaging" patented technology
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The radiation used in medical imaging is a valuable tool to screen for, diagnose and treat numerous medical conditions. As new technologies increase the use of radiation, there is increased attention to avoid over exposure and any associated risks.
Slit and slot scan, SAR, and compton devices and systems for radiation imaging
ActiveUS20100270462A1Reduce productionReduce maintenance costsElectric discharge tubesElectroluminescent light sourcesHigh energyGas detector
The invention provides methods and apparatus for detecting radiation including x-ray photon (including gamma ray photon) and particle radiation for radiographic imaging (including conventional CT and radiation therapy portal and CT), nuclear medicine, material composition analysis, container inspection, mine detection, remediation, high energy physics, and astronomy. This invention provides novel face-on, edge-on, edge-on sub-aperture resolution (SAR), and face-on SAR scintillator detectors, designs and systems for enhanced slit and slot scan radiographic imaging suitable for medical, industrial, Homeland Security, and scientific applications. Some of these detector designs are readily extended for use as area detectors, including cross-coupled arrays, gas detectors, and Compton gamma cameras. Energy integration, photon counting, and limited energy resolution readout capabilities are described. Continuous slit and slot designs as well as sub-slit and sub-slot geometries are described, permitting the use of modular detectors.
Owner:MINNESOTA IMAGING & ENG
Radioimaging
ActiveUS20080042067A1Unprecedented sensitivityAvoid saturationHandling using diaphragms/collimetersMaterial analysis by optical meansNuclear medicineRadioactive drug
Owner:SPECTRUM DYNAMICS MEDICAL LTD
Telemetrically controlled band for regulating functioning of a body organ or duct, and methods of making, implantation and use
ActiveUS20050143766A1Accurate degreeDesired level of constrictionNon-surgical orthopedic devicesObesity treatmentBody organsRadiation imaging
Apparatus and methods are provided comprising an implantable non-hydraulic ring that encircles and provides a controllable degree of constriction to an organ or duct and an external control that powers and controls operation of the ring. The ring includes a rigid dorsal periphery that maintains a constant exterior diameter, and a compliant constriction system that reduces intolerance phenomena. A high precision, energy efficient mechanical actuator is employed that is telemetrically powered and controlled, and maintains the ring at a selected diameter when the device is unpowered, even for extended periods. The actuator provides a reversible degree of constriction of the organ or duct, which is readily ascertainable without the need for radiographic imaging. Methods of use and implantation also are provided.
Owner:APOLLO ENDOSURGERY INC
Radiation imaging device
InactiveUS8787520B2Promote generationHigh degreeReconstruction from projectionMaterial analysis using wave/particle radiationSoft x rayImaging quality
Owner:HITACHI LTD
Beam-oriented pixellated scintillators for radiation imaging
ActiveUS7692156B1Improved performance characteristicsImprove spatial resolutionSolid-state devicesMaterial analysis by optical meansHigh resolution imagingImage resolution
The present invention provides radiation detectors and methods, including radiation detection devices having beam-oriented scintillators capable of high-performance, high resolution imaging, methods of fabricating scintillators, and methods of radiation detection. A radiation detection device includes a beam-oriented pixellated scintillator disposed on a substrate, the scintillator having a first pixel having a first pixel axis and a second pixel having a second pixel axis, wherein the first and second axes are at an angle relative to each other, and wherein each axis is substantially parallel to a predetermined beam direction for illuminating the corresponding pixel.
Owner:RADIATION MONITORING DEVICES
Radiation imaging apparatus, system and method as well as program
InactiveUS20070125952A1Avoid it happening againSimple configurationTelevision system detailsMaterial analysis by optical meansSignal processing circuitsX-ray
An object hereof is to restrain occurrence of artifact in an acquired radiation image with comparatively simple configuration without providing wiring between a radiation source and a radiation imaging apparatus to thereby obtain a radiation image with extremely good quality. Therefore, a controller selectively carries out real read operation of reading an electric signal obtained by activating a drive circuit from a signal processing circuit unit in case of detecting X-ray irradiation with an X-ray detecting circuit and dummy read operation of reading an electric signal obtained by activating a drive circuit from a signal processing circuit unit in case of detecting X-ray non-irradiation with an X-ray detecting circuit; discontinues the dummy read operation at the time of detecting the start of X-ray irradiation with the X-ray detecting unit in dummy read operation; and starts real read operation at the time of detecting the finish of X-ray irradiation with the X-ray detecting unit.
