Gadolinium

An element used in contrast media for magnetic resonance imaging. A metal element that is used in magnetic resonance imaging (MRI) and other imaging methods. It is a contrast agent, which helps show abnormal tissue in the body during imaging with a special machine....

Gantry

A frame housing the x-ray tube, collimators, and detectors in a CT machine, with a large opening into which the patient is inserted. Part of a CT scanning machine – During a CT scan, the patient will be asked to lie on a narrow table (gantry) that slides into the...

Gastrointestinal (GI)

Relating to the stomach and intestines. The gastrointestinal system consists of the gastrointestinal tract, a tube extending from the mouth to the anus; its purpose is to break down food, prepare it for absorption and eliminate waste.

Genetic Engineering

A variety of techniques that molecular biologists use to manipulate DNA molecules to study the expression of a gene. A laboratory technique sometimes used to identify a defective gene in an unborn child which may cause a particular disease.