Photon Imaging, Inc.

Gamma Medica-ideas, Inc.

Dxray, Inc.

Other

University of Southern California

Sii Nanotechnology Inc.

Advanced Photonix, Inc.

Xsirius Photonics, Inc.

Xsirious, Inc.

Xsirius, Inc.

Jan S Iwanczyk

Bradley E Patt

Edward J Hoffman

Einar Nygard

Gintas Vilkelis

Carolyn Tull

Valeri D Saveliev

William C Barber

R Michael Madden

Thomas T Lewis

Wayne F Schnepple

Shaul Barkan

Andrzej J Dabrowski

Lawrence R MacDonald

Jeff B Barton

A two dimensional radiation detector array includes a plurality of detector cards, each of the detector cards including: a plurality of radiation detectors arranged in a linear array; and a plurality of amplifiers, each of the amplifiers being electrically coupled to a respective one of the plurality of radiation detectors; and a separator between first and second detector cards of the plurality of detector cards.

Edge-on two-dimensional detector arrays

An imaging detector system includes a radiation detector having a plurality of pixels for generating a plurality of detection signals in response to radiation. Each of the pixels is used to generate a corresponding one of the detection signals. The imaging detector system includes a plurality of photon counting channels. Each photon counting channel is coupled to a corresponding one of the pixels to receive and process the corresponding one of the detection signals. Each photon integrating channel is coupled to a corresponding one of the pixels to receive and process the corresponding one of the detection signals. An image processor receives outputs from the photon counting channels and the photon integrating channels, wherein the image processor is adapted to generate an image using the received outputs.

Photon counting imaging detector system

An apparatus for intravascular imaging to detect and characterize early stage, unstable coronary arty plaques. The detector works by identifying and localizing plaque-binding beta-emitting radiopharmaceuticals.

Intravascular imaging detector

An apparatus for intravascular imaging to detect and characterize early-stage, unstable coronary arty plaques. The detector works by identifying and localizing plaque-binding beta-emitting radiopharmaceuticals.

A method is provided for fabricating in a thermal evaporation system a polycrystalline film capable of directly detecting radiation. Source material is placed in a container, and the container is evacuated to create vacuum within the container. The source material is heated to evaporate the source material for depositing on a substrate. The polycrystalline film is used in as deposited form to detect the radiation.

Method and apparatus for fabricating mercuric iodide polycrystalline films for digital radiography

A radiation detector for detecting radiation such as x-rays. The radiation detector includes a detector having a plurality of pixels, wherein each of the pixels is used for detecting the radiation. The radiation detector also includes a ball grid array (BGA) package having a plurality of solder balls formed on a first side and a plurality of contacts formed on a second side. The BGA package also has a cavity, in which at least one integrated circuit (IC) chip is mounted. The IC chip has a plurality of readout channels, each of the readout channels being coupled to a corresponding one of the pixels via a corresponding one of the solder balls to receive an electrical signal corresponding to the radiation detected by the corresponding one of the pixels.

Pixelated cadmium zinc telluride based photon counting mode detector

A radiation detector system having a heat pipe based cooling. The radiation detector system includes a radiation detector thermally coupled to a thermo electric cooler (TEC). The TEC cools down the radiation detector, whereby heat is generated by the TEC. A heat removal device dissipates the heat generated by the TEC to surrounding environment. A heat pipe has a first end thermally coupled to the TEC to receive the heat generated by the TEC, and a second end thermally coupled to the heat removal device. The heat pipe transfers the heat generated by the TEC from the first end to the second end to be removed by the heat removal device.

