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Med. Term. Review14
Radiography Terms
| Question | Answer |
|---|---|
| Rem (roentgen-equivalent man) | radiation exposure is measured by them |
| dosimetry | process of measuring the amount of radiation exposure, as detected by a film badge (worn by people working in radiology department) and measured by a dosimeter. |
| lead apron | used to shield parts of the body that do not need to be x-rayed. Lead is extremely dense and x-rays can not pass through it. Also worn as protection by radiologist. |
| scout film | preliminary x-ray taken to provide a view of an area before radiopaque contrast dye is administered. |
| x-ray cassette and buckey | cassette - case that holds the x-ray film. Buckey - adjustable frame mounted wall, beneath x-ray table, or a mobile frame on wheels. It positions and holds x-ray cassette. |
| radiopaque | areas of high density on an x-ray. (white color) Ex: bone or body organ |
| radiolucent | areas of low density on an x-ray. (black color) Low radioLucent. Ex: air in lungs or body cavity |
| roentgenography | radiography; process of recording x-rays |
| gallium-67 (radiopharmaceutical drug that emits gamma rays) | IV drug that detects inflammation, infection, and benign, and cancerous tumors. |
| indium-III (RP drug that emits gamma rays) | IV drug used to look for cancerous tumors or cancerous cells of endocrine system, ovary, or colon. |
| iodine-123 and iodine-131 (RP drug) | IV drug used to image the thyroid gland. HINT: iodine deficiency causes thyroid issues. |
| krypton-81m (RP drug) | Inhaled gas used to image the lung. |
| technetium-99m (RP drug) | Iv drug used to image many different areas of the body. (most common radiopharmaceutical used in nuclear imaging) |
| thallium-201 (RP drug) | IV drug used to image the heart. (metal is so soft it can be cut with a knife) |
| xenon-133 (RP drug) | Inhaled gas used to image the lungs. |
| MRI scan | Does not use x-rays. No radiation exposure. Gadolinium is a metallic element that responds to a magnetic field. It can be injected by IV or into a body cavity to produce an enhanced MRI image. |
| CT/CAT scan | uses x-rays and a computer to create an image. Creates 2D images or slices of parts of the body. It scans the body. |
| electron beam tomography (EBT) | uses a beam of electrons and a computer to create an image. Full body scan. Used for screening tests. |
| positron emission tomography (PET) | uses radioactive substances that emit positrons. Is also tomography. Produces images of the physiology and metabolism of an organ. |
| scintigraphy | process of recording a point of light (photon). The computer compiles the flashes of light into a 2D image. |
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