A spectrum is also a graphic representation of the range over which a quantity extends.

Spin is the angular momentum intrinsic to a body. Spin is an intrinsic property of every elementary particles related to angular momentum.

A collection of slices with the same orientation. Multi-stack acquisitions are possible when the stack parameter is greater than one, for example in lumbar spine CT exams with individual angulation (oblique) for every disc.

(SFDA) The State Food and Drug Administration of the People's Republic of China was founded in November 2003 and is directly under the State Council. The State Food and Drug Administration is in charge of comprehensive supervision on the safety management of food, health food and cosmetics and is the competent authority of drug regulation. For drug or medical device registration please see the SFDA's Regulatory Guide.
The agency is China's equivalent of the US Food and Drug Administration.

Stray radiation is the sum of leakage radiation and scattered radiation.