Abstract: A radioisotope generator that releases a daughter radioisotope from radioactive decay of a corresponding parent isotope, such as a 82Sr/82Rb radioisotope generator or 68Ge/68Ga radioisotope generator, may be used to generate radioisotopes for medical imaging applications. In some examples, a gamma ray detector is positioned to detect gamma rays emanating from radioactive eluate flowing from the generator. Based on the detected gamma rays, an activity of the daughter radioisotope in the eluate and an activity of the parent radioisotope in the eluate may be determined. Depending on the application, the activity of the daughter radioisotope and the activity of the parent radioisotope may be determined in substantially real time, e.g., so that the eluate can be diverted from patient dosing based on determined activity information for the eluate.

Abstract: In a photoelectric changing unit, a photoelectric conversion unit converts light into electric charge, and an electric charge accumulation unit accumulates the electric charge in a polygonal area whose plurality of sides are adjacent to the photoelectric conversion unit on a light receiving surface. A voltage generation unit accumulates the electric charge and generates a voltage according to an amount of the accumulated electric charge. A first transfer unit transfers the electric charge from the photoelectric conversion unit to the electric charge accumulation unit when an instruction on a transfer to the electric charge accumulation unit is issued. A second transfer unit transfers the electric charge from the electric charge accumulation unit to the voltage generation unit when an instruction on a transfer to the voltage generation unit is issued.

Abstract: A method includes detecting currently existing dose rates while a worker is performing an operation within a Radiologically Controlled Area (RCA) and visually outputting to the worker a dosage rate map of ionizing radiation within the RCA. The visual output can be visually depicted on a display that is worn by the worker during the operation and that is situated in proximity to the worker's eye. The position of the worker within the RCA can be stored in conjunction with the measured dose rate as detected by a dosimeter worn by the worker at such position, potentially also with a time stamp. These data can then be employed to generate the dosage rate map of the RCA that shows the various dose rates at various locations within the RCA and that can be visually output for viewing by the worker or other personnel outside the RCA.

Abstract: A sensor for a laser may contain an at least partially transparent plastic with a fluorescent material that receives laser light at one frequency and creates light inside the transparent plastic with a second, different frequency. The light at the second frequency may travel through the plastic to an electronic sensor mounted against the transparent plastic. The sensor may be several feet in length or longer and still detect a single impinging Class I or Class II laser beam. In systems where the position of the laser may be known, a set of linear gain coefficients may be determined to calibrate the electronic sensor, as the signal strength of a received signal may decay with the distance from the electronic sensor to the location where the laser beam impinges the plastic element.

Abstract: A diagnostic imaging system includes a plurality of radiation detectors (20) configured to detect radiation events emanating from an imaging region. The system includes a calibration phantom (14) configured to be disposed in the imaging region spanning substantially an entire field of view and to generate radiation event pairs that define lines-of-response, wherein the calibration phantom is thin such that each LOR intersects the calibration phantom along its length, the thickness of the phantom being smaller than the length of the LORs. A calibration processor (24) receives input of the radiation detectors and calculates an incidence angle independent crystal delay Ti for each detector. The calibration processor (24) constructs a first look-up table for the timing correction of each LOR and a second look-up table for the angle depth of interaction correction for each crystal by combining Ti and ?i.

Abstract: A static Fourier transform spectrometer is disclosed that includes a beam splitter, a mirror device, and a collection optic. The beam splitter divides an input light beam into a first arm and a second arm, wherein the first arm is reflected by the beam splitter and the second arm passes through the beam splitter, wherein the first arm extends to the converging optical unit without deflection after reflection at the mirror device, wherein the second arm extends to the converging optical unit without deflection after passing through the beam splitter, and wherein the collection optic merges the first arm and the second arm for interference.

