Abstract: A sensing device includes a pair of infrared sensors comprising respective temperature-sensitive transistors, which are configured to generate respective output signals in response to incident thermal radiation, and which are coupled together in a differential circuit topology that includes at least one differential amplifier that follows the temperature-sensitive transistors, so as to amplify a difference between the respective output signals.

Abstract: Systems for determining the presence and distribution of gas emissions in an area are provided. For example, a system may include one or more light detectors and one or more reflectors and/or one more retroreflectors disposed around the perimeter, a light source configured to emit light at a plurality of wavelengths towards the one or more light detectors and/or the one or more reflectors and/or one or more retroreflectors, and one or more processors configured to receive information representing light intensity detected by the one or more light detectors, respectively at each of the plurality of wavelengths and determine gases present in each path based on the light intensity detected by the respective detector at each of the plurality of wavelengths and distribution thereof. The path being either light source-respective detector, light source-respective reflector-respective detector or light source-respective retroreflector-respective detector. Other system may not use reflectors and/or retroreflectors.

Abstract: A method of detecting natural gas releases that includes the step of traversing a target area with a gas-filter correlation radiometer having a field of view oriented towards the target area. The gas-filter correlation radiometer receives reflected radiation in a passband from the target area and produces gas-filter correlation radiometer signals from the received reflected radiation. A surface reflectivity spectral profile of the target area is determined. The presence of methane in the target area is then determined based upon the received reflected radiation and the surface reflectivity spectral profile of the target area.

Abstract: A dose calculation device 50 includes: a detector 20 detecting a physical quantity as voltage; a V/I conversion element 28 converting the quantity into current; a memory 51 storing a zero point current and a shift amount from a true value caused by radiation; a correlation storage 52 storing zero point shift data in correlation between the zero point current and cumulative dose and span shift data in correlation between the cumulative dose and the shift; a first evaluator 53 estimating cumulative dose of the V/I conversion element 28 based on the zero point current and the zero point shift; a second evaluator 54 estimating cumulative dose of the V/I conversion element 28 based on the shift and the span shift; and a comparator 56 specifying a common cumulative dose as a true cumulative dose by comparing cumulative doses estimated by the first evaluator 53 and the second evaluator 54.

Abstract: An imaging system including an imaging device and/or a cooling system is provided. The imaging system may include a control module, an imaging device, and/or a cooling system. The imaging device may include a first portion and a second portion. The cooling system may include a cooling module configured to generate a cooling medium, and/or a cooling medium passage configured to spread the cooling medium. The cooling medium passage may belong to a closed loop. At least part of the cooling system may be located within the imaging device such that the cooling medium may be in direct contact with the at least part of the imaging device.

Abstract: A portable radiography device includes a housing with a front plate, a back plate, and a sensor panel accommodated therein. Electronic components disposed on the back plate side of the sensor panel are used to read a charge generated by the radiation detection element as a signal value and generate heat when reading the signal value. A heat conduction member is pressed by the back plate and the electronic components resulting in close contact of the heat conduction member with the electronic components and the back plate.

Abstract: A method and system for simultaneously monitoring a positron emission tomography scanner performance during a continuous-bed-motion acquisition is disclosed.

Abstract: An X-ray generator capable of reliably reducing an X-ray focal spot size without depending on the focal spot size of an electron beam on a target. Providing, within the irradiation range of an electron beam B of a target laminated structure 3 comprising a target 2 and an X-ray irradiation window 1, a low X-ray absorptivity region 3a of localized low X-ray absorptivity in the irradiation direction of the electron beam B results in the suppression of emission to the outside of X-rays from among the X-rays generated as a result of the irradiation of the electron beam B onto the target 2 that are from regions other than the low X-ray absorptivity region 3a, and an X-ray focal spot of a size corresponding to the size of the low X-ray absorptivity region 3a is obtained regardless of the size of the irradiation region of the electron beam B.

Abstract: A method of operation of a scintillator detector includes a scintillator and a photodetector is described, together with a device embodying the method. The method includes the steps of: periodically producing a light pulse; impinging at least some of the light from a successive plurality of such light pulses onto a light-receptive part of the photodetector; measuring the electrical response of the photodetector; processing the electrical response of the photodetector to determine a pulse height and a variance of pulse height; numerically processing the pulse height and variance of pulse height so determined to obtain at least a first data item characteristic of the response of the photodetector.

