Delayed health effects are consequences of radiation that appear long after the original exposure.

Another term for detector, by analogy to broadcast radio receivers. Other terms used for devices of this type include modulators, phase sensitive detector and mixers.

A densitometer (also called absorptiometer) is used to measure the density of a film by the amount of light which shines through; or tissue density (e.g., bone, lung) by the amount of radiation transmission. The logarithm of the reciprocal of the transmittance is called the absorbance or density.

Densitometry is a method to image the density of for example, the bones to measure the mineral content or lung tissue to quantify emphysema.
Densitometry is also used to control the optical density of x-ray films by shining light on the film and measuring the transmission with a densitometer.

See also Bone Densitometry and Osteo CT.

A depletion test is a rarely accomplished study, used to detect deficiency in iodine organification.