Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Disciplines (hierarchy name)
4. disciplines (concept)
5. [science and related disciplines]
6. science (modern discipline)
7. health sciences
8. medicine (discipline)

Additional parents:

1. top of the aat hierarchies
2. Activities Facet
3. Disciplines
4. disciplines
5. science and related disciplines
6. science
7. natural sciences
8. physical sciences
9. physics

Anotations

Scope note:

The science concerned with the use of radiation, such as X-rays and radioactive materials in the diagnosis and treatment of disease. For the application of techniques producing radiographic images, use "radiography."