Patent application number | Description | Published |
20080203309 | Digital silicon photomultiplier for TOF-PET - A radiation detector includes an array of detector pixels each including an array of detector cells. Each detector cell includes a photodiode biased in a breakdown region and digital circuitry coupled with the photodiode and configured to output a first digital value in a quiescent state and a second digital value responsive to photon detection by the photodiode. Digital triggering circuitry is configured to output a trigger signal indicative of a start of an integration time period responsive to a selected number of one or more of the detector cells tranisitioning from the first digital value to the second digital value. Readout digital circuitry accumulates a count of a number of transitions of detector cells of the array of detector cells from the first digital state to the second digital state over the integration time period. | 08-28-2008 |
20080272296 | Data Processing Device, Tomography Apparatus for Examination of an Object of Interest, Method of Examining an Object of Interest, Computer-Readable Medium and Program Element - A data processing device, comprising a plurality of emitter antennas ( | 11-06-2008 |
20080284428 | Pet/Mr Scanner with Time-of-Flight Capability - In a combined scanner, a main magnet ( | 11-20-2008 |
20090065704 | IMPLEMENTATION OF AVALANCHE PHOTO DIODES IN (BI) CMOS PROCESSES - A radiation detector ( | 03-12-2009 |
20090127467 | Modular Signal Processing Backbone For Pet - An imaging system ( | 05-21-2009 |
20090236532 | TIME OF FLIGHT MEASUREMENTS IN POSITRON EMISSION TOMOGRAPHY - A positron emission tomography apparatus ( | 09-24-2009 |
20100127314 | PHOTODIODES AND FABRICATION THEREOF - A photodiode includes an anode ( | 05-27-2010 |
20100176301 | HIGH RESOLUTION MEDICAL IMAGING DETECTOR - A detector arrangement providing imaging information at the edge of the scintillator is provided. The detector arrangement provides complete information and improved spatial resolution. SiPMs can be used in place of PMTs in order to provide the geometrical coverage of the scintillator and improved spatial resolution. With such detector arrangements, the spatial resolution can be under 2 mm. Furthermore, the overall thickness of the detector can be substantially reduced and depth of interaction resolution is also improved. | 07-15-2010 |
20100182011 | PHOTODIODE SELF-TEST - A photodetector array ( | 07-22-2010 |
20100200763 | SILICON PHOTOMULTIPLIER ENERGY RESOLUTION - A family of photodetectors includes at least first and second members. In one embodiment, the family includes members having different pixel sizes. In another, the family includes members having the same pixel size. The detection efficiency of the detectors is optimized to provide a desired energy resolution at one or more energies of interest. | 08-12-2010 |
20100252723 | DIGITAL SILICON PHOTOMULTIPLIER FOR TOF-PET - A radiation detector includes an array of detector pixels each including an array of detector cells. Each detector cell includes a photodiode biased in a breakdown region and digital circuitry coupled with the photodiode and configured to output a first digital value in a quiescent state and a second digital value responsive to photon detection by the photodiode. Digital triggering circuitry is configured to output a trigger signal indicative of a start of an integration time period responsive to a selected number of one or more of the detector cells transitioning from the first digital value to the second digital value. Readout digital circuitry accumulates a count of a number of transitions of detector cells of the array of detector cells from the first digital state to the second digital state over the integration time period. | 10-07-2010 |
20110017918 | SINGLE PHOTON RADIATION DETECTOR - The invention relates to a radiation detector ( | 01-27-2011 |
20110079727 | SILICON PHOTOMULTIPLIER READOUT CIRCUITRY - A photon-counting Geiger-mode avalanche photodiode intensity imaging array includes an array of pixels ( | 04-07-2011 |
20110133091 | DIGITAL SILICON PHOTOMULTIPLIER FOR TOF-PET - A radiation detector includes an array of detector pixels each including an array of detector cells. Each detector cell includes a photodiode biased in a breakdown region and digital circuitry coupled with the photodiode and configured to output a first digital value in a quiescent state and a second digital value responsive to photon detection by the photodiode. Digital triggering circuitry is configured to output a trigger signal indicative of a start of an integration time period responsive to a selected number of one or more of the detector cells transitioning from the first digital value to the second digital value. Readout digital circuitry accumulates a count of a number of transitions of detector cells of the array of detector cells from the first digital state to the second digital state over the integration time period. | 06-09-2011 |
