Radiography Terms
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| Rem (roentgen-equivalent man) | radiation exposure is measured by them
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| 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.
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| 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.
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| scout film | preliminary x-ray taken to provide a view of an area before radiopaque contrast dye is administered.
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| 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.
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| radiopaque | areas of high density on an x-ray. (white color)
Ex: bone or body organ
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| radiolucent | areas of low density on an x-ray. (black color) Low radioLucent.
Ex: air in lungs or body cavity
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| roentgenography | radiography; process of recording x-rays
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| gallium-67 (radiopharmaceutical drug that emits gamma rays) | IV drug that detects inflammation, infection, and benign, and cancerous tumors.
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| 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.
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| iodine-123 and iodine-131 (RP drug) | IV drug used to image the thyroid gland. HINT: iodine deficiency causes thyroid issues.
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| krypton-81m (RP drug) | Inhaled gas used to image the lung.
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| technetium-99m (RP drug) | Iv drug used to image many different areas of the body. (most common radiopharmaceutical used in nuclear imaging)
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| thallium-201 (RP drug) | IV drug used to image the heart. (metal is so soft it can be cut with a knife)
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| xenon-133 (RP drug) | Inhaled gas used to image the lungs.
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| 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.
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| 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.
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| electron beam tomography (EBT) | uses a beam of electrons and a computer to create an image. Full body scan. Used for screening tests.
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| positron emission tomography (PET) | uses radioactive substances that emit positrons. Is also tomography. Produces images of the physiology and metabolism of an organ.
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| scintigraphy | process of recording a point of light (photon). The computer compiles the flashes of light into a 2D image.
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