Owner:CANON KK
Radiation imaging apparatus, radiation imaging system, and radiation imaging method
InactiveUS6952464B2Detection ratio can be improvedAdd partsTelevision system detailsSolid-state devicesRadiation imagingElectric signal
A radiation imaging apparatus includes a radiation detecting unit and an image-display controlling unit. The radiation detecting unit has radiation detectors, arranged in a two-dimensional array, for detecting radiation transmitted through an object as electrical signals. The image-display controlling unit radiographs radiation images of the object, detected as the electrical signals by the radiation detecting unit, at a predetermined frame rate as continuous images in a plurality of frames and displays a processed image given by subtracting an m-th image from an (m+1)-th image in synchronous with either the m-th image or the (m+1)-th image that does not undergo the subtraction in a display, where m is a natural number.
Owner:CANON KK
Radiation imaging apparatus and control method therefor
InactiveUS20050220269A1Stably performing radiographyAvoid delayX-ray apparatusRadiation diagnosticsX-rayOpto electronic
A lamp emits pulse-shaped visible light when a wait period begins. If a radiation emission switch is not pressed in the wait period, X-ray radiation is not emitted from an X-ray source, and no charges are accumulated in photoelectric conversion elements of an X-ray imaging apparatus. In a non-read period, although signals are sequentially read from the photoelectric conversion elements, an output signal does not change. When the radiation emission switch is pressed in synchronization with a radiation-induced signal in a certain wait period, the X-ray source emits X-rays. After irradiation of X-rays, a photoelectric conversion period transitions to an actual read period. In the photoelectric conversion period, X-rays are emitted and transmitted X-ray information of a patient are accumulated in the photoelectric conversion elements of the X-ray imaging apparatus. In the actual read period, the accumulated information is read.
Owner:CANON KK
Radioimaging using low dose isotope
ActiveUS20140163368A1Unprecedented sensitivityAvoid saturationUltrasonic/sonic/infrasonic diagnosticsIn-vivo radioactive preparationsRadiation imagingNuclear medicine
Owner:SPECTRUM DYNAMICS MEDICAL LTD
Radiation imaging apparatus and radiation imaging system
InactiveUS20070210258A1More time consumingReduce yieldTelevision system detailsSolid-state devicesRadiation imagingElectric signal
A radiation imaging apparatus comprises a read unit reading the electric signal in the radiation detecting elements in a radiation detecting unit comprises the radiation detecting elements converting incident radiation into electric signals arranged two-dimensionally, a control unit controlling the radiation detecting unit with such that a first radiation detecting element group is made senseless state and a second radiation detecting element group is made sensible state, and a signal processing unit performing a subtraction processing such that the electric signal in the radiation detecting elements made senseless state read by the read unit is subtracted from the electric signal in the radiation detecting elements made sensible state read by the read unit according to the state control by the control unit, to reduce conspicuous line noise in an image by a relatively simple configuration.
Owner:CANON KK
Radiation imaging apparatus, radiation imaging system, and correction method
ActiveUS20070131843A1Accurate signalEliminate the effects ofTelevision system detailsPhotometry using reference valueRadiation imagingRadiography
The invention intends to be able to adequately perform a gain correction. Hence, at the time of radiographing an object, a gain correction of the object image is performed based on a gain correction image (XRc1) derived by performing a light reset. On the other hand, at the time of radiographing an object, when a light reset is not performed, a gain correction of the object image is performed based on a gain correction image (XRc2) derived without performing the light reset.
Owner:CANON KK
Radiation imaging apparatus and method for breast
InactiveUS8139712B2Accurate massAccurately calcificationMaterial analysis using wave/particle radiationRadiation/particle handlingImaging processingCalcification
Owner:FUJIFILM CORP
Diffraction grating and alignment method thereof, and radiation imaging system
InactiveUS20110243300A1Improve image qualityEasy to adjustImaging devicesHandling using diffraction/refraction/reflectionRadiation imagingX-ray
An X-ray imaging system includes first to third absorption gratings. Initially, the third absorption grating is disposed in a Z axis orthogonal to a detection surface of a FPD, and the position of the third absorption grating is adjusted in θx and θy directions based on a dose of X-rays having passed through the third absorption grating. Then, the first absorption grating is disposed in the Z axis so as to produce a moiré pattern. The position of the first absorption grating is adjusted in the θx and θy directions so that a frequency of the moiré pattern detected by the FPD becomes uniform. Then, the position of the first absorption grating is adjusted in a Z or θz direction so that the FPD loses the detection of the moiré pattern. After that, the second absorption grating is aligned in a like manner as the first absorption grating.
