Digital Radiography
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Digital radiography (DR) is an advanced form of x-ray inspection which produces a digital radiographic image instantly on a computer. This technique uses x-ray sensitive plates to capture data during object examination, which is immediately transferred to a computer without the use of an intermediate cassette. The incident x-ray radiation is converted into an equivalent electric charge and then to a digital image through a detector sensor. Compared to other imaging devices, flat panel detectors, also known as digital detector arrays (DDAs) provide high quality digital images. They can have better signal-to-noise ratio and improved dynamic range, which, in turn, provides high sensitivity for radiographic applications. Flat panel detectors work on two different approaches, namely, indirect conversion and direct conversion. Indirect conversion flat panel detectors have a scintillator layer which converts x-ray photons to photons of visible light and utilise a photo diode matrix of amorphous silicon to subsequently convert the light photons into an electrical charge. This charge is proportional to the number and energy of x-ray photons interacting with the detector pixel and therefore the amount and density of material that has absorbed the x-rays. |
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No. |
Type |
Format |
Title |
Edition |
Description |
Author |
Priority |
Availability |
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1 |
S |
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2013 |
This part of ISO 1763Q specifies fundamental techniques of digital radiography with the object of enablin! satisfactory and repeatable results to be obtained economically. The techniques are based on generall recognized practice and fundamental theory of the subject. |
ISO |
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Upon Request |
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2 |
S |
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E1936-15 - Evaluating the Performance of radiographic Digitization Systems.pdf |
2015 |
This reference radiograph covers a series of test targets suitable for evaluating, quantifying, and documenting perfor-mance parameters of the radiographic digitization process or the electronic image reconstruction process, or both. This reference radiograph can be used for visual and electronic analysis of digitization systems. |
ASTM |
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Upon Request |
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3 |
S |
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E2339-11 - Digital Imaging and Communication in Nondestructive Evaluation.pdf |
2011 |
This practice facilitates the interoperability of NDE imaging and data acquisition equipment by specifying the image data in commonly accepted terms. |
ASTM |
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Upon Request |
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4 |
GL |
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2015 |
The German Society for Non-Destructive Testing NDT, previously, had initiated a training course on digital radioscopy (RT-S) in 1994 (level 1) followed by a level 2 training course in 1996 (— 520 certificates altogether, 2012). |
IAEA |
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Upon Requist |
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5 |
Paper |
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2017 |
X-ray inspection is a widely adapted technology for quality control of industrial products in many sectors. In particular, safety relevant parts in the aerospace, automotive, and oil and gas sectors are subject to exhaustive tests. A broad and sometimes confusing palette off international, national, and company specific quality standards and requirements has to be closely followed to pass the demanding audits. Additional uncertainty is evolving from the constant technology shift to digital radiography. The quality and variety of digital detector arrays (DDAs) is increasing at a faster pace than ever, allowing their usage in more and more applications. |
Lennart Schulenberg |
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Upon Requist |
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6 |
S |
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2013 |
This part of ISO 17636 specifies fundamental techniques of digital radiography with the object of enabling satisfactory and repeatable results to be obtained economically. The techniques are based on generally recognized practice and fundamental theory of the subject. |
ISO |
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Upon Requist |
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7 |
Paper |
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2011 |
Digital radiology (DR) using digital detector arrays (DDAs) has been successfully utilized in the medical industry for more than 15 years. The implementation of medical DR products in NDT had been restricted mainly due to the high image unsharpness. Most medical DR detectors require a low radiation dose for their exposure, and are therefore attractive for NDT applications from an economical point of view. In contrast to most medical diagnostic requirements, the NDT of welds, castings, and even electronics requires high definition systems, or the use of magnification techniques, to enable the visualization of small cracks and flaws. Since radiation dose is a limiting value for medical applications, some of the following new strategies for NDT were never addressed in medicine. |
Uwe Ewert, Klaus Bavendick, Jason Robbins, Uwe Zscherpel, Cliff Bueno, Trey Gordon, and Debasish Mishra |
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Upon Requist |
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8 |
Paper |
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NA |
Shipyards face the necessity of conducting daily tests in X-ray during the construction of the hull. This requirement however presents special challenges: The size of the hull, it's being made mainly of steel parts and the requirement of conducting mas-sive testing. This article examines the problems the MDT provider has to face when conducting tests in shipyards and how they may be resolved with a special portable digital radiography system. |
Ofra Kleinberg, Eli Dayan, Lior Pick, and Ron Pincu |
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Upon Requist |
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9 |
Paper |
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Technical Highlights for NDT Digital Radiography (X-Ray) Inspection.pdf |
2011 |
Digital Radiography (DR) is finally taking its rightful place in the arsenal of NDT technologies. With film X-ray dyeing out as film manufacturers stop film production, NDT technicians seek new solutions for X-ray NDT. DR is the leading, most innovative top technology for X-ray inspection available today. With its high quality imaging, NDT results and analysis quality is increased. Amorphous Silicon (a-Si) flat panels are up to 100 times more sensitive than film and allow for great images with reduced exposures or energies. The high signal to noise ratio enables improved probability of detection (POD), and combined with fast and easy set up on site, the inspection time is shortened significantly, reducing costs and plant shut down. The software provided with DR enables image enhancement that makes even the tiniest detail visible to the human eye. In this article we will review the properties of hardware and software required to maximise the quality potential of results that can be achieved with this advanced technology. |
Lior Pick, Ofra Kleinberg |
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Upon Requist |
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10 |
Paper |
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2009 |
This paper provides an introduction to the Digital radiography |
Lior Pick, Ofra Kleinberg |
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Upon Requist |
