A benchmark concept for simulation in radiographic testing

Journal Article · Tue Feb 18 04:00:00 EST 2014 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4865044· OSTI ID:22263773

Ewert, U.; Deresch, A.; Bellon, C.; Jaenisch, G. -R. ^[1]

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1. Federal Institute for Materials Research and Testing Unter den Eichen 87, 12205 Berlin (Germany)

The new standard ISO 17636–2:2013 “NDT of welds: Radiographic testing - Part 2: X- and gamma ray techniques with digital detectors” describes a complex procedure for film replacement by phosphor imaging plates and digital detector arrays. RT modeling software should consider these detector types, X-ray film, and the standard requirements for image quality. Practitioners expect the same visibility of image quality indicators (IQI) in the simulated radiographs as in the experimental exposures. The proposed benchmark test is based on the comparison of experimental radiographs taken at BAM with modeled ones of participants. The experimental setup and the determination of the equivalent penetrameter sensitivity (EPS) as described in the procedure of ASTM E 746 are used for quantitative evaluation of the achievable contrast sensitivity for step hole IQIs as considered in Annex B of ISO 17636–2. System classification data for Computed Radiography (CR) and film systems will be provided by BAM according to ISO 11699–1 for selected film systems and according to ASTM E 2446 for selected CR systems. The classification of films and digital detectors is based on the measurement of the dose response function, the basic spatial resolution (SR{sub b}) of the image, and the measured image noise, which depends on the detector efficiency, the quantum statistics, and the detector fixed pattern noise.

• OSTI ID: 22263773
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1581; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BENCHMARKS
CLASSIFICATION
COMPARATIVE EVALUATIONS
COMPUTERIZED TOMOGRAPHY
EFFICIENCY
FILMS
GAMMA RADIATION
IMAGES
RESPONSE FUNCTIONS
SENSITIVITY
SIMULATION
SPATIAL RESOLUTION
TESTING
X RADIATION