Abstract: A method and apparatus are provided for generating a thermal image of a target. The method comprises: at one or more electro-magnetic transducers, receiving long wave infra-red (LWIR) radiation emitted from the target; illuminating the electro-magnetic transducers with radiation being transmitted wavelengths that belong to Near Infra-Red (NIR) band and/or that belong to the visible (VIS) band; converting at least part of the radiation received as LWIR radiation to energy at the NIR band and/or at the VIS band; and generating a thermal image based on the energy retrieved after converting at least part of the LWIR radiation received, to energy at the NIR band and/or at the VIS band, and wherein receiving the LWIR radiation and illuminating the electro-magnetic transducers, are carried out simultaneously.

Abstract: A method is provided including acquiring detection events with a radiation detector including a semiconductor plate and configured to produce electrical signals in response to absorption of ionizing radiation in the semiconductor plate, wherein electrons and holes are generated responsive to absorption of the ionizing radiation. The semiconductor plate includes a first surface opposed to a second surface, with sidewalls interposed between the first surface and the second surface. A cathode electrode is disposed on the first surface and pixelated anode electrodes are disposed on the second surface. The method also includes optically coupling infrared (IR) radiation into a first portion of at least one of the sidewalls of the semiconductor plate of the radiation detector, and not coupling IR radiation into a second portion of the at least one of the sidewalls.

Abstract: A fluorescence detecting apparatus includes an excitation light applying section that applies excitation light to a protective film containing an absorbing agent. A photomultiplier tube detects fluorescence emitted from the absorbing agent due to absorption of the excitation light. A fluorescence passing filter removes light having wavelengths other than the wavelength of the fluorescence emitted from the absorbing agent, and a reflecting mirror having a reflecting surface reflects the fluorescence emitted from the protective film toward the photomultiplier tube. This reflecting surface is formed by a part of a curved surface forming a spheroid having first and second foci. The first focus is positioned at a target area of the protective film where the excitation light is applied, and the second focus is positioned at a light detecting element included in the photomultiplier tube.

Abstract: A method for fabricating a pixelated scintillator including providing a pixelated scintillator-structure and a connection-structure in such a way that the connection-structure is in mechanical contact with two adjacent pixels of the pixelated scintillator-structure. Moreover, the pixelated scintillator-structure includes a first sintering-shrinking-coefficient and the connection-structure includes a second sintering-shrinking-coefficient that is greater than the first sintering-shrinking-coefficient. Further, the pixelated scintillator-structure and the connection-structure are sintered such that a gap between two adjacent pixels of the pixelated scintillator-structure is reduced.

Abstract: A collimator for a SPECT system, the collimator being adapted for absorbing and collimating gamma rays emitted by a radiation source within a field of view the collimator, said collimator having an alignment direction for directing along a longitudinal axis of a measuring cavity of the SPECT system and said collimator comprising at least one collimator body of radiation absorbing material, the collimator body comprising a plurality of apertures being formed in the collimator body, the plurality of apertures being arranged in a plurality of groups separated from each other in said alignment direction. The apertures of each group are oriented such as to define at least one projection view along a corresponding at least one projection direction. The plurality of said projection directions corresponding to each and every of said plurality of groups cover an angular range sufficiently large for sufficient image information for artifact-free reconstruction.

Abstract: Provided is a method for manufacturing a housing of a radiation detection cassette that can appropriately form a recess without a housing material depositing on an end mill or the like, in a case where a recess is formed by working the housing material formed of an alloy containing Mg and Li. A method for manufacturing a housing of a radiation detection cassette that houses a radiation detector in the housing includes preparing a housing material that is formed of an alloy containing Mg and Li and contains 0.1 mass % or more of Li, forming a recess using a working method other than cutting work on a surface of the housing material, and performing cutting work on the formed recess to shape the recess.

Abstract: A portable radiation detection device with a detector unit comprising a scintillator with an array of avalanche photodiodes allows to reliably detect incident ionizing radiation or radiation contamination in the presence of intense magnetic fields of 0.1 Tesla and above.

