Xray Basics
This is the traditional unit of exposure to x-rays. The person it is named after discovered X-rays.
Who is Wilhelm Roentgen?
An electron carries a _________ electrical charge
What is negative?
The primary purpose of the __________ is to reduce radiation to tissues surrounding the area being examined.
These cells are less sensitive to radiation.
What are muscle cells?
_____ effects of exposure to radiation do not affect future generations.
_____ effects of exposure to radiation affect future generations.
What are somatic?
What are genetic?
The overall darkness or blackness of an image
What is density?
This is the dense core of the atom & is composed of particles known as protons & neutrons.
What is the nucleus?
This is used to eliminate the longer, less penetrating x-rays from the direct beam.
Enamel on a tooth is (more or less) resistant to radiation.
What is less?
A pregnant dental assistant (can or cannot) safely expose x-rays throughout their entire pregnancy.
What is can?
This person exposed his hand to radiation for years. He is also credited with the first practical use of radiographs in dentistry.
Who is C. Edmund Kells?
Humans are exposed daily to this.
This term best describes radiations of natural origin.
It occurs naturally & includes cosmic radiation & terrestrial radiation.What is background radiation?
Glass surrounds the _______ of the _________.
These cells are the most sensitive to radiation.
What are sperm cells?
This term describes the amount of radiation the body can endure with little to no chance of injury.
Dental staff must be equal to or less than _____ rem per year.
What is Maximum Permissible dose?
What is 5?
This term refers to how sharply dark and light areas are differentiated or separated on a film, also known as differences in degrees of blackness on an image
What is contrast?
Xrays of shorter wavelengths have (more or less) energy and penetrate matter with (greater or lesser) ease than those with longer wavelengths.
What is more & greater?
This wire filament is composed of tungsten. It's purpose is to supply the electrons necessary to generate x-rays.
It includes the following, tunsten filament which produces electrons when heated & the molybdenum cup which focuses the electrons into a narrow beam.
What is the cathode?
This is often the first sign of x-ray dermatitis.
What is erythema?
True or False: As a dental professional you are allowed to hold a film in position while someone else exposes it.
What is FALSE?
All exposure to radiation is kept to a minimum is the ___________ concept.
What is ALARA?
"as low as reasonably achievable"
To create an x-ray you must have the following.
*Hint* Video on how an x-ray is produced
**RAD text: Figure 2-19
What are electrons, a target, & heating of the cathode?
This restricts the shape and size of the beam.
What is the lead collimator?
This is the most sensitive facial tissue to radiation.
What is the eye?
_______ is the time between exposure to x-rays and radiation damage.
What is the Latent period?