What is Radiography Testing?
Radiography Testing (RT) is a non-destructive testing (NDT) method which uses either x-rays or gamma rays to examine the internal structure of manufactured components identifying any flaws or defects.
In Radiography Testing the test-part is placed between the radiation source and film (or detector). The material density and thickness differences of the test-part will attenuate (i.e. reduce) the penetrating radiation through interaction processes involving scattering and/or absorption.
The differences in absorption are then recorded on film(s) or through an electronic means. In industrial radiography there are several imaging methods available, techniques to display the final image, i.e. Film Radiography, Real Time Radiography (RTR), Computed Tomography (CT), Digital Radiography (DR), and Computed Radiography (CR).
How Does Radiography Testing Work?
Radiography Testing involves projecting radiation through the material being inspected and capturing the resulting image on a detector. The process includes the following steps:
- Analysis: The captured image is analyzed to identify any anomalies or defects within the object.
- Setup: The object to be inspected is positioned between a radiation source and a detection medium (such as a film or digital detector).
- Radiation Exposure: X-rays or gamma rays are directed toward the object. The radiation passes through the material and interacts differently depending on the material’s density and thickness.
- Image Capture: The varying levels of radiation that pass through the object creates an image on the detection medium. Denser areas block more radiation and appear darker, while less dense areas appear lighter.
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