Key Terms for Radiography (2) Flashcards
Short Term Effects
Effects that are seen within minutes, days or weeks.
Long Term Effects
Effects that appear after years, decades, or generations
Somatic Cells
All the cells in the body, with the expectation of the reproductive cells.
Genetic Cells
The cells contained within the testes and ovaries
Radiosensitive cells
A cell that is sensitive to radiation
Radioresistant Cells
A cell that is resistant radiation
Density
The overall darkness or blackness of an image.
Gray (Gy)
A unit for measuring absorbed dose.
Hard Radiation
Rays of high energy and extremely short wavelengths
Radiation Absorbed Dose (RAD)
A unit for measuring absorbed dose
Milliamperage (MA)
The Quantity of the x-ray
Sievert (SV)
Used to compare the biological effects of various types of radiation.
Radiolucent
The portion of the radiograph that is dark. Structures that lack density
Kilovoltage
The x-ray tube peak voltage used during an exposureC
Contrast
How sharply dark and light areas are differentiated or separated on an image.
Central Beam (ray)
The central portion of the primary beam
Radiopaque
The portion of an image that is light or white
Roentgen equivalent in man (REM)
The traditional unit of the dose equivalent
Roentgen
The traditional unit of exposure of x-rays.
The quantity of x-ray radiation that produces an electrical charge
( 2.58 x 10-4 )
Soft Radiation
The longest wave of radiation
PID
Portion Indicating Device
ALARA
as low as reasonable achievable
Maximum Permissible Dose (MPD)
Maximum dose equivalent that a body is permitted to recieve in a specific period.
the dose of radiation that the body can endure with little or no injury.
Inverse Square Law
The thickness of material that when placed in the path of the x-ray beam, reduces the exosure rate by one-half.
