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LXMO Exam 2024!!
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Term 1 of 64
Milliamperage- seconds (mAS)
Below 70 kvP, there are no characteristic photons produce, above 70 kvP, about 15% of the
beam is characteristic. Wavelength and energy of the beam is heterogeneous.
Refers to the number of photons produced per second during an exposure. Total dose is
directly proportional to the amount of mA inputted. mA is responsible for controlling
radiographic density, quantity of x-rays produced and is controlled by adjusting the
filament heat.
A line in the center of the x-ray beam and perpendicular to the long axis of the x-ray tube.
Refers to the total quantity of radiation in the exposure. It is the amount of milliamperage
(MA) multiplied by exposure time (S) mAS= MA x (S)
Definition 2 of 64
The closer you are to the source of radiation, the more exposure you will receive and vice-versa.
As distance increases, exposure decreases; as distance decreases, exposure increases.
Direct square law
Ohm's law
Inverse square law
Reciprocity law
,Definition 3 of 64
A value of the heat unit formula that varies depending on the generator used.
Frequency
Latent Image
Photon
Rectification Constant
Term 4 of 64
Actual focal spot
A value of the heat unit formula that varies depending on the generator used.
Imaging modality that provides real time viewing of x-ray images in motion.
X-rays that are traveling in a useful direction exit via the tube port.
Area on the target surface that is struck by the electron steam.
Definition 5 of 64
mA is found by dividing the mAs from time (S)
mA formula
actual ma
exposure time in seconds (s) formula
l in the ma formula l/h stands for
, Term 6 of 64
Grid or Bucky
Usually consists of cassette and film
Force or strength of electron flow in the circuit
Device that protects film from being fogged by scatter radiation
X-rays that are traveling in a useful direction exit via the tube port.
Term 7 of 64
American Society of Radiologic Technologist (ASRT)
World's oldest and largest professional radiologic science organization. Discovered in
Chicago 1920.It offers many services to its members including continuing education, annual
national meeting and professional newsletter.
The closer you are to the source of radiation, the more exposure you will receive and vice-
versa. As distance increases, exposure decreases; as distance decreases, exposure
increases.
Discovered x-rays in 1895
Formed in 1969. National organization that formally conducts the accreditation of schools
of radiologic technology, accredits 637 radiography programs in US.
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