Abstract: A radiation detection system can include a scintillating member including a polymer matrix, a first scintillating material, and a second scintillating material different from the first scintillating material and at least one photosensor coupled to the scintillating member. The radiation detection system can be configured to receive particular radiation at the scintillating member, generate a first light from the first scintillating material and a second light from the second scintillating material in response to receiving the particular radiation, receive the first and second lights at the at least one photosensor, generate a signal at the photosensor, and determine a total effective energy of the particular radiation based at least in part on the signal. Practical applications of the radiation detection system can include identifying a particular isotope present within an object, identifying a particular type of radiation emitted by the object, or locating a source of radiation within the object.

Abstract: A method for locally resolved measurement of a radiation distribution (24) produced using a lithography mask (16) comprises providing a radiation converter (31, 131) having an at least two-dimensional arrangement of converter elements (32, 132) which can respectively be put in an active and a passive state, and are configured to convert incoming radiation in respect of its wavelength in the active state. The method further includes: manipulating the radiation converter (31, 131) several times such that respectively only a fraction of the converter elements (32, 132) adopts the active state, irradiating the radiation converter (31, 131) with the radiation distribution (24) after every manipulation of the radiation converter (31, 131) so that the active converter elements (32, 132) emit wavelength-converted is measuring radiation (34), recording respective places of origin (54) of the measuring radiation at every irradiation with the radiation distribution (24).

Abstract: A method for cardiac imaging is provided, including administering to an adult human subject an amount of a teboroxime species having a radioactivity of less than 5 mCi at a time of administration, and performing a SPECT imaging procedure of a cardiac region of interest (ROI) of the subject. Other embodiments are also described.

Abstract: A vertical radiation sensitive detector array (114) includes at least one detector leaf (118). The detector leaf includes a scintillator array (210, 502, 807, 907), including, at least, a top side (212) which receives radiation, a bottom side (218) and a rear side (214) and a photo-sensor circuit board (200, 803, 903), including a photo-sensitive region (202, 508, 803, 903), optically coupled to the rear side of the scintillator array. The detector leaf further includes processing electronics (406) disposed below the scintillator array, a flexible circuit board (220) electrically coupling the photo-sensitive region and the processing electronics, and a radiation shield (236) disposed below the bottom of the scintillator array, between the scintillator and the processing electronics, thereby shielding the processing electronics from residual radiation passing through the scintillator array. Some embodiments incorporate rare earth iodides such as SrI 2 (Eu).

Abstract: A method of inspecting a synthetic silica glass molded body includes: irradiating the synthetic silica glass molded body with a spectrum line of an Hg lamp having a wavelength of 248 nm; measuring light emitted by the synthetic silica glass molded body; and a procedure which may include screening a portion which satisfies a condition that a ratio of the bright line intensity and the fluorescent light intensity is of a certain value or less, or which may include determining whether a condition that a ratio of a minimum value and a maximum value of a measured fluorescent light intensity is in a certain range is satisfied or not.

Abstract: A method and system for nuclear imaging normally involves detection of energy by producing bursts of photons in response to interactions involving incident gamma radiation. The detector sensitivity is increased by as much as two orders of magnitude, so that some excess sensitivity can be exchanged to achieve unprecedented spatial resolution and contrast-to-noise (C/N) ratio comparable to those in CT and MRI. Misplaced pileup events due to scattered radiation are rejected for each of the central groups to reduce image blurring, thereby further improving image quality. The reduction in detector thickness minimizes depth-of-interaction (DOI) blurring as well as blurring due to Compton-scattered radiation. The spatial sampling of the detector can be further increased using fiber optic coupling to reduce effective photodetector size. Fiber-optic coupling also enables to increase the packing fraction of PMTs to 100% by effectively removing the glass walls.

