Patent application number | Description | Published |
20110114845 | GAMMA RAY DETECTOR ELEMENTS WITH VARIABLE LIGHT GUIDE THICKNESS - A gamma ray detector module that includes at least one crystal element arranged in a plane, a plurality of light sensors arranged to cover the at least one crystal element and to receive light emitted from the at least one crystal element, and a light guide arranged between the at least one crystal element and the light sensors, the light guide being optically connected to the at least one crystal element. Further, the light guide includes a narrow portion that positions at least one light sensor of the plurality of light sensors closer to the at least one crystal element than other light sensors of the plurality of light sensors. In addition, the light guide may include an angled recessed portion that positions another light sensor at an oblique tilt angle with respect to the plane of the at least one crystal element. | 05-19-2011 |
20120091348 | SEGMENTED DETECTOR ARRAY - A radiation detector that includes multiple adjacent modular detector segments. Each segment includes an array of scintillation crystal elements, a light guide arranged adjacent to the array of scintillation crystal elements, and reflectors arranged around a periphery of the segment so that light produced by a scintillation event in the segment is substantially confined to the segment. In one embodiment, each segment is coupled to multiple photosensors, each photosensor receiving light from at least one of the segments. | 04-19-2012 |
20120091350 | PET DETECTOR SCINTILLATION LIGHT GUIDING SYSTEM HAVING FIBER-OPTICS PLATES - A positron emission tomography scanner system that includes detector modules arranged adjacent to one another to form a cylindrical detector ring. Each of the detector modules includes an array of scintillation crystal elements, a plurality of photosensors arranged to cover the array of crystal elements and configured to receive light emitted from the array of crystal elements, and a fiber optics plate arranged between the array of scintillation crystal elements and the plurality of photosensors, the fiber optics plate including a plurality of fibers configured to guide the light emitted from the scintillation crystal to the plurality of photosensors. | 04-19-2012 |
20120104268 | APPARATUS FOR FINE-DELAY ADJUSTMENTS OF ANALOG SIGNALS IN POSITRON EMITTER TOMOGRAPHY SENSORS - A variable delay device is connected to a photosensor of a time-of-flight gamma ray detection system and includes a substrate on which a plurality of conductive pins are affixed. A first terminal connected to a first of the plurality of pins and a second terminal connected to the second of the plurality of pins are also affixed to the substrate. A jumper electrically connects the plurality of pins at a predetermined distance relative to the substrate, and a time delay of the variable delay device is determined based on the electrical path between the first and second terminals formed by the plurality of pins and the jumper. | 05-03-2012 |
20120268303 | APPARATUS FOR DETECTION OF A LEADING EDGE OF A PHOTO SENSOR OUTPUT SIGNAL - A system and method for processing an analog signal output by a sensor. The system and method converting, using at least one analog-to-digital converter (ADC), the analog output signal to a digital signal, the digital signal including a plurality of samples at a predetermined resolution, detecting whether a trigger condition is met by analyzing the digital signal, detecting an event based on trigger information from the detecting whether a trigger condition is met, generating event information having time information included therein when the event is detected, defining one or more time windows based on the time information included in the event information, performing decimation on the digital signal based on the defined one or more time windows to generate a decimated signal, and outputting the decimated signal. | 10-25-2012 |
20120281956 | PET DETECTOR SCINTILLATION LIGHT GUIDING SYSTEM HAVING FIBER-OPTICS PLATES - A positron emission tomography scanner system that includes detector modules arranged adjacent to one another to form a cylindrical detector ring. Each of the detector modules includes an array of scintillation crystal elements, a plurality of photosensors arranged to cover the array of crystal elements and configured to receive light emitted from the array of crystal elements, and a fiber optics plate arranged between the array of scintillation crystal elements and the plurality of photosensors, the fiber optics plate including a plurality of fibers configured to guide the light emitted from the scintillation crystal to the plurality of photosensors. | 11-08-2012 |
20120305783 | PHOTOMULTIPLIER TUBE WITH INTEGRATED FAST ANALOG-TO-DIGITAL CONVERSION FOR EVENT DERANDOMIZER AND DIGITAL TIME STAMPING - A digital photosensor that includes a photomultiplier tube (PMT) including a power distribution circuit, the PMT outputting an analog signal in response to received light; an analog-to-digital converter (ADC) to receive the analog signal and to generate a digital signal; and a non-transitory memory storing manufacturing parameters of the PMT and operational parameters of the PMT, the operational parameters being calculated by a parameter calculation unit during operation of the PMT, wherein the PMT, the ADC, and the memory are integrated into a single housing | 12-06-2012 |
20130168534 | METHOD FOR TIMING-PICK-OFF OF UNDERSAMPLED PULSES FROM RADIATION DETECTORS - A process and device for generating a prototype waveform and a weighting function. The process including obtaining waveforms generated by a detector having at least one photosensor, generating an initial estimate for the prototype waveform and the weighting function and parameterizing the prototype waveform and the weighting function and determining for each waveform an optimal amplitude and an optimal time offset of the prototype waveform. Included are steps of pairing waveforms based on the determined time offsets of the waveforms, calculating an arrival time difference for each pair of waveforms and determining a timing resolution value based on the calculated arrival time differences, determining whether the timing resolution value meets predetermined minimization criteria, and updating the set of parameters for the prototype waveform and the weighting function and repeating the determining, pairing, calculating, and determining, when the timing resolution value fails to meet the predetermined minimization criteria. | 07-04-2013 |