TY - JOUR A1 - Ewert, Uwe A1 - Zscherpel, Uwe T1 - New detectors and perspectives in industrial radiography KW - Radiographie KW - Detectors KW - ZfP KW - Corrosion PY - 2005 VL - 12 IS - 1 SP - 59 EP - 71 PB - National Association for Applications of Radioisotopes and Radiation in Industry CY - Mumbai AN - OPUS4-7229 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ewert, Uwe A1 - Zscherpel, Uwe T1 - Najnowsze trendy w cyfrowej radiografii przemystowej / Neue Trends in der digitalen Radiographie in der Industrie KW - Radiographie KW - Detektoren KW - ZfP KW - Korrosion PY - 2005 SN - 0209-1763 SN - 0137-3684 IS - 1 SP - 9 EP - 16 CY - Warszawa AN - OPUS4-7230 LA - pol AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ewert, Uwe A1 - Zscherpel, Uwe A1 - Bavendiek, K. T1 - Digitale Radiologie in der ZfP KW - Industrielle digitale Radiologie KW - ZfP KW - Filmersatz KW - Flachdetektor KW - Bildqualität KW - Signal/Rausch-Verhältnis KW - Kontrastempfindlichkeit PY - 2005 SN - 1616-069X SN - 0948-5112 VL - 97 SP - 41 EP - 47 PB - Deutsche Gesellschaft für Zerstörungsfreie Prüfung CY - Berlin AN - OPUS4-11861 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Ewert, Uwe A1 - Zscherpel, Uwe A1 - Bavendiek, K. T1 - Digitale Radiologie in der ZfP T2 - DGZfP Jahrestagung CY - Rostock, Deutschland DA - 2005-05-02 KW - Industrielle digitale Radiologie KW - ZfP KW - Filmersatz KW - Flachdetektor KW - Bildqualität KW - Signal/Rausch-Verhältnis KW - Kontrastempfindlichkeit PY - 2005 SN - 3-931381-64-1 N1 - Serientitel: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. – Series title: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. IS - 94-CD SP - 1(?) EP - 10(?) PB - DGZfP CY - Berlin AN - OPUS4-11862 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zscherpel, Uwe A1 - Ewert, Uwe A1 - Infanzon, S. A1 - Rastkhan, N. A1 - Vaidya, P. R. A1 - Einav, I. A1 - Ekinci, S. T1 - Radiographic Evaluation of Corrosion and Deposits in Pipelines - Results of an IAEA Co-ordinated Research Programme T2 - 9th European Conference on NDT CY - Berlin, Germany DA - 2006-09-25 KW - ZfP KW - Radiographie KW - Korrosion KW - Deposit KW - Rohrleitungen KW - IAEA CRP KW - Tangentielle Projektionstechnik KW - Doppelwandtechnik KW - Anwendungsgrenze PY - 2006 SN - 3-931381-86-2 SP - 1(?) EP - 14(?) PB - European Federation for Non-Destructive Testing CY - Berlin AN - OPUS4-13873 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Gollwitzer, Christian A1 - Bellon, Carsten A1 - Deresch, Andreas A1 - Ewert, Uwe A1 - Jaenisch, Gerd-Rüdiger A1 - Zscherpel, Uwe A1 - Mistral, Q. ED - Thompson, D. O. ED - Chimenti, D. E. T1 - Simulation supported POD for RT test case - concept and modeling N2 - Within the framework of the European project PICASSO, the radiographic simulator aRTist (analytical Radiographic Testing inspection simulation tool) developed by BAM has been extended for reliability assessment of film and digital radiography. NDT of safety relevant components of aerospace industry requires the proof of probability of detection (POD) of the inspection. Modeling tools can reduce the expense of such extended, time consuming NDT trials, if the result of simulation fits to the experiment. Our analytic simulation tool consists of three modules for the description of the radiation source, the interaction of radiation with test pieces and flaws, and the detection process with special focus on film and digital industrial radiography. It features high processing speed with near–interactive frame rates and a high level of realism. A concept has been developed as well as a software extension for reliability investigations, completed by a user interface for planning automatic simulations with varying parameters and defects. Furthermore, an automatic image analysis procedure is included to evaluate the defect visibility. The radiographic modeling from 3D CAD of aero engine components and quality test samples are compared as a precondition for real trials. This enables the evaluation and optimization of film replacement for application of