Abstract: In a PET device according to an embodiment, a first detector includes a plurality of first scintillators and detects gamma rays that are emitted from positron-emitting radionuclides that are injected into a subject. A second detector is provided on the outer circumferential side of the first detector, includes a plurality of second scintillators arranged in an arrangement surface density lower than that of the first scintillators, and detects gamma rays that have passed through the first detector. A counted information acquiring unit acquires, as first counted information and second counted information, the detection positions, energy values, and detection time regarding gamma rays detected by the first detector and the second detector.

Abstract: Various embodiments relate to a method of attenuation correction of Positron Emission Tomography (PET) data based on Magnetic Resonance Tomography (MRT) data. A method of at least one embodiment further includes determining further data being indicative of an iterative cycle of a physiological observable of a patient and matching the PET data with the MRT data based on the further data.

Abstract: A radiation detection system can include a photosensor to receive light from a scintillator via an input and to send an electrical pulse at an output in response to receiving the light. The radiation detection system can also include a pulse analyzer that can determine whether the electrical pulse corresponds to a neutron-induced pulse, based on a ratio of an integral of a particular portion of the electrical pulse to an integral of a combination of a decay portion and a rise portion of the electrical pulse. Each of the integrals can be integrated over time. In a particular embodiment, the pulse analyzer can be configured to compare the ratio with a predetermined value and to identify the electrical pulse as a neutron-induced pulse when the ratio is at least the predetermined value.

Abstract: The present disclosure discloses, in one arrangement, a single crystalline chloride scintillator material having a composition of the formula A3MCl6, wherein A consists essentially of Cs and M consists essentially of Ce and Gd. In another arrangement, a chloride scintillator material is single-crystalline and has a composition of the formula AM2Cl7, wherein A consists essentially of Li, Na K, Rb, Cs or any combination thereof, and M consists essentially of Ce, Sc, Y, La, Lu, Gd, Pr, Tb, Yb, Nd or any combination thereof. Specific examples of these scintillator materials include single-crystalline Ce-doped KGd2Cl7 (KGd2(1-x)Ce2xCl7) and Ce-doped CsGd2Cl7(CsGd2(1-x)Ce2xCl7).

Abstract: A method of minimizing the orientation dependence of an automatic drift compensation of a scintillation counter having a rod-shaped scintillator is provided. The cosmic radiation energy spectrum is analyzed above a predefined energy threshold value for the automatic drift compensation. A counting rate of particles having an energy deposition in the scintillator greater than an energy threshold value is controlled to a constant desired counting rate value. The method determines a first integral energy spectrum of the cosmic radiation while the scintillator is upright, and a second integral energy spectrum while the scintillator is in a horizontal position. An intersection point of the first and second integral energy spectrums is detected, and the energy threshold value of the drift compensation is set to the energy threshold value pertaining to the intersection point and the desired counting rate value is set to the counting rate pertaining to the intersection point.

Abstract: An emission tomography device includes emission detectors for detecting a gamma ray incident from a patient body as a pulse signal, and a data collecting device for collecting information in which the gamma ray is detected in an emission detector. The data collecting device includes a timing circuit for outputting timing information corresponding to the timing of occurrence of an event in which a gamma ray is detected as a pulse signal in an emission detector, a simultaneous count circuit for identifying timing information in a true simultaneous count by comparing a plurality of timing information sent from a plurality of timing circuits, and a pulse calculating portion calculating a gamma ray detection location and a gamma ray energy from an intensity value of a pulse signal corresponding to the timing information identified by the simultaneous count circuit as a true simultaneous count.

Abstract: The technical solution as put forth by the present invention comprises a computer imaging system and detectors arranged around the detected object for collecting gamma photons from positron annihilation events. The key is a multi-pinhole plate placed between the detected object and the detectors, and the multi-pinhole plate can be a coded aperture mask coded by using a function h(x,y). The gamma photons generated from the annihilation events inside the detected object are absorbed by the detector after being collimated by the multi-pinhole plate. Accordingly, after the detectors have performed detection at multiple angles, the result is transmitted to the computer imaging system, and quasi three-dimensional images are generated after being processed by the disclosed algorithm. Furthermore, the quasi three-dimensional images generate secondary projection images and, after adjustment, generate sinograms, and finally three-dimensional tomographic images are reconstructed from multiple sinograms.

