ISO 16371-1:2011
Non-destructive testing — Industrial computed radiography with storage phosphor imaging plates — Part 1: Classification of systems
Non-destructive testing — Industrial computed radiography with storage phosphor imaging plates — Part 1: Classification of systems
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 25
- Дата публикации:
- 13 сентября 2011 г.
- Издание:
- ISO IS 16371 edition 1 version 1
- ICS:
- 19.100
ISO 16371-1:2011 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. ISO 16371-1:2011 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. ISO 16371-1:2011 relates to the requirements of film radiography defined in ISO 11699-1. ISO 16371-1:2011 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 ISO 16371-1:2011. 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 ISO 16371-1:2011 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.
Abstract
Overview
ISO 16371-1:2011 - Non-destructive testing - Industrial computed radiography with storage phosphor imaging plates - Part 1: Classification of systems - defines how to measure and classify computed radiography (CR) systems made of storage phosphor imaging plates (IP) and scanners/readers. The standard specifies fundamental performance parameters and test methods (manufacturer and user levels) so that CR image quality - as influenced by the scanner–IP system - can be assessed reproducibly and economically. It is aimed at enabling comparable classification of CR systems and ensuring compatibility with requirements in related testing standards.
Key topics and technical requirements
- Scope and purpose: Defines CR system components (IP + scanner + software) and establishes classification by Signal-to-Noise Ratio (SNR) ranges and basic spatial resolution for specified exposure ranges.
- Quality indicators: Detailed list of CR quality indicators for both user and manufacturer tests, including:
- Contrast sensitivity targets
- Duplex wire IQI for un-sharpness and resolution
- Converging line-pair targets for spatial resolution
- Linearity rulers and T-targets
- Shading, scanner slipping, central beam alignment (BAM-snail), and other artefact indicators
- Quantitative measurements: Procedures to measure normalized SNR, minimum read-out intensity, and un-sharpness (MTF method and duplex wire method). ISO 16371-1 also defines how to determine ISO speed for CR systems.
- Test levels:
- Manufacturer tests - more complex, require special tools and deliver exact system parameters for classification.
- User tests - simpler, fast quality checks for long-term stability and routine QA; includes recommended individual test targets and the CR Phantom (Annex B) that aggregates many checks.
- Other checks: Geometric distortion, laser beam function, blooming/flare, erasure effectiveness, IP artefacts and scanner transport issues.
- Personnel: Assumes qualified personnel; certification per ISO 9712 (or equivalent) is recommended.
Practical applications - who uses this standard
- CR system manufacturers - to characterise and classify product performance and report ISO speed/SNR/MTF.
- NDT/industrial radiography labs and inspectors - for acceptance testing, periodic QA, troubleshooting and long-term stability monitoring of CR equipment.
- Procurement and quality managers - to compare systems from different suppliers using standardised metrics.
- Maintenance and service engineers - to verify repairs, upgrades or IP changes using manufacturer and user tests.
Related standards
- ISO 16371-2 (planned): principles for testing metallic materials using X-rays and gamma rays
- ISO 11699-1: film radiography classification (reference for film requirements)
- ISO 19232-5: duplex wire IQI and unsharpness determination
- ISO 9712: personnel qualification recommendations
Keywords: ISO 16371-1, computed radiography, CR systems, storage phosphor imaging plates, imaging plate, scanner, CR Phantom, SNR, ISO speed, MTF, duplex wire IQI, non-destructive testing, industrial radiography.
Технические детали
- Технический комитет
- ISO/TC 135/SC 5 - Radiographic testing
- SKU
- ISO 16371-1:2011
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