Owner:FUJIFILM CORP
Compton camera detector systems for novel integrated compton-Pet and CT-compton-Pet radiation imaging
The invention provides novel Compton camera detector designs and systems for enhanced radiographic imaging with integrated detector systems which incorporate Compton and nuclear medicine imaging, PET imaging and x-ray CT imaging capabilities. Compton camera detector designs employ one or more layers of detector modules comprised of edge-on or face-on detectors or a combination of edge-on and face-on detectors which may employ gas, scintillator, semiconductor, low temperature (such as Ge and superconductor) and structured detectors. Detectors may implement tracking capabilities and may operate in a non-coincidence or coincidence detection mode.
Owner:MINNESOTA IMAGING & ENG
Radioimaging
ActiveUS20080230702A1Avoid saturationLarge diameterMaterial analysis by optical meansDiagnostic recording/measuringRadioactive drugRadiation imaging
Owner:SPECTRUM DYNAMICS MEDICAL LTD
Low temperature, bump-bonded radiation imaging device
InactiveUS6933505B2Reliable and high yieldIncrease productionSolid-state devicesMaterial analysis by optical meansCMOSSoft x ray
An x-ray and gamma-ray radiant energy imaging device is disclosed having a temperature sensitive semiconductor detector substrate bump-bonded to a semiconductor CMOS readout substrate. The temperature sensitive, semiconductor detector substrate utilizes Tellurium compound materials, such as CdTe and CdZnTe. The bump bonds are formed of a low-temperature, lead-free binary solder alloy having a melting point between about 100° C. and about 180° C. Also described is a process for forming solder bumps utilizing the low-temperature, lead-free binary solder alloy, to prevent damage to temperature sensitive and potentially brittle detector substrate when assembling the imaging device.
Owner:OY AJAT LTD
Radiation imaging apparatus, radiation imaging system, and program
InactiveUS20070080299A1Accurate and high-S/N-ratio X-ray radiographic imageObtain goodSolid-state devicesMaterial analysis by optical meansX-rayRadiation imaging
It is made possible that, in accordance with a plurality of radiographing modes such as the still image radiographing mode and the moving image radiographing mode, the outputs both in the irradiation period and in the non-irradiation period are made to fall within the dynamic range of the radiographing system, whereby an accurate, high-S / N-ratio X-ray radiographic image is obtained. For that purpose, in accordance with the plurality of radiographing modes, an arithmetic operation unit adjusts a power source to control voltage to be applied to a reading circuit unit or an Analogue-Digital conversion unit, such that, in each of the radiographing modes, both an electric signal in the X-ray irradiation period and an electric signal in the X-ray non-irradiation period fall within the dynamic ranges of the reading circuit unit and the Analogue-Digital conversion unit.
Owner:CANON KK
Imaging apparatus, radiation imaging apparatus, and radiation imaging system
ActiveUS7408167B2Quality improvementLower capability requirementsTelevision system detailsSolid-state devicesRadiation imagingPhotoelectric conversion
An imaging apparatus capable of reducing a line noise artifact in a simple configuration without complicated operations includes: a plurality of pixels arranged in row and column directions and having a photoelectric conversion element and a switch element; a plurality of signal wirings connected to the plurality of switch elements in the column direction; a read out circuit connected to the plurality of signal wirings; and a power source for supplying a voltage to the photoelectric conversion element. With the configuration, the plurality of pixels are classified into a plurality of groups, and the power sources are independently provided for each of the plurality of groups.
Owner:CANON KK
Radiation imaging system and method
InactiveUS20110243302A1Eliminate the effects ofEnhance the imageImaging devicesRadiation/particle handlingGratingAbsorption contrast
A radiation imaging system includes an X-ray source, first and second absorption gratins disposed in a path of X-rays emitted from the X-ray source, and an FPD. The second absorption grating is stepwise slid in an X direction relatively against the first absorption grating. Whenever the second absorption grating is slid, the FPD captures a fringe image and produces image data. A correction section corrects the image data for spatial variation of X-ray transmittance of the first and second absorption gratings. A phase contrast image generator produces a phase contrast image from the corrected image data. An X-ray absorption contrast image generator calculates a value related to an average of the corrected image data on a pixel-by-pixel basis, and produces an X-ray absorption contrast image from the value.
