A multiplexing scheme, a system for reading out signals from an optical sensor array, particle detection devices and systems are provided. For example, the optical sensor array may comprise plurality of optical sensors arranged in rows and columns. In the multiplexing scheme, a readout ASIC may be electrically connected to the plurality of optical sensors via a plurality of first channels and a plurality of second channels. Each first channel may be electrically connected to a subset of optical sensors in a corresponding row of the optical sensor array, where there may be at least one optical sensor between connections. Each second channel may be electrically connected to a subset of optical sensors in a corresponding column of the optical sensor array, where there may be at least one optical sensor between connections.

A radiation imaging apparatus includes a detection unit that detects radiation applied by a radiation generating apparatus, an automatic exposure control unit that determines whether to stop application of radiation based on an accumulated dose of the detected radiation and to notify the radiation generating apparatus of an instruction to stop the application of radiation in a case where it is determined to stop the application of radiation, a plurality of memories, and a memory control unit that stores, in a first memory from among the plurality of memories, data to be used when the automatic exposure control unit makes the determination.

Provided is a pixel sensing circuit, including a signal generation sub-circuit, a reset sub-circuit, an amplification sub-circuit, and a read sub-circuit. The reset sub-circuit is configured to provide a signal of a first power supply line to a first node under control of a reset signal line. The signal generation sub-circuit is configured to detect a light signal and convert the detected light signal into an electrical signal. The amplification sub-circuit is configured to provide an amplified electrical signal to a second node according to a signal provided by a second power supply line and under control of the first node. The read sub-circuit is configured to output the amplified electrical signal to a signal read line under control of a scan signal line.

A PET detecting device may include a plurality of detection modules and a processing engine. Each of the plurality of detection modules may include a scintillator array, one or more photoelectric converters, one or more energy information determination circuits and a time information determination circuit. The scintillator array may interact with a plurality of photons at respective interaction points to generate a plurality of optical signals. The one or more photoelectric converters may convert the plurality of optical signals to one or more electric signals that each include an energy signal and a time signal. The one or more energy information determination circuits may generate energy information based on the one or more energy signals. The time information determination circuit may generate time information based on the one or more time signals. The processing engine may generate an image based on the energy information and the time information.

The present invention relates to a combined imaging detector (10, 20) for detection of gamma and x-ray quanta comprising an integrating x-ray detector (11) comprising a first scintillator layer (12) and a photodetector array (13) and a second structured scintillator layer (14), optionally as part of a second gamma detector having a second photodetector array. The combined imaging detector can be used for X-ray and SPECT detection and uses the principle of current flat x-ray detectors. Different resolutions are used: high spatial resolution for x-ray imaging and low spatial resolution for SPECT imaging.

A scintillation block detector employs an array of optically air coupled scintillation pixels, the array being wrapped in reflector material and optically coupled to an array of silicon photomultiplier light sensors with common-cathode signal timing pickoff and individual anode signal position and energy determination. The design features afford an optimized combination of photopeak energy event sensitivity and timing, while reducing electronic circuit complexity and power requirements, and easing necessary fabrication methods. Four of these small blocks, or “miniblocks,” can be combined as optically and electrically separated quadrants of a larger single detector in order to recover detection efficiency that would otherwise be lost due to scattering between them. Events are validated for total energy by summing the contributions from the four quadrants, while the trigger is generated from either the timing signal of the quadrant with the highest energy deposition, the first timing signal derived from the four quadrant time-pickoff signals, or a statistically optimum combination of the individual quadrant event times, so as to maintain good timing for scatter events. This further reduces the number of electronic channels required per unit detector area while avoiding the timing degradation characteristic of excessively large SiPM arrays.

A radiation detection apparatus can include a scintillator to emit scintillating light in response to absorbing radiation; a photosensor to generate an electronic pulse in response to receiving the scintillating light; an analyzer to determine a characteristic of the radiation; and a housing that contains the scintillator, the photosensor, and the analyzer, wherein the radiation detection apparatus to is configured to allow functionality be changed without removing the analyzer from the housing. The radiation detection apparatus can be more compact and more rugged as compared to radiation detection apparatuses that include a photomultiplier tube.

A method is provided for determining the dose rate {dot over (H)} of nuclear radiation field, namely a gamma radiation field, with a radiation detection system (RDS), comprising a scintillator, a photodetector, an amplifier and a pulse measurement electronics. The pulse measurement electronics includes a sampling analog to digital converter, where the nuclear radiation deposes at least some of its energy in the scintillator, thereby producing excited states in the scintillation material, with the excited states decaying thereafter under emission of photons with a decay time τ. Photons are absorbed by the photodetector under emission of electrons, those electrons forming a current pulse, said current pulse being amplified so that the resulting current signal can be processed further in order to determine the charge of the pulse measured.

The invention relates to a device for the detection of gamma rays coming from a source without image truncation and without image overlapping, comprising, at least, two detection cells and each of said cells comprising a detection space adapted to receive the gamma rays that penetrate through an opening, wherein said detection space comprises one or more detection assemblies, with some of said assemblies being positioned such that they stand in the way of the gamma rays coming into the overlap volume thereof.

A radiation imaging apparatus includes a pixel array, a bias line, a plurality of drive lines, and a driving unit configured to cyclically supply an ON voltage to the drive lines. The radiation imaging apparatus also includes an acquiring unit configured to acquire a plurality of signal values by acquiring a signal value representing a current flowing through the bias line at each of a plurality of times within a period in which the ON voltage is continuously supplied to at least one of the plurality of drive lines, and a processing unit configured to specify an outlier in the plurality of signal values and determine whether or not there is a radiation irradiation with respect to the pixel array based on a signal value among the plurality of signal values that is not an outlier, and without being based on the outlier.