Abstract: Systems, devices, and methods are presented for automatic tuning, calibration, and verification of radiation therapy systems comprising control elements configured to control parameters of the radiation therapy systems based on images obtained using electronic portal imaging devices (EPIDs) included in the radiation therapy system.

Abstract: Aspects of the present disclosure describe techniques for independently controlling an angle (e.g., change in tilt) and/or position (e.g., change in lateral position) of an optical beam. For example, an optical beam control system may include a telescope with rotatable mirrors and lenses configured to provide a path to an optical beam to produce an output optical beam, which in turn is made into parallel optical beams following a diffractive optical element. The optical beam control system may also include a detector system to a beam angle and/or a beam position of one of the parallel optical beams to generate feedback signal or signals to control a rotation of one or more of the mirrors in the telescope such as to adjust the beam angle, the beam position, or both of the parallel optical beams. The optical beam control system may be part of a quantum information processing (QIP) system.

Abstract: Embodiments described herein generally relate to: sensing and/or authentication using luminescence imaging; diagnostic assays, systems, and related methods; temporal thermal sensing and related methods; and/or to emissive species, such as those excitable by white light, and related systems and methods.

Abstract: Multi-spectral methods and systems for the day and night remote sensing (detection, identification, and quantification) of greenhouse gas emission sources from space are provided. The sensor system includes a telescope assembly that passively collects light from an observation area and directs that light through spectral, optical filters and to a sensor array having a plurality of rows and columns of pixels. Different groups of sensor array pixel rows are aligned to receive light that has passed through different optical filters. The filters have passbands corresponding to the reflective and emissive bands of gases of interest, as well as associated reflective and emissive reference bands, and broadband spectral bands. A set of image data frames is obtained as the field of view of the sensor system moves over an observation area and an aggregate image showing locations of detected gas emissions is generated using the collected data.

Abstract: An infrared imaging micro-bolometer integrates a membrane assembled in suspension on a substrate by support arms. The membrane includes an absorbing material configured to capture infrared radiations and a thermometric material connected to the absorbing material configured to perform a transduction of the infrared radiations captured by the absorbing material The thermometric material is arranged on a surface area smaller than 0.4 times a surface area of the membrane. The membrane also includes at least one central dielectric layer arranged between the absorbing material and the thermometric material. Recesses are formed in the absorbing material and in the at least one dielectric layer in portions of the membrane devoid of the thermometric material.

Abstract: A radiation detector head assembly includes a detector column. The detector column includes a detector having a first surface and a second surface opposite the first surface. The detector column also includes a first collimator disposed over the first surface of the detector configured for use during imaging scans involving radiation in a first energy range. The detector column further includes a second collimator disposed over the second surface of the detector configured for use during imaging scans involving radiation in a second energy range different from the first energy range.

Abstract: A detector system for an x-ray imaging device includes a detector chassis, a plurality of sub-assemblies mounted to the detector chassis and within an interior housing of the chassis, the sub-assemblies defining a detector surface, where each sub-assembly includes a thermally-conductive support mounted to the detector chassis, a detector module having an array of x-ray sensitive detector elements mounted to a first surface of the support, an electronics board mounted to a second surface of the support opposite the first surface, at least one electrical connector that connects the detector module to the electronics board, where the electronics board provides power to the detector module and receives digital x-ray image data from the detector module via the at least one electrical connector. Further embodiments include x-ray imaging systems, external beam radiation treatment systems having an integrated x-ray imaging system, and methods therefor.

Abstract: A mechanism that enhances rigidity of a casing of a radiation imaging apparatus while effectively using limited space inside the casing is provided. The rectangular casing that contains a radiation detecting panel, the radiation detecting panel detecting incident radiation, includes a front cover including an incident surface on which the radiation is incident, and a rear cover disposed in a manner to be opposite to the front cover. The rear cover includes one or more recess portions and a rib, at least one end of the rib being connected to a recess portion of the one or more recess portions, at a bottom surface opposite to the incident surface.

Abstract: A PET imaging system includes a gantry having a patient tunnel and a first detector unit and a second detector unit housed inside the gantry, each including a plurality of detector elements in a helical arrangement around an axial axis of the imaging system. Each of the detector elements in the second detector unit is spaced apart from a corresponding detector element in the first detector unit by an axial gap. Each detector element has an axial position. Each of the first and second detector units has its detector elements arranged so that a set of the detector elements is positioned such that each detector element in the set is offset from an adjacent detector element in the detector unit such that a maximum difference between axial positions of detector elements in each detector unit is less than or equal to the axial gap.

Abstract: An optical detection system for a capillary electrophoresis instrument is disclosed. The system includes an ultraviolet (UV) source and an absorption measurement optical path. In an embodiment, the optical path comprises a first plurality of optical elements arranged to obtain a plurality of respective UV beamlets from a UV beam emitted by the UV source and to direct the respective UV beamlets transversely through respective capillaries of a plurality of capillaries and to an absorption detector positioned to detect respective signals for use in obtaining respective UV absorption measurements corresponding to the respective capillaries.

