Patent application number | Description | Published |
20100074397 | Method for detecting X-ray radiation and X-ray system - A method is disclosed for detecting X-ray radiation from an X-ray emitter. In at least one embodiment of the method, an electric pulse with a pulse amplitude characteristic of the energy of a quantum is generated when a quantum of the X-ray radiation impinges on a sensor, wherein a number of threshold energies are predetermined. When the pulse amplitude corresponding to the respective energy is exceeded, a signal is emitted each time the pulse amplitude corresponding to a respective threshold energy is exceeded. At least one embodiment of the method permits reliable and high-quality imaging, even in image regions with high X-ray quanta rates. To this end, at least one of the threshold energies is predetermined such that it is higher than the maximum energy of the X-ray spectrum emitted by the X-ray emitter. | 03-25-2010 |
20100127182 | X-ray radiation detector for use in a CT system - At least one embodiment of the invention relates to an X-ray radiation detector, in particular for use in a CT system. In at least one embodiment, the X-ray radiation detector includes a semiconductor material used for detection, at least two ohmic contacts between the semiconductor material and a contact material, the semiconductor material and contact material each having a specific excitation energy of the charge carriers, with the excitation energy of the contact material corresponding to the excitation energy of the semiconductor material. At least one embodiment of the invention furthermore relates to a CT system in which an X-ray radiation detector is used, the X-ray radiation detector advantageously having at least two ideal ohmic contacts according to at least one embodiment of the invention. | 05-27-2010 |
20100246758 | X-RAY RADIATION DETECTOR FOR DETECTING IONIZING RADIATION, IN PARTICULAR FOR USE IN A CT SYSTEM - An X-ray radiation detector is disclosed for detecting ionizing radiation, in particular for use in a CT system, with a multiplicity of detector elements. In at least one embodiment, each detector element includes a semiconductor used as detector material with an upper side facing the radiation and a lower side facing away from the radiation, at least two electrodes, wherein one electrode is formed on the upper side of the semiconductor by a metallization layer, and the sum of all detector elements forms a base, which has a base normal at each point. In at least one embodiment, the invention is distinguished by the fact that the upper side of the semiconductor has a surface structure with a surface normal at each point, wherein the surface normal at least in part subtends an angle to the base normal. In at least one embodiment, the invention furthermore relates to a CT system provided with an X-ray radiation detector, which advantageously includes a multiplicity of detector elements structured according to at least one embodiment of the invention. | 09-30-2010 |
20110253886 | X-Ray Detector Comprising A Directly Converting Semiconductor Layer And Calibration Method For Such An X-Ray Detector - An X-ray detector includes a directly converting semiconductor layer for converting an incident radiation into electrical signals with a band gap energy characteristic of the semiconductor layer, and at least one light source for coupling light into the semiconductor layer, wherein the generated light, for the simulation of incident X-ray quanta, has an energy above the band gap energy of the semiconductor layer. In at least one embodiment, it includes at least one evaluation unit for calculating an evaluation signal from the electrical signals generated when the light is coupled into the semiconductor layer, and at least one calibration unit for calibrating at least one pulse discriminator on the basis of the evaluation signal. This provides the prerequisites for a rapidly repeatable calibration of the X-ray detector taking account of the present polarization state without using X-ray radiation. At least one embodiment of the invention additionally relates to a calibration method for such an X-ray detector. | 10-20-2011 |
20130161773 | DETECTOR ELEMENT, RADIATION DETECTOR, MEDICAL DEVICE, AND METHOD FOR PRODUCING SUCH A DETECTOR ELEMENT - A detector element is disclosed, including a semiconducting converter element and a number of pixilated contacts arranged thereon. A radiation detector is also disclosed including such a detector element, along with a medical device having one or more such radiation detectors. Finally, a method for producing a detector element is disclosed, which includes forming pixelated contacts by way of a photolithographic process on the semiconducting converter element using a lithographic mask arranged on a converter element protective layer. | 06-27-2013 |
20140037066 | METHOD FOR TEMPERATURE STABILIZATION, X-RAY DETECTOR AND CT SYSTEM - A method is disclosed for the temperature stabilization of a direct-converting X-ray detector, including a detector surface having a semiconductor and being divided into a plurality of partial detector surfaces. During the irradiation of the detector surface, heat is generated in the semiconductor by electric power. Electric power generated in the semiconductor is kept constant for each partial detector surface at least during a heterogeneous and/or temporally variable irradiation of the detector surface by feeding-in power-adjusted additional radiation for each partial detector surface. A direct-converting X-ray detector is disclosed for the detection of X-rays. At least one control loop with at least one reference variable is embodied for the energy regulation of the additional radiation, which keeps the temperature in the semiconductor constant for each partial detector surface by keeping the electric power in the semiconductor constant by changing the energy of the additional radiation. A CT system is disclosed. | 02-06-2014 |
20140231944 | RADIATION DETECTOR AND MEDICAL DIAGNOSTIC SYSTEM - A radiation detector is disclosed, including a plurality of detector elements arranged adjacent to one another in a planar manner. In an embodiment, for the purpose of radiation detection, a semiconductor layer with an upper side and a lower side is present, the semiconductor layer on one of the sides including an electrode embodied so as to extend across a number of detector elements and electrodes subdivided into individual electrodes being arranged on the other side of the semiconductor layer so that by applying voltage between the electrodes of the two sides, an electrical field is generatable and each individual electrode is assigned an effective volume so as to collect charge in the semiconductor layer. In an embodiment, the individual electrodes are alternately connected to at least two different voltage potentials. Furthermore, a medical diagnostic system is disclosed, including at least one such radiation detector. | 08-21-2014 |
20150028441 | SEMICONDUCTOR ELEMENT WITH SOLDER RESIST LAYER - A semiconductor element includes a CdTe-based semiconductor material and a number of connection points of the semiconductor element to connect to electronic components. In at least one embodiment, the connection points are provided with a special solder resist layer including a mixture AB of at least two metals with different coefficients of expansion. In at least one embodiment, a radiation detector includes such a semiconductor element and optionally includes evaluation electronics for reading out a detector signal. In at least one embodiment, a medical technology device includes such a radiation detector. Furthermore, a method is disclosed for creating a semiconductor element which includes applying a solder resist layer to connection points. In at least one embodiment, the solder resist layer includes a mixture of at least two metals with different coefficients of expansion. | 01-29-2015 |
20150030120 | DIRECT-CONVERSION X-RAY DETECTOR - An of the invention relates to a direct-conversion x-ray detector for detection of x-ray radiation, including a direct converter used for detection of the x-ray radiation, at least one collimator disposed at least partly in the direction of radiation of the x-ray radiation in front of the direct converter and a least one radiation source which is disposed to the side of the direct converter and irradiates the direct converter indirectly with an additional radiation. In at least one embodiment, the a least one collimator, on a side facing towards the direct converter, includes at least one reflection layer, on which the additional radiation is reflected onto the direct converter, and includes a cooling facility through which the at least one radiation source is able to be cooled. | 01-29-2015 |
20150060677 | X-RAY DETECTOR - An X-ray detector is disclosed, in particular for a computed tomography system. In an embodiment, the X-ray detector includes a regular arrangement of measuring pixels for covering a measuring surface. A plurality of the measuring pixels of the regular arrangement are constructed as direct converting measuring pixels, and remaining ones of the measuring pixels are constructed as indirect converting measuring pixels. | 03-05-2015 |