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Ewald Roessl

Ewald Roessl, Ellerau DE

Patent application numberDescriptionPublished
20100104161PROJECTION SYSTEM FOR PRODUCING ATTENUATION COMPONENTS - The invention relates to a projection system for producing attenuation components of projection data of a region of interest. The projection system comprises a projection data providing unit (04-29-2010
20100232669DYNAMIC OPTIMIZATION OF THE SIGNAL-TO-NOISE RATIO OF DUAL-ENERGY ATTENUATION DATA FOR RECONSTRUCTING IMAGES - It is described a method for dynamically optimizing the signal-to-noise ratio of attenuation data related to two different X-ray energies for reconstructing an image of an object under examination. The method comprises (a) estimating the thickness and the material composition of the object at a plurality of different projection angles, (b) for each of the various projection angles calculating for a variety of combinations of different first and second X-ray energies a corresponding common signal-to-noise ratio, (c) for each of the various projection angles choosing the first and the second X-ray energy causing the maximum corresponding common signal-to-noise ratio, and (d) for each of the various projection angles acquiring X-ray attenuation data of the object whereby the two X-ray energies are the X-ray energies causing a maximum signal-to-noise ratio assigned to the respective projection angle.09-16-2010
20100270472DIGITAL PULSE PROCESSING FOR MULTI-SPECTRAL PHOTON COUNTING READOUT CIRCUITS - An apparatus includes a local minimum identifier (10-28-2010
20110012014SPECTRAL DETECTOR CALIBRATION - A method includes detecting radiation that traverses a material having a known spectral characteristic with a radiation sensitive detector pixel that outputs a signal indicative of the detected radiation and determining a mapping between the output signal and the spectral characteristic. The method further includes determining an energy of a photon detected by the radiation sensitive detector pixel based on a corresponding output of the radiation sensitive detector pixel and the mapping.01-20-2011
20110096892SPECTRAL CT - An imaging system includes a radiation source (04-28-2011
20110096905K-EDGE IMAGING - An imaging system including a radiation source (04-28-2011

Ewald Roessl, Hamburg DE

Patent application numberDescriptionPublished
20080279328Systems and Methods Using X-Ray Tube Spectra For Computed Tomography Applications - Computed tomography (CT) systems are provided that utilize x-ray tube spectra in connection with the generation and/or interpretation of CT data. The disclosed systems and methods use x-ray tube spectra associated with CT systems to enhance contrast and/or image quality, e.g., by making use of energy selective detection techniques. The x-ray spectra may be determined in a variety of ways, e.g., incorporation of a spectral x-ray tube model into the CT system, using the output of Monte-Carlo simulations, and/or processing measured experimental spectral tube data for the CT system. The x-ray tube spectra is generally generated by and/or stored in a computer system associated with the CT system and may be used in support of an energy selective detective method and/or generation of spectral CT images.11-13-2008
20110019794ELECTRICAL ISOLATION OF X-RAY SEMICONDUCTOR IMAGER PIXELS - To mitigate the influence of charge sharing occurring in semiconductor detectors, an improved semiconductor detector (01-27-2011
20110036989COUNTING DETECTOR - A pulse shaper (02-17-2011

Ewald Roessl, Eindhoven NL

Patent application numberDescriptionPublished
20100187429RADIATION DETECTOR WITH MULTIPLE ELECTRODES ON A SENSITIVE LAYER - The invention relates to a radiation detector (07-29-2010