Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [image-making processes and techniques]
6. [photography and photographic processes and techniques]
7. photographic techniques
8. picture-taking techniques
9. [picture-taking techniques by radiation type]
10. radiography

Anotations

Scope note:

Process that records the location and distribution in an object of radioactive substances, or those made radioactive in order to be detected, when radiation from these substances act on a photographic emulsion placed in close contact with the object. When used on a painting, identifies areas of pigments through elemental half lives.