Owner:FUJIFILM CORP
Radiation imaging apparatus, apparatus control method, and computer-readable storage medium storing program for executing control
ActiveUS20080011958A1Reduce dosageSuppress feverTelevision system detailsMaterial analysis using wave/particle radiationFlat panel detectorRadiation imaging
To provide a radiation imaging apparatus which is capable of both connecting state radiographing for radiographing with a C arm connected and non-connecting state radiographing for radiographing with the C arm disconnected, and is convenient and obtains high quality images, the apparatus includes: a flat panel detector; a holding unit for holding at least the flat panel detector;and a control unit for controlling the flat panel detector. With the configuration, the flat panel detector can be connected to and disconnected from the holding unit; connecting state radiographing can be performed with the flat panel detector connected to the holding unit, and non-connecting state radiographing can be performed with the flat panel detector disconnected from the holding unit; the control unit controls the flat panel detector such that a heat generation quantity of the flat panel detector during the non-connecting state radiographing can be lower than a heat generation quantity of the flat panel detector during the connecting state radiographing.
Owner:CANON KK
Radiation imaging apparatus, driving method thereof and radiation imaging system
InactiveUS20080013686A1Reduce image qualityQuality improvementTelevision system detailsColor television detailsImaging qualityRadiation imaging
When performing an offset correction, without lowering an image quality of the radiographed image data, a prompt radiographing is realized. Hence, a memory 105 stores a first image data for offset correction generated by performing an interlace scanning of the driving lines of odd rows only in a driving circuit unit 103. A memory 106 stores a second image data for offset correction generated by performing the interlace scanning of the driving lines of even row only in the driving circuit unit 103. A processing unit 108 synthesizes the first image data for offset correction and the second image data for offset correction, thereby to generate an image data for offset correction of one frame portion, and an arithmetic operation unit 109 performs an arithmetic operation processing on the radiation image data stored in a memory 107 by using the image data for offset correction of one frame portion synthesized and generated, thereby to perform the offset correction of the radiation image data.
Owner:CANON KK
Radiation imaging apparatus, radiation imaging system, and method of controlling radiation imaging apparatus
InactiveUS20070297567A1Reduce power consumptionReduce riskTelevision system detailsX/gamma/cosmic radiation measurmentRadiation imagingA d converter
A radiation imaging apparatus is capable of taking a moving picture by acquisition by a reading circuit of a plurality of radiation image signals on the basis of a plurality of successive times of irradiation of a radiation detector with radiation rays. The radiation detector has a two-dimensional array of pixels. In a period between a start of an n-th time of irradiation with radiation rays and a start of an (n+1)-th time of irradiation with radiation rays, where n is a natural number, a controller switches an operation status of an analog-to-digital converter that converts electric signals read by the reading circuit into digital signals so that power consumption of the analog-to-digital converter is reduced.
Owner:CANON KK
Radiation imaging apparatus and method of controlling the same
ActiveUS20060120512A1Reduce generationReduce power consumptionRadiation safety meansX-ray apparatusRadiation imagingImaging data
In a radiation imaging apparatus having a radiation generator, an imaging unit including a detecting unit for detecting radiation to generate a radiation image data, a carriage for carrying the radiation generator, and an operating unit for providing an interface to a user, it is decided whether the radiation imaging apparatus is in a moving state or not. When it is decided that the radiation imaging apparatus is in a moving state, the operation function of the operating unit for the radiation detector and the imaging unit is limited.
Owner:CANON KK
Diffraction grating and alignment method thereof, and radiation imaging system
InactiveUS8755487B2Easy to adjustImprove image qualityImaging devicesX-ray spectral distribution measurementRadiation imagingX-ray
An X-ray imaging system includes first to third absorption gratings. Initially, the third absorption grating is disposed in a Z axis orthogonal to a detection surface of a FPD, and the position of the third absorption grating is adjusted in θx and θy directions based on a dose of X-rays having passed through the third absorption grating. Then, the first absorption grating is disposed in the Z axis so as to produce a moiré pattern. The position of the first absorption grating is adjusted in the θx and θy directions so that a frequency of the moiré pattern detected by the FPD becomes uniform. Then, the position of the first absorption grating is adjusted in a Z or θz direction so that the FPD loses the detection of the moiré pattern. After that, the second absorption grating is aligned in a like manner as the first absorption grating.
