Ch. 20 Vocabulary Quiz
half-life
Time required for a radioactive substance to lose half its radioactivity by disintegration
angiography
blood vessels
cholangiography
blue vessel (ducts)
computed tomography (CT)
diagnostic x-ray procedure whereby a cross-sectional and other images of a specific body segment are produced
upper GI series
esophagus, stomach, and small intestine
gamma rays
high-energy rays emitted by radioactive substances
barium enema
lower gastrointestinal tract
lymphoscintigraphy
lymphatic system
gamma camera
machine to detect gamma rays emitted from radiopharmaceuticals during scanning for diagnostic purposes
magnetic resonance imaging (MRI)
magnetic field and radio waves produce images of the body in three planes (coronal, sagittal, and axial)
contrast studies
materials are injected to obtain surrounding tissue when shown on x-ray film
radiology
medical specialty concerned with the study of x-rays and their use in the diagnosis of disease
nuclear medicine
medical specialty that studies the uses of radioactive substances in diagnosis of disease
radiolucent
permitted the passage of x-rays
in vivo
process, test, or procedure performed, measured, or observed in a living organism
in vitro
process, test, or procedure performed, measured, or observed outside a living organism
radionuclide isotope
radioactive form of an element
PET (positron emission tomography)
radioactive substance is given intravenously and a cross-sectional image is created of cellular metabolism based on local concentration of the radioactive substance
radiolabeled compound
radiopharmaceutical used in nuclear medicine studies
pyelography
renal pelvis of kidney and urinary tract
myelography
spinal cord
radio immunoassay
test that combines radioactive chemicals and antibodies to detect minute quantities of substances in patient's blood
interventional radiology
therapeutic procedures performed by a radiologist
ionization
transformation of electrically neutral substances into electrically charged particles
hysterosalpingography
uterus and fallopian tubes