Abstract: Manifestation of some physiological responses (e.g., stress, mental workload, or a headache) may involve the emergence of asymmetric thermal patterns on the face. Thus, thermal measurements of the face that are indicative of thermal asymmetry can be useful to detect such physiological responses. In one embodiment, a system includes first and second inward-facing head-mounted thermal cameras (CAM1 and CAM2, respectively) that are located less than 15 cm from the user's face, which take thermal measurements of regions on the right and left sides of the face (THROI1 and THROI2, respectively) of the user. The symmetric overlapping between the regions on the right and left sides (ROI1 and ROI2, respectively) is above 60%, and CAM1 and CAM2 do not occlude ROI1 and ROI2. Optionally, the system includes a computer that detects a physiological response based on thermal asymmetry between THROI1 and THROI2.

Abstract: A method is disclosed for analyzing a thin tissue sample and adapted to be supported on a slide. The tissue sample may be placed on a slide and exposed to one or more different exogenous fluorophores excitable in a range of about 300 nm-200 nm, and having a useful emission band from about 350 nm-900 nm, and including one or more fluorescent dyes or fluorescently labeled molecular probes that accumulate in tissue or cellular components. The fluorophores may be excited with a first wavelength of UV light between about 200 nm-290 nm. An optical system collects emissions from the fluorophores at a second wavelength, different from the first wavelength, which are generated in response to the first wavelength of UV light, to produce an image for analysis.

Abstract: An electronic device with waterproof structure includes an assembly and a manipulation member movably disposed on an outer surface of the assembly. The assembly includes a case and an optical detection module. The case defines a waterproof space and has a translucent region. The optical detection module is arranged in the waterproof space. The optical detection module has a lighting unit and a sensor array. Light emitted from the lighting unit enables to travel out of the waterproof space by penetrating through the translucent region. At least part of the manipulation member is corresponding in position to the translucent region. The lighting unit is configured to emit light onto the manipulation member, and the sensor array is configured to receive the light reflected from the manipulation member.

Abstract: A calibration rig and calibration method for an imaging system includes a base and a holder extending from the base, the holder including a fixture configured to hold a radioactive source material in a two-dimensional geometric configuration and a radioactive source material disposed in the fixture.

Abstract: A neutron detection apparatus includes a neutron detector and an analyzer. The neutron detector includes a plurality of neutron detector assemblies, where each of the neutron detector assemblies includes a plurality of neutron detection devices. The neutron detector also includes a moderating volume. The plurality of neutron detector assemblies are disposed within the moderating volume so as to form a three-dimensional array of neutron detection devices within the moderating volume. The analyzer is communicatively coupled to each of the neutron detection devices of the plurality of neutron detector assemblies. The analyzer configured to receive one or more measured response signals from each of the neutron detection devices, and perform one or more analysis procedures to determine one or more characteristics associated with the one or more neutron sources based at least on the received one or more measured response signals.

Abstract: A portable, stand-alone microfluidic interrogation device including a microprocessor and a touch-screen display. The touch-screen display can receive one or more user input to select a particular particle interrogation procedure, and subsequently show interrogation results. A microfluidic path extending through the interrogation device includes alignment structure that defines an interrogation zone in which particles carried in a fluid are urged toward single-file travel. Operable alignment structure may define sheath-, or non-sheath fluid flow. Desirably, a portion of the alignment structure is removable from the device in a tool-free procedure. The device may operate under the Coulter principle, and/or detect Stokes' shift phenomena, and/or other optically-based signal(s).

Abstract: A method for determining a formation thermal neutron decay rate from measurements of radiation resulting from at least one burst of high energy neutrons into formations surrounding a wellbore includes determining a first apparent neutron decay rate in a time window beginning at a first selected time after an end of the at least one burst, a second apparent decay rate from a time window beginning at a second selected time after the burst and a third apparent decay rate from a third selected time after the burst. The second time is later than the first time. A thermal neutron capture cross section of fluid in the wellbore is determined. A decay rate correction factor is determined based on the first and second apparent decay rates and a parameter indicative of the wellbore capture cross-section. The correction factor is applied to the third apparent decay rate to determine the formation thermal neutron decay rate.