Abstract: Provided is an analysis apparatus for a high energy particle and an analysis method for a high energy particle. The analysis apparatus for the high energy particle includes a scintillator generating photons with each unique wavelength by the impinging with a plurality of kinds of accelerated high energy particles, a parallel beam converting unit making the photons proceed in parallel to one another, a diffraction grating panel making the photons proceeding in parallel to one another enter at a certain angle, and refracting the photons at different angles depending on each unique wavelength, and a plurality of sensing units arranged on positions where the photons refracted at different angles from the diffraction grating panel reach in a state of being spatially separated, and detecting each of the photons.

Abstract: A system for assaying radiation includes a sample holder configured to hold a liquid scintillation solution. A photomultiplier receives light from the liquid scintillation solution and generates a signal reflective of the light. A control circuit biases the photomultiplier and receives the signal from the photomultiplier reflective of the light. A light impermeable casing surrounds the sample holder, photomultiplier, and control circuit. A method for assaying radiation includes placing a sample in a liquid scintillation solution, placing the liquid scintillation solution in a sample holder, and placing the sample holder inside a light impermeable casing. The method further includes positioning a photomultiplier inside the light impermeable casing and supplying power to a control circuit inside the light impermeable casing.

Abstract: An imaging system (100) includes a radiation sensitive detector array (110). The detector array includes at least two scintillator array layers (116). The detector array further includes at least two corresponding photosensor array layers (114). At least one of the at least two photosensor array layers is located between the at least two scintillator array layers in a direction of incoming radiation. The at least one of the at least two photosensor array layers has a thickness that is less than thirty microns.

Abstract: A radiation detector made of High Purity Germanium (HPGe) has been specially machined to be this invented multilayer Inter-Coaxial configuration. With this special configuration, extra large volume HPGe detectors of diameters to be 6 inches, 9 inches, and even 12 inches, can be produced with current achievable HPGe crystal purity and quality, in which the entire detector crystal will be depleted and properly over biased for effective photo-induced signal collection with just less than 5000V bias applied. This invention makes extra large efficiency of 200%, 300%, and maybe even higher than 500% possible with HPGe gamma ray detectors with reasonable great resolution performances procurable based on current HPGe crystal supply capability. The invention could also be applied to any other kind of semiconductor materials if any of them could be purified enough for this application in the future.

Abstract: A radiation imaging system includes a radiation imaging cassette and a console device. A communication mode between the cassette and the console device is switchable between a wired mode and a wireless mode. Due to shortage of a battery of the cassette, the communication mode is switched to the wired mode to start charging the battery and send image data from the cassette to the console device through a cable. The console device has first and second judging sections. The first judging section judges whether or not a charge level of the battery exceeds a predetermined threshold value. The second judging section judges whether or not radiography is in progress. If it is judged that the charge level of the battery exceeds the predetermined threshold value and the radiography is not in progress, a window that indicates permission for switching to the wireless mode is displayed on a monitor.

Abstract: Methods and apparatus for system identification operate by computing phase and amplitude using linear filters. By digitally processing the linearly filtered signals or data, the phase and amplitude based on measurements of the input and output of a system, are determined.

Abstract: A radiation detector can include a photosensor to receive light via an input and to send an electrical pulse via an output in response to receiving the light. The radiation detector can also include a pulse analyzer to send an indicator to a pulse counter when the electrical pulse corresponds to a scintillation pulse and to not send the indicator to the pulse counter when the electrical pulse corresponds to a noise pulse. The pulse analyzer can be coupled to the output of the photosensor. A method can include receiving an electrical pulse at a pulse analyzer from an output of a photosensor and determining whether the electrical pulse corresponds to a scintillation pulse or a noise pulse, based on a pulse shape of the electrical pulse. The method can also include sending the electrical pulse to a pulse counter when the electrical pulse corresponds to a scintillation pulse.