modern digital equipment for economical NDT and defined POD. T2 - 38th Annual Review of Progress in Quantitative Nondestructive Evaluation CY - Burlington, VT, USA DA - 2011-07-17 KW - X-ray imaging KW - Probability of detection KW - Simulation KW - ZfP KW - Radiographie KW - POD PY - 2012 SN - 978-0-7354-1013-8 U6 - https://doi.org/10.1063/1.4716283 SN - 0743-0760 SN - 0094-243X N1 - Serientitel: AIP conference proceedings – Series title: AIP conference proceedings VL - 31 IS - 1430 SP - 605 EP - 612 PB - American Institute of Physics CY - Melville, NY AN - OPUS4-26696 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Zscherpel, Uwe A1 - Ewert, Uwe A1 - Jechow, Mirko ED - Thompson, D. O. ED - Chimenti, D. E. T1 - Concepts for evaluation of image quality in digital radiology N2 - Concepts for digital image evaluation are presented for Computed Radiography (CR) and Digital Detector Arrays (DDAs) used for weld inspection. The precise DDA calibration yields an extra ordinary increase of contrast sensitivity up to 10 times in relation to film radiography. Restrictions in spatial resolution caused by pixel size of the DDA are compensated by increased contrast sensitivity. First CR standards were published in 2005 to support the application of phosphor imaging plates in lieu of X-ray film, but they need already a revision based on experiences reported by many users. One of the key concepts is the usage of signal-to-noise (SNR) measurements as equivalent to the optical density of film and film system class. The contrast sensitivity, measured by IQI visibility, depends on three essential parameters: The basic spatial resolution (SRb) of the radiographic image, the achieved signal-to-noise ratio (SNR) and the specific contrast (µeff - effective attenuation coefficient). Knowing these 3 parameters for the given exposure condition, inspected material and monitor viewing condition permits the calculation of the just visible IQI element. Furthermore, this enables the optimization of exposure conditions. The new ISO/FDIS 17636-2 describes the practice for digital radiography with CR and DDAs. It considers the first time compensation principles, derived from the three essential parameters. The consequences are described. T2 - 38th Annual Review of Progress in Quantitative Nondestructive Evaluation CY - Burlington, VT, USA DA - 2011-07-17 KW - Image resolution KW - Inspection KW - Production engineering computing KW - Radiography KW - Welding KW - X-ray imaging KW - ZfP KW - Radiographie KW - Bildqualität KW - Filmersatz KW - Digitale Detektoren PY - 2012 SN - 978-0-7354-1013-8 U6 - https://doi.org/10.1063/1.4716281 SN - 0743-0760 SN - 0094-243X N1 - Serientitel: AIP conference proceedings – Series title: AIP conference proceedings IS - 1430 SP - 589 EP - 596 PB - American Institute of Physics CY - Melville, NY AN - OPUS4-26697 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - LaCivita, K. A1 - Ewert, Uwe T1 - ÊPS-approach -Equivalent penetrameter sensitivity as applied to computed radiography KW - ZfP KW - Radiographie KW - Bildqualität KW - Speicherfolien PY - 2012 SN - 0025-5327 VL - 70 IS - 8 SP - 925 EP - 930 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-26698 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Ewert, Uwe A1 - Zscherpel, Uwe A1 - Heyne, Klara A1 - Jechow, Mirko A1 - Bavendiek, K. T1 - Image quality in digital industrial radiography KW - ZfP KW - Radiographie KW - Bildqualität KW - Digitale Detektoren PY - 2012 SN - 0025-5327 VL - 70 IS - 8 SP - 955 EP - 964 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-26699 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Bavendiek, K. A1 - Heike, U. A1 - Kosanetzky, J.M. A1 - Ewert, Uwe A1 - Zscherpel, Uwe T1 - Best energy selection for different applications with digital detector arrays from 20 to 600 keV KW - ZfP KW - Radiographie KW - Bildqualität KW - Digitale Detektoren PY - 2012 SN - 0025-5327 VL - 70 IS - 8 SP - 965 EP - 974 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-26700 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -