CAT scan
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  CAT scan



CAT scan

   Computerized tomography diagnostic imaging procedure that uses a combination of x-rays and computer technology to produce cross-sectional images (often called slices), both horizontally and vertically, of the body. A CT scan shows detailed images of any part of the body, including the bones, muscles, fat, and organs. CT scans are more detailed than general x-rays.

RELATED TERMS
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Tomography
From the Greek words "to cut or section" (tomos) and "to write" (graphein), in nuclear medicine, it is a method of separating interference from the area of interest by imaging a cut section of the object.

Diagnostic
Pertaining to a diagnosis; usually refers to a characteristic or criteria which is critical for a specific diagnosis.

X-rays
Electromagnetic radiations that, because of their penetrating power, are used to record on film shadows of the varying densities within a part of the body.

Fat
A major energy source for animals and humans. Fat contains nine calories per gram.



SIMILAR TERMS
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Cat cry syndrome
A disorder caused by the loss of part of the short (p) arm from chromosome 5. Also called the cri du chat (or cri-du-chat) syndrome.

Cat eye syndrome
A constitutional chromosome abnormality (one that is present at or before birth) with multiple malformations characterized by the combination of a cat-like slit of the iris of the eye (vertical coloboma) and no anal opening (anal atresia). Frequently there are also down slanting eye slits (palpebral fissures), tissue tags or pits just in front of the ears, heart malformations and kidney anomalies.

CAT scan, helical
A helical CAT scan is a new specialized CAT scan technique that involves continuous movement of the patient through the scanner with the ability to scan faster and with higher definition of internal structures. Helical CAT scanning can permit greater visualization of blood vessels and internal tissues, such as those within the chest cavity. This form of scanner may be particularly helpful in the rapid evaluation of severe trauma injuries, such as those sustained in automobile accidents..

CAT scan, spiral
A spiral CAT scan is a new specialized CAT scan technique that involves continuous movement of the patient through the scanner with the ability to scan faster and with higher definition of internal structures. Spiral CAT scanning can permit greater visualization of blood vessels and internal tissues, such as those within the chest cavity. This form of scanner may be particularly helpful in the rapid evaluation of severe trauma injuries, such as those sustained in automobile accidents.

Cat scratch disease
A bacterial infection due to a cat scratch seen most often today in people with HIV. The disease characteristically presents with swollen lymph nodes (lymphadenitis), sore throat, fatigue, and fever, chills, sweats, vomiting, loss of appetite, and weight loss. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the site of the scratch. Then more nodules appear on and under the skin. As the number of nodules increases, patients get sicker.

Cat scratch fever
A bacterial infection due to a cat scratch seen most often today in people with HIV. The disease characteristically presents with swollen lymph nodes (lymphadenitis), sore throat, fatigue, and fever, chills, sweats, vomiting, loss of appetite, and weight loss. There is usually a little bump (a papule) which may be pus-filled (a pustule) at the site of the scratch. Then more nodules appear on and under the skin. As the number of nodules increases, patients get sicker.



PREVIOUS AND NEXT TERMS
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Cell nucleus
An organelle, found in most eukaryotic cells, which contains most of the cell's genetic material. Nuclei have two primary functions: to control chemical reactions within the cytoplasm and to store information needed for cellular division. Plural: nuclei.

Calcitonin
A hormone secreted by the thyroid gland which controls the levels of calcium and phosphorous in the blood.

Carbohydrates
A type of food, usually derived from plants; one of three nutrients that supply calories to the body; includes simple carbohydrates (sugar, fruit) and complex carbohydrates (vegetables, starches).

Cholesterol
A substance similar to fat that is found in the blood, muscles, liver, brain, and other body tissues.

Computer Tomography Scan
A diagnostic imaging procedure that uses a combination of x-rays and computer technology to produce cross-sectional images (often called slices), both horizontally and vertically, of the body. A CT scan shows detailed images of any part of the body, including the bones, muscles, fat, and organs. CT scans are more detailed than general x-rays.

CAT scan

Corticoids
Substances similar to the hormone of the adrenal glands called cortisone; corticoids are differentiated into two groups – mineralocorticoids and glucocorticoids applied both locally and systemically, mainly as anti-phlogistics, immunosuppressives, anti-asthmathics or in the treatment of an allergy.

Comedone
Commonly know as black heads or white heads. This is where a hair follicle becomes plugged with sebum. When the lipid or sebum is exposed to the environment it is oxidized an turns black (black heads). When the follicle is closed and not exposed to the environment they are cream colored (white heads).

Chemotaxis
The movement of cells in response to chemical messengers. The movement of neutrophils and macrophages into damaged tissues is brought about by signals released by damaged tissues, and bacterial products. The term applies to the movement of any organism attracted by a specific chemical, which may be a suitable nutrient.

Clindamycin
Clindamycin is a semisynthetic antibiotic and derived from lincomycin by the addition of chloride. Clindamycin is sold under brand names such as Dalacin and Cleocin.Is has often been prescribed topically to treat acne. Caution: has provoked severe colitis.

Cyproterone acetate
Cyproterone acetate is a progestin that also blocks the effect of androgens on the skin. It is very useful for the treatment of hirsutism. A rare side effect is liver problems. Cyproterone acetate is available in oral contraceptive pills (Diane® and Dianette®) and a brand name is Androcur®.

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