M00001756
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ISO 16371-1 1st Edition, October 1, 2011 Non-destructive testing — Industrial computed radiography with storage phosphor imaging plates — Part 1: Classification of systems
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Availability date: 07/13/2021
Description / Abstract:
This part of ISO 16371 specifies fundamental parameters of
computed radiography systems with the aim of enabling satisfactory
and repeatable results to be obtained economically. The techniques
are based both on fundamental theory and test measurements. This
part of ISO 16371 specifies the performance of computed radiography
(CR) systems and the measurement of the corresponding parameters
for the system scanner and storage phosphor imaging plate (IP). It
describes the classification of these systems in combination with
specified metal screens for industrial radiography. It is intended
to ensure that the quality of images - as far as this is influenced
by the scanner-IP system - is in conformity with the requirements
of ISO 16371-2. This part of ISO 16371 relates to the requirements
of film radiography defined in ISO 11699-1.
This part of ISO 16371 defines system tests at different levels.
More complicated tests are described, which allow the determination
of exact system parameters. They can be used to classify the
systems of different suppliers and make them comparable for users.
These tests are specified as manufacturer tests. Some of them
require special tools, which are usually not available in user
laboratories. Therefore, simpler user tests are also described,
which are designed for a fast test of the quality of CR systems and
long term stability.
There are several factors affecting the quality of a CR image
including geometrical un-sharpness, signal/noise ratio, scatter and
contrast sensitivity. There are several additional factors (e.g.
scanning parameters), which affect the accurate reading of images
on exposed IPs using an optical scanner.
The quality factors can be determined most accurately by the
manufacturer tests as described in this part of ISO 16371.
Individual test targets, which are recommended for practical user
tests, are described for quality assurance. These tests can be
carried out either separately or by the use of the CR Phantom
(Annex B). This CR Phantom incorporates many of the basic quality
assessment methods and those associated with the correct
functioning of a CR system, including the scanner, for reading
exposed plates and in correctly erasing IPs for future use of each
plate.
The CR System classes in this part of ISO 16371 do not refer to
any particular manufacturer's Imaging Plates. A CR system class
results from the use of a particular imaging plate together with
the exposure conditions – particularly total exposure – the scanner
type and the scanning parameters.