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ASTM E 2446 : 2015

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Standard Practice for Manufacturing Characterization of Computed Radiography Systems
Available format(s)

Hardcopy , PDF

Superseded date

08-03-2023

Language(s)

English

Published date

11-06-2015

1.1This practice describes the manufacturing characterization of computed radiography (CR) systems, consisting of a particular phosphor imaging plate (IP), scanner, software, and an image display monitor, in combination with specified metal screens for industrial radiography.

1.2The practice defines system tests to be used to characterize the systems of different suppliers and make them comparable for users.

1.3This practice is intended for use by manufacturers of CR systems or certification agencies to provide quantitative results of CR system characteristics for nondestructive testing (NDT) user or purchaser consumption. Some of these tests require specialized test phantoms to ensure consistency of results among suppliers or manufacturers. These tests are not intended for users to complete, nor are they intended for long term stability tracking and lifetime measurements. However, they may be used for this purpose, if so desired.

1.4The CR system performance is described by the basic spatial resolution, contrast, signal and noise parameters, and the equivalent penetrameter sensitivity (EPS). Some of these parameters are used to compare with DDA characterization and film characterization data (see Practice E2597 and Test Method E1815).

Note 1:For film system characterization, the signal is represented by the optical density of 2 (above fog and base) and the noise as granularity. The signal-to-noise ratio is normalized by the aperture (similar to the basic spatial resolution) of the system and is part of characterization. This normalization is given by the scanning circular aperture of 100 µm of the micro-photometer, which is defined in Test Method E1815 for film system characterization.

1.5The measurement of CR systems in this practice is restricted to a selected radiation quality to simplify the procedure. The properties of CR systems will change with radiation energy but not the ranking of CR system performance. Users of this practice may carry out the tests at different or additional radiation qualities (X-ray or gamma ray) if required.

1.6The values stated in SI are to be regarded as the standard.

1.7This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

Committee
E 07
DocumentType
Standard Practice
Pages
14
PublisherName
American Society for Testing and Materials
Status
Superseded
SupersededBy
Supersedes

ASTM E 2903 : 2018 Standard Test Method for Measurement of the Effective Focal Spot Size of Mini and Micro Focus X-ray Tubes
ASTM E 2007 : 2010 : R2016 Standard Guide for Computed Radiography
ASTM E 2445/E2445M : 2014 Standard Practice for Performance Evaluation and Long-Term Stability of Computed Radiography Systems
ASTM E 2662 : 2015 Standard Practice for Radiographic Examination of Flat Panel Composites and Sandwich Core Materials Used in Aerospace Applications
ASTM E 2973 : 2015 Standard Digital Reference Images for Inspection of Aluminum and Magnesium Die Castings
ASTM E 94/E94M : 2017 Standard Guide for Radiographic Examination Using Industrial Radiographic Film
ASTM E 2597/E2597M : 2014 Standard Practice for Manufacturing Characterization of Digital Detector Arrays
ASTM E 2033 : 2017 Standard Practice for Radiographic Examination Using Computed Radiography (Photostimulable Luminescence Method)
ASTM E 746 : 2018 Standard Practice for Determining Relative Image Quality Response of Industrial Radiographic Imaging Systems

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