Chapter 20 Radio vocabulary Flashcards
computed tomography (CT)
Diagnostic x-ray procedure that produces a cross-sectional image of a specific body segment
contrast studies
Radiopaque materials are injected to obtain contrast with surrounding tissue when shown on x-ray film
gamma camera
Machine to detect gamma rays emitted from radiopharmaceuticals
gamma rays
High-energy rays emitted by radioactive substances in tracer studies
half-life
Time required for a radioactive substance to lose half its radioactivity by disintegration
interventional radiology
Therapeutic or diagnostic procedures performed by a radiologist
in vitro
Process, test, or procedure performed, measured, or observed outside a living organism
in vivo
Process, test, or procedure is performed, measured, or observed within a living organism
ionization
Transformation of electrically neutral substances into electrically charged particles
magnetic resonance imaging (MRI)
Use of magnetic field and radio waves to produce sagittal, coronal, and axial images of the body
nuclear medicine
Medical specialty that studies uses of radioactive substances in diagnosis of disease
positron emission tomography (PET
Use of positron-emitting radioactive substances given intravenously to create a cross-sectional image of cellular metabolism
radioimmunoassay
Test that combines radioactive chemicals and antibodies to detect minute quantities of substances in a patient’s blood
radioisotope
Radioactive form of an element ; radionuclide
radiolabeled compound
Radiopharmaceutical; used in nuclear medicine studies
radiology
Medical specialty concerned with the study of x-rays and their use in diagnosis of disease
radiolucent
Permitting the passage of x-rays
radionuclide
Radioactive form of an element; radioisotope
- radiopaque
Obstructing the passage of x-rays
- radiopharmaceutical
Radioactive drug used for diagnostic and therapeutic purposes
- scan
Image of an area, organ or tissue of the body obtained from ultrasound, radioactive tracer studies, CT, or MRI
- scintigraphy
Diagnostic nuclear medicine test using radiopharmaceuticals and gamma cameras to create images
single photon emission computed tomography (SPECT)
Radioactive tracer is injected intravenously and a computer reconstructs a 3D-image based on a composite of many views
tagging
Attaching a radionuclide to a chemical and following its path in the body
tracer studies
Use of radionuclide tags attached to chemicals and followed as they travel through the body
ultrasonography (US, U/S)
Diagnostic technique that projects and retrieves high-frequency sound waves as they echo off body parts
ultrasound transducer
Handheld device that sends and receives ultrasound signals
uptake
Rate of absorption of a radionuclide into an organ or tissue
ventilation-perfusion studies
Ventilation and perfusion of a radiopharmaceutical followed by imaging its passage through the respiratory tract
