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Digital Radiography: Now & in The Future

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Digital computerized radiography (DCR) combines conventional radiography with digitized computer imaging. Three basic elements of radiography include a radiation source, the object being evaluated, and a sensing material (Fig. 1). The object in the diagram is a plate of uniform thickness that contains an internal flaw with absorption characteristics different from those of the surrounding material. Radiation from the source is absorbed by the plate as the radiation passes through it; the flaw and surrounding material absorb different amounts of radiation. Thus, the intensity of radiation that impinges on the sensing material in the area beneath the flaw is different from the amount that impinges on adjacent areas. This produces an image, or shadow, of the flaw on the sensing material.

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THE FUTURE OF NDT TESTING: Radiography Meets Robotics

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If you've been to your dentist for a checkup lately and had your mouth X-rayed, you may have noticed some procedural changes that indicate technological advances are migrating from industrial applications of nondestructive testing (NDT).

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Digital Pipeline Radiography Speeds Detection Of Corrosion And Other Anomalies

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Recent developments in solid-state radiographic pipeline inspection equipment, primarily durable, mobile computers and solid-state image capturing devices, are raising the technique's profile as a useful, capable way to find and assess corrosion. This article discusses how the integration of computers and solid-state imaging systems have increased the power of radiography in inspecting in-service hydrocarbon pipelines.

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Art Conservation with Computed Radiography

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For almost half a century, advanced radiography techniques have lent a hand in providing critical safety inspections to a vast array of industry applications. While advanced NDT methods are most commonly utilized in mission-critical operations such as aerospace, infrastructure, automotive, manufacturing and energy; radiographic testing methods have also long been applied in the fields of art and archaeology. The Art Conservation Department at Buffalo State College, in Buffalo, NY, provides its students with cutting-edge Carestream technology to assist them in the conservation of important historical art pieces in order to prepare them for the ongoing paradigm shift to digital technologies in the art conservation profession.

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Digital Radiography Replaces Film

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The digital revolution that occurred in both amateur and professional photography was the direct result of increased recognition that—for most applications—digital works better. Digital radiography (DR) experienced similar rapid growth in clinical use and has spilled over into the nondestructive testing (NDT) arena. While DR technology has been in use for some time, recognition of its merits is somewhat lacking among the NDT film radiography community. There are several types of DR, but the two most commonly used in NDT are computed radiography (CR) and digital detector array radiography (DDA).
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