ABSORBED DOSE correct answers amount of ionizing radiation absorbed per unit mass of
irradiated material.
ASYMMETRIC JAWS correct answers four independent x-rays collimators that are used to
define radiation treatment field.
ATTENUATION correct answers removal of energy from a beam of ionizing radiation when it
traverses matter, accomplished by disposition of energy in matter and by deflection of energy out
of the beam
BETATRON correct answers electron accelerator that uses magnetic induction to accelerate
electrons in circular path; also capable of producing photons.
BIOPSY correct answers removal of a small piece of tissue for examination under the
microscope.
BRACHYTHERAPY correct answers placement of radioactive nuclide or nuclides in or on
neoplasm to deliver a cancericidal dose
CANCER correct answers term commonly applied to malignant disease; abnormal growth cells.
CANCERICIDAL DOSE correct answers dose of radiation that results in the death of cancer
cells
CARCINOGEN correct answers any cancer producing substance or material such as nicotine,
radiation, or ingested uranium.
, CARCINOMA correct answers cancer that arises from epithelial tissue, either glandular or
squamous epithelium.
CERROBEND BLOCK correct answers beam shaping device made of lead alloy that attenuates
the x-ray beam, preventing exposure of normal
CHROMOSOME correct answers unit of genetic information that guides cytoplasmic activities
of the cell and transmits hereditary information tissue
COBALT 60 correct answers radioisotope with the half-life of 5.26 years, average gamma ray
energy of 1.25 MeV (range 1.17 to 1.33 MeV) and ability to spare skin with build up depth in
tissue of 0.5 cm.
COLLIMATOR correct answers diaphragm or system of diaphragm made of radiation absorbing
material that defines dimension and direction of beam.
CONFORMAL RADIATION correct answers treatment designed to deliver radiation to the exact
target volume as seen on any plane (e.g.transverse, sagittal, vertex view) requires a three
dimensional treatment planning system.
CONTOUR correct answers reproduction of an external body shape, typically in the transverse
plane at the level in the central axis of the beam
CURE correct answers usually a 5 year period after completion of treatment during which time
the patient exhibits no evidence of disease
DECAY or DISINTEGRATION correct answers transformation of radioactive nucleus, resulting
in emission of radiation
DIFFERENTIATION correct answers acquisition of cellular function and structure that differs
from function and structure of original cell type.