ASTM-E2446 2010

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E2446-05(2010) Standard Practice for Classification of Computed Radiology Systems

Published By	Publication Date	Number of Pages
ASTM	2010	10

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Category: ASTM

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Description

ASTM E2446-05-Reapproved2010

Historical Standard: Standard Practice for Classification of Computed Radiology Systems

ASTM E2446

Scope

1.1 This practice describes the evaluation and classification of a computed radiography (CR) system, a particular phosphor imaging plate (IP), system scanner and software, in combination with specified metal screens for industrial radiography. It is intended to ensure that the evaluation of image quality, as far as this is influenced by the scanner/IP system, meets the needs of users.

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

1.3 The CR system performance is described by signal and noise parameters. For film systems, the signal is represented by gradient and the noise by granularity. The signal-to-noise ratio is normalized by the basic spatial resolution of the system and is part of classification. The normalization is given by the scanning aperture of 100 µm diameter for the micro-photometer, which is defined in Test Method E1815 for film system classification. This practice describes how the parameters shall be measured for CR systems.

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

1.5 This 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.

Keywords

basic spatial resolution.; classification; computed radiology; CR; film system classification; normalized SNR; photo-stimulated luminescence; PSL; Image quality; Computed radiology systems; Industrial radiographic film processing/testing; Phosphor imaging plate

ICS Code

ICS Number Code 19.100 (Non-destructive testing)

DOI: 10.1520/E2446-05R10

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Significance and Use Apparatus TABLE 1 FIG. 1
3	Procedure for quantitative measurement of image quality parameters FIG. 2
5	Interpretation of Results and Classification FIG. 3
6	Precision and Bias Keywords A1. Example for IIPx measurement A1.1 A1.2 A1.3 TABLE 2
7	A1.4 TABLE A1.1
8	FIG. A1.1
9	FIG. A1.2