Computerized Axial Tomography, CAT, or Computed Tomography, CT Terms +

(a radiographic technique that produces an image of a detailed cross section of bodily tissue using a narrow collimated beam of x-rays that rotates in a full arc around a patient to image the body in cross-sectional slices)

contrast agent (s) (noun), contrast agents (pl)
A contrast medium: A contrast agent is a liquid (usually iodine or gadolinium) that is injected into the body to make certain tissues show up clearly during diagnostic imaging (angiography, CT, myelogram, MRI).
contrast,medium (s) (noun), ontrast mediums; contrast media (pl)
A substance used in radiography to enhance the visibility of structures within the body: Contrast media are X-ray dyes used to provide contrast; for example, between blood vessels and other tissues.

CT scan, computerized tomography scan (s) (noun); CT scans;, computerized tomography scans (pl)
Pictures of structures within the body created by a computer that takes the data from multiple X-ray images: A CT scan turns the images into pictures on a screen, which are mainly used for diagnostic purposes.

CT stands for computerized tomography.

cyst (s) (noun), cysts (pl)
An abnormal, closed sac-like structure within a tissue that contains a liquid, gaseous, or semisolid substance: Cysts can occur anywhere in the body and can vary in size.

The outer, or capsular, portion of a cyst is termed the cyst wall.

epinephrine (s) (noun), epinephrines (pl)
A substance produced by the medulla (inside) the adrenal gland.

The name epinephrine was coined in 1898 by the American pharmacologist and physiologic chemist (biochemist) John Jacob Abel who isolated it from the adrenal gland which is located above (epi-) the kidney (Greek nephros).

Technically speaking, epinephrine is a sympathomimetic catecholamine.

It causes quickening of the heart beat, strengthens the force of the heart's contraction, opens up the airways (bronchioles) in the lungs and has numerous other effects.

The secretion of epinephrine by the adrenal is part of the fight-or-flight reaction. Adrenaline is a synonym of epinephrine and is the official name in the British Pharmacopoeia.

fetus (s) (noun), fetuses; fetus; feti; fetii (pl)
The unborn offspring from the end of the eighth week after conception: The major structures have formed in a fetus, and it is called a fetus until birth:

Up until the eighth week the developing offspring is called an embryo.

film, X-ray film (s) (noun); films; X-ray films (pl)
Photographic film that is needed to produce X-ray pictures: When Susan was being examined at the dentist's office, she had to hold a dental X-ray film with her teeth during a radiography.

Film is an abbreviation of an X-ray, a radiograph.

gallbladder (s) (noun), gallbladders (pl)
A pear-shaped organ just below the liver that stores the bile secreted by the liver: During a fatty meal, the gallbladder contracts, delivering the bile through the bile ducts into the intestines to help with digestion.

The abnormal composition of bile leads to formation of gallstones, a process known as cholelithiasis.

The gallstones cause cholecystitis, or inflammation of the gallbladder.

hive (pl) (noun)
A raised, itchy area of skin that is usually a sign of an allergic reaction: Hives can be rounded or flat-topped, but hives rise above the surrounding skin.

Hives indicate circumscribed dermal edema (local swelling of the skin).

The hives are usually well circumscribed but may be coalescent and will blanch with pressure.

infection (s) (noun), infections (pl)
The growth of a parasitic organism within the body. Usually a person with an infection has another organism called a "germ" growing in the body where it gets nourishment from the body, too.

A parasitic organism is one which lives on or in another organism and draws its nourishment from that body.

intervention (s) (noun), interventions (pl)
1. The act of intervening, interfering, or interceding with the intent of modifying a result: In medicine, an intervention is usually undertaken to help treat or to cure a condition.
2. Etymology: from Latin intervenire, "to come between".

iodine (s) (noun), iodines (pl)
An essential element in the diet used by the thyroid gland: Iodine is very important for the thyroid to produce thyroid hormones.
itching (s) (noun), itchings (pl)
An uncomfortable sensation in the skin that feels as if something is crawling on or in the skin: ,The itching makes a person want to scratch that affected area.
kidney
One of a pair of organs located in the right and left side of the abdomen which clear "poisons" from the blood, regulate acid concentration, and control the water balance in the body by excreting urine.

The kidneys are part of the urinary tract where the urine passes through connecting tubes called ureters into the bladder. The bladder stores the urine until it is released during urination.

liver
An organ in the upper abdomen that aids in the digestion of food and removes waste products and worn-out cells from the blood.

The liver is the largest solid organ in the body and weighs about three and a half pounds (1.6 kilograms).

It measures about eight inches (20 cm) horizontally (across) and 6.5 inches (17 cm) vertically (down) and is 4.5 inches (12 cm) thick.