Radiology

Radiation is the emission and propogation of energy through space or a substance in the form of waves or particles. Radioactivity is the process by which certain unstable atoms or elements undergo spontaneous degeneration, or decay, in an effort to attain a more balanced nuclear state

Lead-lined cylinder that extends from the opening of the metal housing of the tubehead; it aims and shapes the x-ray beam

What is the source in the x-ray tubehead that supplies enough energy to generate x-rays?

What is the purpose of the positive anode?

What type of radiation is most detrimental to the pt and radiographer?

What type of x-ray interaction is responsible for producing densities on film and making dental radiographs possible?

What effect does an increase of kVp have on a film?

A film with low contrast is useful for the detection of _________ and a film with low contrast has many shades of ________

Milliamperesegulate what?

true or false. Milliamperes x exposure time (sec) = milliamperes/second
True False

How does miliamperage affect density of a film?

What percent of the total electron energy produced is converted to x-rays?

Collimation of the x-ray beam does what to the primary beam?

true or false. A primary use of the intensifying screen used in radiography is to reduce the exposure time
True False

Which of the following devices are used to reduce radiation exposure to the pt?
collimator
aluminum filter
filter
diaphragm

What are the correct mA and kVp settings used on a pt?

How many x-ray impulses occur in 1 second?

How will the film appear if you increase the source to film distance?

a form of secondary radiation that is the result of an x-ray beam that has been deflected from its path by the interaction with matter

At the atomic level, which type of radiation effect accounts for most of the scatter radiation that takes place?

Which of the following results in the greatest radiation exposure reduction?
fast emulsion speed
collimation
aluminum filter

radiation that is capable of producing ions by removing or adding an electron to an atom

The propgation of wave-like energy (without mass) through space or matter, including; cosmic rays, gamma rays, x-rays, ultraviolet rays, visible light, infrared light, radar waves, microwaves, and radio waves

Low frequency electromagnification has _____ wavelength and ______ energy, and high frequency electromagnification has _____ wavelenth and _______ energy

weightless bundles of energy without an electrical charge that travel in waves with a specific frequency at the speed of light

The number of electrons passing through the cathode filament is adjusted by what?

The current passing from the cathode to the anode is controlled by what?

The distance from the source of radiation to the pt's skin

distance from the source of radiation to the tooth

distance from the source of radiation to the film

The intensity of the x-ray beam is __________ as the distance increases