20110233413 | SILICON PHOTOMULTIPLIER TRIGGER NETWORK - An apparatus ( | 09-29-2011 |
20110240864 | AUTONOMOUS DETECTOR MODULE AS A BUILDING BLOCK FOR SCALABLE PET AND SPECT SYSTEMS - When detecting scintillation events in a nuclear imaging system, time-stamping and energy-gating processing is incorporated into autonomous detection modules (ADM) ( | 10-06-2011 |
20110240865 | HIGH DYNAMIC RANGE LIGHT SENSOR - When detecting photons in a computed tomography (CT) detector, a sensor ( | 10-06-2011 |
20110248175 | TEMPERATURE COMPENSATION CIRCUIT FOR SILICON PHOTOMULTIPLIERS AND OTHER SINGLE PHOTON COUNTERS - A PET scanner ( | 10-13-2011 |
20110249148 | CMOS IMAGER WITH SINGLE PHOTON COUNTING CAPABILITY - A color imaging device comprises: one or more arrays ( | 10-13-2011 |
20110278466 | DIGITAL SILICON PHOTOMULTIPLIER FOR TOF-PET - A radiation detector includes an array of detector pixels each including an array of detector cells. Each detector cell includes a photodiode biased in a breakdown region and digital circuitry coupled with the photodiode and configured to output a first digital value in a quiescent state and a second digital value responsive to photon detection by the photodiode. Digital triggering circuitry is configured to output a trigger signal indicative of a start of an integration time period responsive to a selected number of one or more of the detector cells transitioning from the first digital value to the second digital value. Readout digital circuitry accumulates a count of a number of transitions of detector cells of the array of detector cells from the first digital state to the second digital state over the integration time period. | 11-17-2011 |
20110291017 | ADVANCED TEMPERATURE COMPENSATION AND CONTROL CIRCUIT FOR SINGLE PHOTON COUNTERS - A PET scanner ( | 12-01-2011 |
20120001075 | METHOD TO OPTIMIZE THE LIGHT EXTRACTION FROM SCINTILLATOR CRYSTALS IN A SOLID-STATE DETECTOR - A light transmitting element such as a scintillating element ( | 01-05-2012 |
20120068077 | METHOD TO IMPROVE THE TIME RESOLUTION OF DIGITAL SILICON PHOTOMULTIPLIERS - A radiation detector module ( | 03-22-2012 |
20120129274 | PHOTODIODE SELF-TEST - A photodetector array includes a plurality of photodetector cells such as avalanche photodiodes and readout circuits. An array self-tester tests a dark count or other performance characteristic of the cells. The test is performed in connection with the manufacture of the array or following the installation of the array in a detection system. | 05-24-2012 |
20140021356 | DETECTOR ARRAY WITH TIME-TO-DIGITAL CONVERSION HAVING IMPROVED TEMPORAL ACCURACY - A detector ( | 01-23-2014 |
20140175294 | POSITION-SENSITIVE READOUT MODES FOR DIGITAL SILICON PHOTOMULTIPLIER ARRAYS - A photon detector ( | 06-26-2014 |
20140336987 | METHOD TO IMPROVE THE TIME RESOLUTION OF DIGITAL SILICON PHOTOMULTIPLIERS - A radiation detector module for use in a time-of-flight positron emission tomography (TOF-PET) scanner generates a trigger signal indicative of a detected radiation event. A timing circuit including a first time-to-digital converter (TDC) and a second TDC is configured to output a corrected timestamp for the detected radiation event based on a first timestamp determined by the first TDC and a second timestamp determined by the second TDC. The first TDC is synchronized to a first reference clock signal and the second TDC is synchronized to a second reference clock signal, the first and second reference clock signals being asynchronous. | 11-13-2014 |
20150076357 | ADVANCED TEMPERATURE COMPENSATION AND CONTROL CIRCUIT FOR SINGLE PHOTON COUNTERS - A PET scanner includes a ring of detector modules encircling an imaging region. Each of the detector modules includes one or more sensor avalanche photodiodes (APDs) that are biased in a breakdown region in a Geiger mode. The sensor APDs output pulses in response to light from a scintillator corresponding to incident photons. A reference APD also biased in a breakdown region in a Geiger mode is optically shielded from light and outputs a voltage that is measured by an analog to digital converter. Based on the measurement, a bias control feedback loop directs a variable voltage generator to adjust a bias voltage applied to the APDs such that a difference between a voltage of a breakdown pulse and a preselected logic voltage level is minimized. | 03-19-2015 |