Patent application number | Description | Published |
20080244228 | Electronic Device With an Array of Processing Units - The invention concerns electronics devices like X-ray detectors with an array of pixels ( | 10-02-2008 |
20080290280 | Scintillator for an X-Ray Detector with a Variable Reflector - The invention concerns an X-ray detector with a photo-sensitive detector layer ( | 11-27-2008 |
20090290050 | COMPENSATION OF LEAKAGE CURRENT AND RESIDUAL SIGNALS FOR INTEGRATING DETECTOR BASED ON DIRECT X-RAY CONVERSION - The application describes an X-ray detector, which uses direct X-ray conversion (DiCo) combined with CMOS pixel circuits. DiCo materials have to be used with high voltage to achieve a high field strength. This makes the sensor prone to leakage currents, which falsify the measured charge result. Moreover, most direct conversion materials suffer from large residual signals that lead to temporal artifacts (ghost images) in an X-ray image sequence. A circuit is described, which senses the sensor's dark current including residual signals from previous exposures before the sensor is exposed (again) to X-ray, and freezes relevant circuit parameters at the end of the sensing phase in such way, that the dark current (leakage current and residual signal) can still be drained during exposure. Therefore, the charge pulses generated in the sensor due to X-ray exposure can be integrated without charges carried by the leakage current or residual signal, thus obtaining a more accurate estimate of the deposited X-ray energy. | 11-26-2009 |
20100172467 | APPARATUS AND METHOD FOR GENERATING COUNTABLE PULSES FROM IMPINGING X-RAY PHOTONS; AND CORRESPONDING IMAGING DEVICE - The present invention relates to an apparatus ( | 07-08-2010 |
20100329421 | SUPPRESSION OF DIRECT DETECTION EVENTS IN X-RAY DETECTORS - According to an embodiment of the invention, signals coming from a number of pixels or sub-pixels are compared and those signals from pixels or sub-pixels, which are substantially brighter than the other pixels in the comparison, are excluded from contributing to the output signal, to suppress direct detection events in X-ray detectors. For this an X-ray detector apparatus ( | 12-30-2010 |
20110108735 | HIGH DYNAMIC RANGE X-RAY DETECTOR WITH IMPROVED SIGNAL TO NOISE RATIO - An x-ray detector and its pixel circuit are described, that allow to cover a large dynamic range with automatic selection of the sensitivity setting in each pixel, thus providing improved signal to noise ratio with all exposure levels. X-ray detectors are required to cover a large dynamic range. The largest exposure determines the required pixel capacitance. However, a large pixel capacitance gives a bad signal to noise ratio with small exposures e.g. in the dark parts of the image. This invention disclosure describes several approaches to provide automatic sensitivity selection in the pixels. This ensures that low signals are stored in a small capacitor or read out with a high sensitivity with corresponding good signal to noise ratio, while larger signals are stored in larger capacitors or are read out with lower sensitivity so that no information is lost. | 05-12-2011 |
20110240868 | X-RAY DETECTOR - The application describes an X-ray detector for use in a medical equipment, wherein the detector comprises an unit for transforming X-ray radiation into electrical charge, a first capacitor for being charged by an electrical charge, wherein the first capacitor is electrically connected to the unit for transforming, a second capacitor for being charged by an electrical charge, and a first gain switching gate, wherein the second capacitor is electrically connected with the unit for transforming if the first gain switching gate is in on-state, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further the application describes an X-ray system comprising a detector according to the invention, wherein the system is adapted for gain selection, wherein the detector is adapted to switch on the first gain switching gate for short periods. Further, the application describes a method for using a detector according to the inventive concept, wherein the first gain switching gate is switched on only for short periods of time for redistribution of electrical charge between the first capacitor and the second capacitor. | 10-06-2011 |
20120001084 | SPECTRAL IMAGING - A detector array ( | 01-05-2012 |
20120032085 | SPECTRAL IMAGING - An imaging system includes a scintillator array ( | 02-09-2012 |
20120080606 | PROCESSING CIRCUIT FOR AN X-RAY SENSOR - A processing circuit for an X-ray sensor for collecting at least a first pixel information of a first pixel and a second pixel information of a second pixel is provided. The processing circuit comprises an amplifier ( | 04-05-2012 |
20120205549 | DETECTOR UNIT FOR DETECTING ELECTROMAGNETIC RADIATION - According to an exemplary embodiment of the invention a detector unit | 08-16-2012 |
20130003928 | MULTIFRAME X-RAY DETECTOR FOR IMAGING SYSTEM WITH DISTRIBUTED X-RAY SOURCES - Device and method for synchronously switching activating a first and second charge accumulation section ( | 01-03-2013 |