Radiation detector system having heat pipe based cooling

An imaging probe system includes a portable imaging gamma ray probe and a computer, and is used to locate and examine the distribution of radiation concentrated in animal tissue. The imaging probe system can operate in an imaging mode, a non-imaging mode (simple counting mode), or both simultaneously. The imaging probe system may include smart algorithms that analyze subdivisions of the images and indicate to the user via an audio indicator, a visual indicator, or both, the presence of one or more high-density concentrations of radiation within the image. The determination of such concentrations is governed either spatial resolution requirements of the subdivided image, or based on statistical variations of the cumulative number of particles detected. The imaging probe can also display the count of the detected radioactivity. The frequency of the audio output may be varied in proportion to the count rate and modulating the frequency, volume, phase or stereo panning of the audio output indicates the presence of more than one source in the field of view. By replacing the collimator of the imaging probe, the user is allowed to vary imaging parameters including variable spatial resolution, sensitivity and field of view.

Method and apparatus for imaging and localizing radiation

A junction-side illuminated detector array of pixelated detectors is constructed on a silicon wafer. A junction contact on the front-side may cover the whole detector array, and may be used as an entrance window for light, x-ray, gamma ray and/or other particles. The back-side has an array of individual ohmic contact pixels. Each of the ohmic contact pixels on the back-side may be surrounded by a grid or a ring of junction separation implants. Effective pixel size may be changed by separately biasing different sections of the grid. A scintillator may be coupled directly to the entrance window while readout electronics may be coupled directly to the ohmic contact pixels. The detector array may be used as a radiation hardened detector for high-energy physics research or as avalanche imaging arrays.

Junction-side illuminated silicon detector arrays

An avalanche drift photodetector (ADP) incorporates extremely low capacitance of a silicon drift photodetector (SDP) and internal gain that mitigates the surface leakage current noise of an avalanche photodetector (APD). The ADP can be coupled with scintillators such as CsI(Tl), NaI(Tl), LSO or others to form large volume scintillation type gamma ray detectors for gamma ray spectroscopy, photon counting, gamma ray counting, etc. Arrays of the ADPs can be used to replace the photomultiplier tubes (PMTs) used in conjunction with scintillation crystals in conventional gamma cameras for nuclear medical imaging.

Semiconductor radiation detector with internal gain

A radiation imaging detector has a scintillator array to be optically and mechanically coupled to a photodiode array, such that scintillator segments of the scintillator array are positioned over and aligned with respective pixels of the photodiode array. A metallic grid is deposited on the photodiode array to provide sufficient optical contrast for accurate visual alignment of the scintillator and photodiode arrays during fabrication. The metallic grid additionally serves to lower the series resistance of the photodiode entrance electrode. After alignment of the arrays, the upper surface of the scintillator array is closed by a reflective structure.

Radiation imaging detector and method of fabrication

Radiation detectors according to one embodiment of the invention are implemented using scintillators combined with a semiconductor drift photodetectors wherein the components are specifically constructed in terms of their geometry, dimensions, and arrangement so that the scintillator decay time and drift time in the photodetector pairs are matched in order to achieve a greater signal-to-noise ratio. The detectors may include electronics for amplification of electrical signals produced by the silicon drift photodetector, the amplification having a shaping time optimized with respect to the decay time of the scintillator and time spread of the signal in the silicon drift photodetector to substantially maximize the ratio of the signal to the electronic noise.

Gamma-ray detector employing scintillators coupled to semiconductor drift photodetectors

A semiconductor radiation detector is provided to detect x-ray and light photons. The entrance electrode is segmented by using variable doping concentrations. Further, the entrance electrode is physically segmented by inserting n&plus; regions between p&plus; regions. The p&plus; regions and the n&plus; regions are individually biased. The detector elements can be used in an array, and the p&plus; regions and the n&plus; regions can be biased by applying potential at a single point. The back side of the semiconductor radiation detector has an n&plus; anode for collecting created charges and a number of p&plus; cathodes. Biased n&plus; inserts can be placed between the p&plus; cathodes, and an internal resistor divider can be used to bias the n&plus; inserts as well as the p&plus; cathodes. A polysilicon spiral guard can be implemented surrounding the active area of the entrance electrode or surrounding an array of entrance electrodes.

Growing community of inventors

Los Angeles, CA, United States of America

Jan S Iwanczyk