Abstract: A radiation detector system/method implementing a corrected energy response detector is disclosed. The system incorporates charged (typically tungsten impregnated) injection molded plastic that may be formed into arbitrary detector configurations to affect radiation detection and dose rate functionality at a drastically reduced cost compared to the prior art, while simultaneously permitting the radiation detectors to compensate for radiation intensity and provide accurate radiation dose rate measurements. Various preferred system embodiments include configurations in which the energy response of the detector is nominally isotropic, allowing the detector to be utilized within a wide range of application orientations. The method incorporates utilization of a radiation detector so configured to compensate for radiation counts and generate accurate radiation dosing rate measurements.

Abstract: A subatomic particle detection apparatus includes a scintillator to scintillate if struck by subatomic particles, and to scintillate if subjected to mechanical stresses, the scintillator to emit an electrical discharge if scintillating due to the mechanical stresses. A detector is optically coupled to the scintillator to detect scintillations by the scintillator. Furthermore, an antenna is associated with the scintillator and/or the detector to detect the electrical discharge. In addition, circuitry is coupled to the detector and the antenna to determine whether the scintillator scintillated due to the mechanical stresses, based upon the antenna detecting the electrical discharge.

Abstract: Polymer composite neutron detector materials are described. The composite materials include an aromatic polymer matrix, such as an aromatic polyester. Distributed within the polymer matrix are neutron capture agents, such as 6LiF nanoparticles, and organic or inorganic luminescent fluors. The composite materials can be formed into stretched or unstretched thin films, fibers or fiber mats.

Abstract: Provided are a radioactive contamination monitoring device and a radioactive contamination monitoring method for enabling easy detection of radiation from an object to be monitored in a little surrounding space. The radioactive contamination monitoring device comprises a radiation detection unit, a photoelectric conversion unit for converting the light generated in the radiation detection unit to electricity, and a signal processing unit connected to the photoelectric conversion unit. The radiation detection unit includes a quadrangular prism-shaped light guide bar having a rectangular cross-section and a scintillator attached only to two adjacent side faces of the four side faces of the light guide bar.

Abstract: A neutron detector is provided which may include a neutron converting layer, and a scintillator layer adjacent the neutron converting layer. The neutron detector may further include a photomultiplier adjacent the scintillator layer. By way of example, the neutron detector may be used in a well logging apparatus to determine a neutron flux incident upon the neutron converting layer, and thereby determine the neutron porosity of a geological formation around a wellbore.

Abstract: A method and system for determining timing recovery information in a positron emission tomography (PET) system. One method includes determining energy information from pairs of light sensors of detectors of the TOF PET system, determining timing information from the pairs of light sensors of the detectors of the TOF PET system and calculating timing recovery information using the determined energy and timing information.

Abstract: When constructing a nuclear detector module in a gantry, a plurality of overlapping light guide modules (10) are mounted to the gantry in a spaced-apart fashion, and a plurality of underlapping light guide modules (12) are mounted in between each pair of overlapping light guide modules (10). Each of the underlapping modules and the overlapping modules includes a scintillation crystal array (16) on an interior surface thereof, and a plurality of PMTs on an exterior surface thereof. Overlapping modules (10) have overlapping structures (22) that interface with underlapping structures (18) on the underlapping modules (12) and thereby eliminate a seam directly beneath PMTs that overlap the crystal arrays of both an overlapping module and an underlapping module. Optical grease is used to form a resilient grease coupling and reduce light scatter between the underlapping and overlapping modules.

Abstract: According to example embodiments, a photomultiplier detector cell for tomography includes a detector unit and a readOUT unit. The detector unit is configured to generate a digitized detect signal in response to receives light having a certain range of wavelength. The readOUT unit is configured to generate an output signal corresponding to the detect signal generated by the detector unit and to transmit the output signal to an external circuit. The readOUT unit is configured to transmit the output signal to the external circuit right after the detect signal is received.