Owner:FUJIFILM CORP
Radiation imaging apparatus and control method therefor
InactiveUS7403594B2Stably performing radiographyAvoid delaySolid-state devicesMaterial analysis by optical meansSoft x rayX-ray
A lamp emits pulse-shaped visible light when a wait period begins. If a radiation emission switch is not pressed in the wait period, X-ray radiation is not emitted from an X-ray source, and no charges are accumulated in photoelectric conversion elements of an X-ray imaging apparatus. In a non-read period, although signals are sequentially read from the photoelectric conversion elements, an output signal does not change. When the radiation emission switch is pressed in synchronization with a radiation-induced signal in a certain wait period, the X-ray source emits X-rays. After irradiation of X-rays, a photoelectric conversion period transitions to an actual read period. In the photoelectric conversion period, X-rays are emitted and transmitted X-ray information of a patient are accumulated in the photoelectric conversion elements of the X-ray imaging apparatus. In the actual read period, the accumulated information is read.
Owner:CANON KK
Semiconductor Crystal High Resolution Imager
ActiveUS20080042070A1Television system detailsSolid-state devicesPhoton emissionHigh resolution imaging
A radiation imaging device (10). The radiation image device (10) comprises a subject radiation station (12) producing photon emissions (14), and at least one semiconductor crystal detector (16) arranged in an edge-on orientation with respect to the emitted photons (14) to directly receive the emitted photons (14) and produce a signal. The semiconductor crystal detector (16) comprises at least one anode and at least one cathode that produces the signal in response to the emitted photons (14).
Owner:RGT UNIV OF CALIFORNIA +1
Radiation image detector and phase contrast radiation imaging apparatus
InactiveUS20090110144A1Simple structureEasy to manufactureImaging devicesMaterial analysis by optical meansElectricityFluence
A phase contrast radiation imaging apparatus is includes a radiation source, a diffraction grating, and a radiation image detector. The radiation image detector is equipped with a charge generating layer that generates electric charges when irradiated with radiation, and charge collecting electrodes that collect the electric charges. The charge collecting electrodes are linear electrode groups, constituted by linear electrodes which are arranged at a constant period and are electrically connected to each other, provided to have different phases from each other. Thereby, use of a conventional amplitude diffraction grating is obviated.
Owner:FUJIFILM CORP
Radioimaging using low dose isotope
ActiveUS8606349B2Unprecedented sensitivityMovability of detectingUltrasonic/sonic/infrasonic diagnosticsMagnetic measurementsRadiation imagingIsotope
A method of imaging, comprising:(a) providing an isotope at a low dosage in a body of a patient;(b) receiving radiation generated by said isotope from said body using a radiation camera; and(c) reconstructing a 3D distribution of said isotope from said received radiation,wherein the dosage is less than ⅓ of a standard dose set forth in Table 5.
Owner:SPECTRUM DYNAMICS MEDICAL LTD
Radiation imaging system and apparatus and method for detecting defective pixel
InactiveUS8591108B2Improve accuracyX/gamma/cosmic radiation measurmentMaterial analysis by transmitting radiationAcquired characteristicGrating
An X-ray imaging system includes an X-ray source, first and second absorption gratings, and an FPD. The first absorption grating passes X-ray emitted from the X-ray source to form a G1 image. The second absorption grating modulates intensity of the G1 image at each of relative positions to form two or more fringe images. The relative positions differ in phase with respect to a period pattern of the G1 image. The FPD detects two or more frames of image data of the fringe images. A defective pixel detector reads two or more frames of image data stored in a memory and obtains a characteristic value of an intensity modulated signal on a pixel-by-pixel basis based on the read image data. The defective pixel detector detects a defective pixel based on the characteristic value obtained.
Owner:FUJIFILM CORP
Radiation imaging system and driving method thereof
InactiveUS7476027B2Little noiseImprove signal-to-noise ratioX-ray apparatusMaterial analysis by transmitting radiationImaging processingRadiation imaging
When a gain correction is performed for the radiographed object image, the acquisition of the object image having a high grade quality and no artifact is realized. For that purpose, an image storing unit is provided for storing an image for correction radiographed based on conditions set with the table in a state in which no object exists to each operation modes of the plurality of operation modes; and an image processing unit is provided for performing a gain correction processing of the radiographed object image and performs the gain correction processing of the radiographed object image obtained based on the conditions set in the table of the operation mode selected by the selecting unit in a state in which the object exists using a corresponding image for correction extracted from the image storage unit based on the operation mode selected by the selecting unit.
Owner:CANON KK
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