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Med Term Ch 20


Cineradiography Use of motion picture techniques to record a series of x-ray images during fluoroscopy.
Comuted tomography Diagnostic x-ray procedure whereby a cross-section image of a specific body segment is produced; also known as computed axial tomography.
Contrast studies Materials are injected to obtain contrast with surrounding tissue when shown on the x-ray film.
Flourescence Emission of glowing loght that results from exposure to and absorption of radiation from x-rays.
Fluoroscopy process of using x-rays to produce a fluprescent image on an image intensifier.
Gamma camera Machine to detect radiopharmaceuticals in the body for diagnostic purposes.
Gamma rays High-energy rays emitted by radioactive substances.
Half-life Time required for a radioactive substance to lose half its radioactivity by disintegration.
Interventional radiology Therapeutic procedures that are performed by radiologist.
In vitro A process, test, or procedure in which something is measured or observed outside a living organism.
In vivo A process, test, or procedure in which something is measured or observed in a living organism.
Ionization Transformation of electronically neutral substances into electrically charged ones.
Labeled compound Radiopharmaceutical.
Magnetic Resonance (MR) A magnetic field and radio waves are used to form sagittal, coronal, and axial images of the body.
Nuclear medicine Medical specialty that studiesthe uses of radioactive substances (radionuclides) in diagnosis of disease.
Radioimmunoassay Test that combines the use of radioactive chemicals and antibodies to detect minute quantities of substances in a patient’s blood.
Radioisotope Radioactive form of a substance; radionuclide.
Radiology Medical specialty concerned with the study of x-rays and their use in the diagnosis of disease; includes other forms of energy, such as ultrasound and magnetic waves.
Radiolucent Permitting the passage of most x-rays, appears black on x-ray film.
Radionuclide Radioactive chemical element that gives off energy in the form of radiation.
Radiopaque Obstructing the passage of x-rays, appears white on the x-ray film.
Radiopharmaceutical Radioactive drug that is administered safely for diagnostic purposes.
Roentgenology Study of x-rays; radiology
Scintigraphy Production of two-dimensional images of the distribution of radioactivity in tissues after the administration of a radiopharmaceutical imaging agent.
Single-photon emission computed tomography (SPECT) Radio tracer substance is injected intravenously and a computer is used to create a three-dimensional image.
Tagging Attaching a radionuclide to a chemical and following its course in the body.
Tracer studies Radionuclides are used as tags, or labels, attached to chemicals and followed as they migrate through the body.
Transducer Handheld device that sends and receives ultrasound signals.
Uptake Rate of absorption of a radionuclide into an organ or tissue.
Ventilation/perfusion studies Radiopharmaceutical is inhaled and injected and its passage thorough the respiratory tract is imaged.
Created by: suprant