Abstract: Systems and methods for attenuation compensation in nuclear medicine imaging based on emission data are provided. One method includes acquiring emission data at a plurality of energy windows for a person having administered thereto a radiopharmaceutical comprising at least one radioactive isotope. The method also includes performing a preliminary reconstruction of the acquired emission data to create one or more preliminary images of a peak energy window and a scatter energy window and determining a body outline of the person from at least one of the reconstructed preliminary image of the peak energy window or of the scatter energy window. The method further includes identifying a heart contour and segmenting at least the left lung. The method additionally includes defining an attenuation map based on the body outline and segmented left lung and reconstructing an image of a region of interest of the person using an iterative joint estimation reconstruction.

Abstract: Systems and methods are described herein for performing three-dimensional imaging using backscattered photons generated from a positron-electron annihilation. The systems and methods are implemented using the pair of photons created from a positron-electron annihilation. The trajectory and emission time of one of the photons is detected near the annihilation event. Using this collected data, the trajectory of the second photon can be determined. The second photon is used as a probe photon and is directed towards a target for imaging. The interaction of the second probe photon with the target produces back scattered photons that can be detected and used to create a three-dimensional image of the target. The systems and methods described herein are particularly advantageous because they permit imaging with a system from a single side of the target, as opposed to requiring imaging equipment on both sides of the target.

Abstract: A method for real-time RL and/or ROSL dose rate measuring in an environment exposed to a radiation source(s). The method comprises the steps of exposing a dosimeter to the environment for irradiation by the radiation source(s), the dosimeter comprising a phosphor-doped fluoroperovskite compound, sensing the RL or ROSL emitted light from the dosimeter during irradiation by the radiation source(s) and generating a representative light detection signal, and recording or generating a real-time measure of dose rate in the environment based on the light detection signal. A radiation dosimeter detection system comprising a phosphor-doped fluoroperovskite compound, the dosimeter coupled to a detector by an optical fibre. The detector comprises first and second optical stimulation sources that transmit light over the optical fibre to the dosimeter in first and second wave-length ranges. An optical detector senses light emitted from the dosimeter from which read-out dose information is generated.

Abstract: A radiation detector includes a conversion element that converts an incoming radiation beam into electrical signals, which in turn can be used to generate data about the radiation beam. The conversion element may include, for example, a scintillator that converts the radiation beam into light, and a sensor that generates the signals in response to the light. The conversion element can be used in different schemes or data collection modes. For instance, the conversion element can be oriented normal to the radiation beam or transverse to the radiation beam. In either of these orientations, for example, the detector can be used in an integrating mode or in a counting mode.

Abstract: An apparatus for determining a direction of travel of a neutron emitted from a source includes: a chamber containing (i) nuclei that recoil upon interaction with an incoming neutron and (ii) atoms capable of being ionized by the recoiled nuclei thereby releasing electrons; an electron-interaction material disposed at the chamber and configured to receive electrons released by the ionized atoms and to emit photons upon the interaction with the received electrons; an imager configured to form an image of photons emitted by the electron-interaction material, wherein the image comprises a path having the direction of travel of the incoming neutron; and an orientation sensor configured to sense an orientation of the imager in order to relate the direction of travel of the incoming neutron to the orientation of the imager.

Abstract: When detecting photons in a computed tomography (CT) detector, a sensor (10, 38) includes a photodiode that is switchable between liner and Geiger operation modes to increase sensing range. When signal to noise ratio (SNR) is high, a large bias voltage is applied to the photodiode (12) to charge it beyond its breakdown voltage, which makes it sensitive to single photons and causes it to operate in Geiger mode. When a photon is received at the photodiode (12), a readout transistor (18) senses the voltage drop across the photodiode (12) to detect the photon. Alternatively, when SNR is low, a low bias voltage is applied to the photodiode (12) to cause it to operate in linear mode.

Abstract: A method of correcting a timing signal that represents an arrival time of a photon at a positron emission tomography (PET) detector includes receiving a timing signal that represents an arrival time of a photon at a PET detector, receiving an energy signal indicative of an energy of the photon, calculating a timing correction using the energy signal, modifying the timing signal using the timing correction, and generating an image of an object using the modified timing signal. A system and non-transitory computer readable medium are also described herein.