Abstract: Bias circuit elements for applying voltages/currents to a photodetector are described. Bias circuit elements described are active devices, e.g. mosfets, directly connected to the photodetector signal point, which inject noise that will be amplified/integrated. Lowering 1/f noise in these bias devices uses multiple parallel mosfets and switching the parallel mosfets gates between a bias activation level signal and a voltage sufficient to drive the mosfet into accumulation Gate switching may be accomplished by at least two partially out of phase clocking signals, with at least one parallel mosfet applying bias while another is in accumulation in continuously switched time periods. Gate switching at a frequency higher than the imaging bandwidth, will have negligible effect on the image signal. During the accumulation phase traps present within the conducting channel of each MOSFET will be depopulated, essentially resetting the MOSFET's 1/f noise, allowing for long integration times while controlling 1/f noise.

Abstract: A system and method for the placement of a portable x-ray cassette is disclosed herein. In some embodiments, the system comprises a planar cassette element, a fabric, a collar element and a rigid sheet. The planar cassette element includes a hollow cavity disposed on a leading edge thereof and the fabric is configured to dispense from the hollow cavity, surround the planar cassette element and slide about the planar cassette element away from and toward the leading edge of the cassette element. The system allows for easy positioning of the portable x-ray cassette underneath a patient to be x-rayed.

Abstract: A radiation detection system may include a mobile device having a flash memory. The device may monitor various characteristics of the flash memory to determine when damage to the flash memory has occurred from radiation exposure. The device may associate damage to the flash memory with a radiation dose, and determine a level of radiation to which the memory, and thus the device, has been exposed. The device also may determine a length of time and locations where the radiation exposure has occurred. If the device determines that the level of radiation exposure exceeds a threshold associated with a safe level of radiation exposure for a human user, the device may generate an alert to the user.

Abstract: Disclosed herein are methods for live-cell imaging, compositions for performing the live cell imaging, and methods for making the composition. The method may comprise contacting a cell with an effective amount of a catenane, irradiating the cell, and detecting exciplex emission from the catenane within the cell. The catenane may comprise two mechanically interlocked macrocycles, each of the two macrocycles comprise an aromatic fluorophore subunit, and the aromatic fluorophores are arranged in a face-to-face [? . . . ?] stack allowing for the exciplex emission.

Abstract: Gas sensors are disclosed having an on-board, low-power data processor that uses multivariable gas classification and/or gas quantitation models to perform on-board data processing to resolve two or more gases in a fluid sample. To reduce computational complexity, the gas sensor utilizes low-power-consumption multivariable data analysis algorithms, inputs from available on-board sensors of ambient conditions, inputs representing contextual data, and/or excitation responses of a gas sensing material to select suitable gas classification and/or gas quantitation models. The data processor can then utilize these gas classification and quantitation models, in combination with measured dielectric responses of a gas sensing material of the gas sensor, to determine classifications and/or concentrations of two or more gases in a fluid sample, while consuming substantially less power than would be consumed if a global comprehensive model were used instead.

Abstract: A temperature sensor includes a first electrode, second electrode, and a pyroelectric layer between the first electrode and the second electrode. The pyroelectric layer includes a ferroelectric polymer and an ionogel.

Abstract: A method for increasing a detection distance of a surface of an object illuminated by near-IR electromagnetic radiation, including: (a) directing near-IR electromagnetic radiation from a near-IR electromagnetic radiation source towards an object at least partially coated with a near-IR reflective coating that increases a near-IR electromagnetic radiation detection distance by at least 15% as measured at a wavelength in a near-IR range as compared to the same object coated with a color matched coating which absorbs more of the same near-IR radiation, where the color matched coating has a ?E color matched value of 1.5 or less when compared to the near-IR reflective coating; and (b) detecting reflected near-IR electromagnetic radiation reflected from the near-IR reflective coating. A system for detecting proximity of vehicles is also disclosed.

Abstract: Systems, methods and tools for the interrogation of fiber-reinforced composite strength members to assess the structural integrity of the strength members. The systems and methods utilize the transmission of light through optical fibers that are embedded along the length of the strength members. The inability to detect light through one or more of the optical fibers may be an indication that the structural integrity of the A strength member is compromised. The systems and methods may be implemented without great difficulty and may be implemented at any time in the life cycle of the strength member, from production through installation. The systems and methods have particular applicability to bare overhead electrical cables that include a fiber-reinforced strength member.

Abstract: A method and device for determining the depth and fluorophore concentration of a fluorophore concentration below the surface of an optically absorbing and scattering medium suitable for use in fluorescence-based surgical guidance such as in tumor resection is described. Long-wavelength stimulus light us used to obtain deep tissue penetration. Recovery of depth is performed by fitting measured modulation amplitudes for each spatial frequency to precomputed modulation amplitudes in a table of modulation amplitudes indexed by optical parameters and depth.

Abstract: An optical detector module can be used to implement proximity sensing function by detecting ambient light outside of the optical detector module in accordance with a first detection threshold. An optical detector module can be further used to implement other active functions such as material detection (e.g., skin) or depth-sensing by emitting one or more optical signals (e.g., light pulses at a specific wavelength) and detecting the reflected optical signals relative to a second and/or third detection threshold. The disclosure provides technical solutions for actively monitoring detection threshold(s) of an optical detector module to achieve better power management. In some embodiments, such solutions are useful for photodetectors having a wide sensing bandwidth, such as a photodetector formed in germanium or a photodetector comprising an absorption region comprising germanium.