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
Any body cells except 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 or gamma radiation
Soft Radiation
The longest wave of radiation
PID
Portion Indicating Device
ALARA
as low as reasonable achievable
Maximum Permissible Dose (MPD)
The maximum accumulated dose that persons who are occupationally exposed may have at any given time of their life.
Inverse Square Law
States that the intensity of radiation is inversely proportional to the square of the distance from the source of the radiation to the point of measurement.
Half Value Layer
Thickness of a specified material that when introduced into the path of a given beam of radiation reduces the exposure rate by half.