Abstract: Apparatus and methods for fluorescence imaging using radiofrequency multiplexed excitation. One apparatus splits an excitation laser beam into two arms of a Mach-Zehnder interferometer. The light in the first beam is frequency shifted by an acousto-optic deflector, which is driven by a phase-engineered radiofrequency comb designed to minimize peak-to-average power ratio. This RF comb generates multiple deflected optical beams possessing a range of output angles and frequency shifts. The second beam is shifted in frequency using an acousto-optic frequency shifter. After combining at a second beam splitter, the two beams are focused to a line on the sample using a conventional laser scanning microscope lens system. The acousto-optic deflectors frequency-encode the simultaneous excitation of an entire row of pixels, which enables detection and de-multiplexing of fluorescence images using a single photomultiplier tube and digital phase-coherent signal recovery techniques.

Abstract: A medical phantom is an object that models at least a part of the human body by using unit blocks, wherein the unit blocks include: a first unit block having a hexahedral shape of which the inside is empty; and a second unit block. The second unit block has a shape, of which the inside is empty, different from the hexahedral shape The second unit block also has ridges formed at the upper end thereof for stud-and-tube coupling, and has furrows formed at the lower end thereof and enabled to be coupled to the ridges.

Abstract: A fissile neutron detection system includes an ionizing thermal neutron detector arrangement including an inner peripheral shape that at least substantially surrounds a moderator region for detecting thermal neutrons that exit the moderator region but is at least generally transparent to the incident fissile neutrons. A moderator is disposed within the moderator region having lateral extents such that any given dimension that bisects the lateral extents includes a length that is greater than any thickness of the moderator arrangement transverse to the lateral extents. The moderator can include major widthwise and major lengthwise lateral extents such that any given dimension across the lengthwise and widthwise lateral extents includes a length that is greater than any thickness of the moderator arrangement transverse to the lateral extents.

Abstract: Disclosed are systems and methods of using integrated computational elements to determine unknown interferents in a fluid being monitored. One method includes monitoring a fluid with an optical computing device comprising at least two integrated computational element (ICE) cores configured to optically interact with a fluid and detect a corresponding at least two characteristics of the fluid, each ICE core being designed and manufactured with reference to known spectra related to the at least two characteristics of the fluid, generating output signals corresponding to the at least two characteristics of the fluid with the optical computing device, wherein an intensity of each output signal corresponds to a concentration of the at least two characteristics of the fluid, and calculating a representative spectrum of the fluid with a signal processor based on the known spectra of the at least two characteristics and the intensity of each output signal.

Abstract: Various approaches are discussed for using four-side buttable CMOS tiles to fabricate detector panels, including large-area detector panels. Fabrication may utilize pads and interconnect structures formed on the top or bottom of the CMOS tiles. Electrical connection and readout may utilize readout and digitization circuitry provided on the CMOS tiles themselves such that readout of groups or sub-arrays of pixels occurs at the tile level, while tiles are then readout at the detector level such that readout operations are tiered or multi-level.

Abstract: There is provided a light receiver which corrects measurement of ultraviolet rays on the basis of measurement of visible right and infrared rays. The light receiver is a light receiver (1) including a first light-receiving element (PD1) and a second light-receiving element (PD2), and a UV cutoff filter (11) in which transmittance of light in an ultraviolet region is lower, in which light after passage through the UV cutoff filter (11) enters the first light-receiving element (PD1), and the first light-receiving element (PD1) and the second light-receiving element (PD2) are switchable between a photodiode (PD_uv) having sensitivity to the ultraviolet region and a photodiode (PD_clear) having sensitivity to a visible light region and an infrared region. Unevenness in incident light is calculated from photocurrents in photodiodes (PD_ir+PD_vis) of the first light-receiving element (PD1) and the second light-receiving element (PD2).

Abstract: A detector having an array of pixels arranged in columns and rows. Each of the pixels has a photosensor and a switch device. The switch devices in each pair of row-adjacent pixels are connected to a common data line and a common bottom gate line. A pair of top gate lines are each connected to one of the pair of row-adjacent pixels.