TY - JOUR A1 - LaCivita, K. A1 - Ewert, Uwe T1 - ÊPS-approach -Equivalent penetrameter sensitivity as applied to computed radiography JF - Materials evaluation 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 - 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 T2 - Review of progress in quantitative nondestructive evaluation, volume 31 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 DO - 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 - JOUR A1 - Fry, D. A1 - Ewert, Uwe A1 - Gollwitzer, Christian A1 - Neuser, E. A1 - Selling, J. T1 - Measuring microfocal spots using digital radiography JF - Materials evaluation KW - ZfP KW - Radiographie KW - Bildqualität KW - Röntgen-Röhren KW - Brennfleckmessung PY - 2012 SN - 0025-5327 VL - 70 IS - 8 SP - 981 EP - 990 PB - Society for Nondestructive Testing CY - Columbus, Ohio AN - OPUS4-26701 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 JF - Materials evaluation 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 - 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 T2 - Review of progress in quantitative nondestructive evaluation, volume 31 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 DO - 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 - 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 JF - Materials evaluation 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 -