Abstract: Systems and methods for determining fluid mobility in rock samples using time-lapse position emission particle tracking (PEPT). The systems and methods use PEPT to determine permeability in rock samples, such as shale, that have a permeability of less than one micro-darcy by recording gamma-ray emissions from a tag using a positron emission tomography camera as the tag traverses with a fluid through the pores in the rock sample.

Abstract: A detector and methods for producing x-ray images, more particularly based on x-rays transmitted through an inspected object. A scintillating region is translated along a path within a cross section of a beam, the cross section taken in a plane distal to the object with respect to a source of the beam. Light emitted by the scintillator region is detected, thereby generating a detection signal, the detection signal is received by a processor which generates an image signal, and an image depicting transmitted penetrating radiation is formed on the basis of the image signal.

Abstract: Present embodiments relate to the calibration of detectors having one or more arrays of pixelated detectors. According to an embodiment, a method includes detecting optical outputs generated by a plurality of scintillation crystals of a detector with an array of pixelated detectors, generating, with the array of pixelated detectors, respective signals indicative of the optical outputs, generating, from the respective signals, a unique energy spectrum correlated to each of the plurality of scintillation crystals, grouping subsets of the plurality of scintillation crystals into macrocrystals, determining a representative energy spectrum peak for each macrocrystal based on the respective energy spectra of the scintillation crystals in the macrocrystal, comparing a value of the representative energy spectrum peak for each macrocrystal with a target peak value, and adjusting an operating parameter of at least one pixelated detector in the array of pixelated detectors as a result of the comparison.

Abstract: The present invention comprises a spectrometer (100) for detecting a source of radioactive emissions having a detector (120) that produces a detector signal (20), with an amplifier (30) followed by a single digitizer (40) followed by a digital signal processing unit (50), within which the signal processing implements two distinct pathways (51, 52), and associated firmware to utilize the two resulting sets of processed data in nuclear isotope identification.

Abstract: A radiation sensor including a scintillation layer configured to emit photons upon interaction with ionizing radiation and a photodetector including in order a first electrode, a photosensitive layer, and a photon-transmissive second electrode disposed in proximity to the scintillation layer. The photosensitive layer is configured to generate electron-hole pairs upon interaction with a part of the photons. The radiation sensor includes pixel circuitry electrically connected to the first electrode and configured to measure an imaging signal indicative of the electron-hole pairs generated in the photosensitive layer and a planarization layer disposed on the pixel circuitry between the first electrode and the pixel circuitry such that the first electrode is above a plane including the pixel circuitry. A surface of at least one of the first electrode and the second electrode at least partially overlaps the pixel circuitry and has a surface inflection above features of the pixel circuitry.

Abstract: A material according to one embodiment exhibits an optical response signature for neutrons that is different than an optical response signature for gamma rays, said material exhibiting performance comparable to or superior to stilbene in terms of distinguishing neutrons from gamma rays, wherein the material is not stilbene, the material comprising a molecule selected from a group consisting of: two or more benzene rings, one or more benzene rings with a carboxylic acid group, one or more benzene rings with at least one double bound adjacent to said benzene ring, and one or more benzene rings for which at least one atom in the benzene ring is not carbon.

Abstract: A method and system for nuclear imaging normally involve detection of energy by producing at most two or three bursts of photons at a time in response to events including incident gamma radiation. F number of sharing central groups of seven photodetectors, depending on the photodetector array size, is arranged in a honeycomb array for viewing zones of up to F bursts of optical photons at a time for each continuous detector and converting the bursts of optical photons into signal outputs, where each of the central groups is associated with a zone. This enables the detector sensitivity to be increased by as much as two orders of magnitude, and to exchange some of this excess sensitivity to achieve spatial resolution comparable to those in CT and MRI, which would be unprecedented. Signal outputs that are due to scattered incident radiation are rejected for each of the central groups to reduce image blurring, thereby further improving image quality.

Abstract: A method for cardiac imaging is provided, including administering to an adult human subject an amount of a teboroxime species having a radioactivity of less than 5 mCi at a time of administration, and performing a SPECT imaging procedure of a cardiac region of interest (ROI) of the subject. Other embodiments are also described.

Abstract: A variety of methods and systems are described that relate to reducing optical noise. In at least one embodiment, the method includes, emitting a first light having a selected wavelength from a light source, receiving a reflected first light onto a phosphor-based layer positioned inside a receiver, the reflected first light being at least some of the emitted first light that has been reflected by an object positioned outside of a desired target location. The method further includes, shifting the wavelength of the received reflected first light due to an interaction between the received reflected first light and the phosphor-based layer, and passing the received reflected first light with respect to which the wavelength has been shifted through a light detector without detection.

Abstract: A light transmitting element such as a scintillating element (50) or an optic fiber (50?) has side surfaces coated with a metamaterial (62) which has an index of refraction less than 1 and preferably close to zero to light transmitted in the light transmitting element. A photonic crystal (80) or metamaterial layer optically couples a light output face of the light transmitting element with a light sensitive element (52), such as a silicon photomultiplier (SiPM). A thin metal layer (64) blocks optical communication between adjacent scintillating elements (50) in a radiation detector (22), such as a radiation detector of a nuclear imaging system (10).

Abstract: Methods and apparatus for a radiation monitor. In one embodiment, a radiator monitor comprises a housing, a detector material having an adjustable density in the housing, an optical coupler adjacent the detector material to receive Cherenkov energy generated in the detector material, a photodetector coupled to the optical coupler, and a processing module coupled to the photodetector to determine whether a detection threshold is exceeded.

Abstract: The invention relates to a radiation detector (100) and an associated method for the detection of (e.g. X or ?-) radiation. The detector (100) comprises a converter element (110) in which incident photons (X) are converted into electrical signals, and an array of anodes (130) for generating an electrical field (E) in the converter element (110). At least two anodes are associated with two steering electrodes (140) to which different potentials can be applied by a control unit (150). Preferably, each single anode or small group of anodes is surrounded by one steering electrode. The potentials of the steering electrodes (140) may be set as a function of the potentials that are induced in these electrodes when an operating voltage is applied between the anodes and a cathode (120). Moreover, a grid electrode (160) may be provided that at least partially encircles anodes (130) and their steering electrodes (140).

Abstract: A nuclear medical imaging system employing radiation detection modules with pixelated scintillator crystals includes a scatter detector (46) configured to detect and label scattered and non-scattered detected radiation events stored in a list mode memory (44). Coincident pairs of both scattered and non-scattered radiation events are detected and the corresponding lines of response (LOR) are determined. A first image representation of the examination region can be reconstructed using the LORs corresponding to both scattered and non-scattered detected radiation events to generate a lower resolution image (60) with good noise statistics. A second higher resolution image (62) of all or a subvolume of the examination region can be generated using LORs that correspond to non-scattered detected radiation events. A quantification processor is configured to extract at least one metric, e.g.

Abstract: A radiation detecting apparatus of this invention includes an arithmetic processing device which carries out arithmetic processes for drawing boundaries based on peaks of signal strengths and separating respective positions by the boundaries, and for determining, by using spatial periodicity of the peaks, the number of peaks having failed to be separated, with a plurality of peaks connecting to each other. If the separation fails with a plurality of peaks connecting to each other, the number of peaks in error is determined using spatial periodicity of the peaks. Thus, by using spatial periodicity of the peaks, the number of peaks in error can be determined and boundaries can be set easily. As a result, incident positions can also be discriminated easily, and detecting positions of radiation can be determined easily.

Abstract: An imaging method and apparatus are provided. The method includes collecting detector output data from a radiation detector positioned near a subject provided with a radio-active tracer The method further includes resolving individual signals in the detector output data by determining a signal form of signals present in the data, and making parameter estimates of one or more parameters of the signal. The one or more parameters include at least a signal temporal position. The method further includes determining the energy of each of the signals from at least the signal form and the parameter estimates.