7. Radiography and related techniques
X-rays are used to examine the structure or internal health of an object by passing very short-wave electromagnetic radiation (X-rays or γ-rays) through it and collecting the beam's intensity modulations in the form of an image on a suitable receiver - a film in most cases, as illustrated in figure 23 . By the same token, images can be obtained using particles other than photons, enabling techniques such as neutronography, which will also be discussed in this section.
7.1 Physical basis of radiographic inspection
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Radiography and related techniques
Ultrasound
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