Review
for
the
Test
Random Thoughts
100
First xray was taken by
Wilhelm Conrad Roentgen
100
radiopaque
a white or light appearance of a structure on a processed radiograph
100
heart of the xray generating system is the
xray tube
100
maximum permissible dose of radiation for a perion who occupationally exposed
5.0 rem per year
100
the fundamental techniques for intraoral digital radiography
direct imaging indirect imaging
200
radiolucent
a dark appearance of a structure on a processed radiograph
200
the ______the wavelengths, the greater their energy and their usefulness
shorter
200
what exposure controls contrast
kilovoltage
200
how far away from the xray unit do you need to be
6 feet
200
the term ____is used to describe areas that appear dark on the image; _____is the term used to describe areas that appear white or light gray
radiolucent radiopaque
300
filtration is used to ____ and the discs made of _____
remove long wavelengths from beam aluminum
300
which of the digital techniques requires scanning of image receptors
in phosphor storage imaging (indirect digital imaging) a scanner is required to read the information stored on the phosphor storage plate (PSP)
300
lymphocytes salivary glands kidney muscle which is most sensitive to radiation
lymphocytes
300
5 steps in developing radiographs
developing rinsing fixing washing drying
300
Three types of radiation
Primary, secondary, scatter
400
the period of time between x-ray exposure and the appearance of symptoms
latent period
400
if your image is fuzzy or blurred it is _____ To reduce it you
penumbra limiting movement
400
components of a x-ray machine
tubehead extension arm control panel
400
what is chronic radiation
when small doses of radiation is received over a long period of time
400
what will smaller film crystal size do
improve the sharpness of the image
500
release of electrons from the rungsten filament refers to
thermionic emission
500
range of shades of gray between black and white on an image
contrast
500
what color of xray is preferred? it is said to have?
gray low contrast
500
what is affected if the exposure time is changed
number of xrays produced
500
3 examples of film holders
eezee-grip endo ray XCP Rinn disposable block
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