CT Scan (CAT Scan, Computerized Axial Tomography) Glossary of Terms

The following are health and medical definitions of terms that appear in the CT Scan (CAT Scan, Computerized Axial Tomography) article.

Abdomen: The belly, that part of the body that contains all of the structures between the...

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Abdominal: Relating to the abdomen, the belly, that part of the body that contains all of ...

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Abnormal: Outside the expected norm, or uncharacteristic of a particular patient.

Allergic reaction: The hypersensitive response of the immune system of an allergic indiv...

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Arthritis: Inflammation of a joint. When joints are inflamed they can develop stiffness, w...

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Asthma: A common lung disorder in which inflammation causes the bronchi to swell and narro...

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Autopsy: A postmortem examination. Also known as necropsy.

Barium: 1. A metallic element belonging to the alkaline earths with an atomic numbe...

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Bowel: The small and large intestine.

Brain: The portion of the central nervous system that is located within the skull. It func...

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Breathing: The process of respiration, during which air is inhaled into the lungs through ...

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Cancer: An abnormal growth of cells which tend to proliferate in an uncontrolled way and, ...

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CAT scan: Computerized axial tomography scan. CAT scanning is a painless X-ray test in whi...

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Chest: The area of the body located between the neck and the abdomen. The chest contains t...

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Chest X-ray: A type of X-ray commonly used to detect abnormalities in the lungs. A chest X...

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Claustrophobia: An abnormal and persistent fear of closed spaces, of being closed in or be...

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Computed tomography: An x-ray procedure that uses the help of a computer to produce a deta...

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Computerized tomography: Pictures of structures within the body created by a computer that...

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Contrast: Short for "contrast media." Contrast media are X-ray dyes used to provide contra...

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CT scan: Computerized tomography scan. Pictures of structures within the body created by a...

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Diagnosis: 1 The nature of a disease; the identification of an illness. 2 A ...

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Disc: Shortened terminology for an intervertebral disc, a disk-shaped piece of specialized...

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Dizziness: Painless head discomfort with many possible causes including disturbances of ...

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Ear: The hearing organ. There are three sections of the ear, according to the anatomy tex...

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Emphysema: 1) A lung condition featuring an abnormal accumulation of air in the lung's ma...

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Fracture: A break in bone or cartilage. Although usually a result of trauma, a fracture ca...

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Gastrointestinal: Adjective referring collectively to the stomach and small and large inte...

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Gastrointestinal tract: The stomach and intestines. Abbreviated GI tract.

Godfrey Hounsfield: See: Hounsfield, Godfrey.

Heart: The muscle that pumps blood received from veins into arteries throughout the body. ...

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Heart disease: Any disorder that affects the heart. Sometimes the term "heart disease" is ...

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Herniated disc: Rupturing of the tissue that separates the vertebral bones of the spinal c...

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Hospital gown: A short collarless gown that ties in the back, worn by patients being exami...

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Hounsfield: 1. Godfrey Hounsfield, a key contributor to the creation of the CAT sca...

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Itching: An uncomfortable sensation in the skin that feels as if something is crawling on ...

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Large bowel: Another name for the large intestine.

Leg: In popular usage, the part of the body from the top of the thigh down to the foot, an...

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Liver: The largest solid organ in the body, situated in the upper part of the abdomen on t...

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Lymph: The almost colorless fluid that travels through the lymphatic system, carrying cell...

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Middle ear: A part of the ear that consists of the eardrum (tympanic membrane) and, beyond...

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MRI: Magnetic resonance imaging.

Neck: The part of the body joining the head to the shoulders. Also, any narrow or constric...

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Obstruction: Blockage of a passageway. See, for example: Airway obstruction; Intestinal o...

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Outpatient: A patient who is not hospitalized, but instead comes to a physician?s office, ...

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Pain: An unpleasant sensation that can range from mild, localized discomfort to agony. Pa...

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Pancreas: A spongy, tube-shaped organ that is about 6 inches long and is located in the ba...

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Pelvic: Having to do with the pelvis, the lower part of the abdomen, located between the h...

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Pelvis: The lower part of the abdomen, located between the hip bones. Structures in the fe...

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Pneumonia: Inflammation of one or both lungs, with dense areas of lung inflammation. Pneum...

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Radiation: 1. Rays of energy. Gamma rays and X-rays are two of the types of energy ...

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Radiograph: In medicine, an X-ray or a film produced through X-ray.

Radiologist: A physician specialized in radiology, the branch of medicine that uses ionizi...

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Scan: As a noun, the data or image obtained from the examination of organs or regions of...

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Sinus: 1. An air-filled cavity in a dense portion of a skull bone. The sinuses decr...

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Skull: The skull is a collection of bones which encase the brain and give form to the hea...

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Spinal stenosis: Narrowing of the spinal canal. Spinal stenosis is most commonly caused by...

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Spine: 1) The column of bone known as the vertebral column, which surrounds and protects ...

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Spleen: An organ that is located in the upper-left part of the abdomen, not far from the s...

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Stenosis: A narrowing. For example, aortic stenosis is a narrowing of the aortic valve in ...

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Stomach: The digestive organ that is located in the upper abdomen, under the ribs. The upp...

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Stroke: The sudden death of brain cells due to lack of oxygen, caused by blockage of blood...

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Surgery: The branch of medicine that employs operations in the treatment of disease or inj...

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Tomography: The process for generating a tomogram, a two-dimensional image of a slice or s...

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Ultrasound: High-frequency sound waves. Ultra-sound waves can be bounced off tissues by us...

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Vein: A blood vessel that carries blood that is low in oxygen content from the body back t...

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Vessel: A tube in the body that carries fluids. Examples of vessels are blood vessels and ...

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X-ray: High-energy radiation with waves shorter than those of visible light. X-ray is used...

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