Concept of radiation protection that states all exposures should be kept "as low as reasonably achievable"

Negative electrode in the x-ray tube

Overall darkness or blackness on an image

Keeps electrons suspended in an electron cloud at the cathode and directs them toward the target. When the exposure button is pressed, electrons rapidly cross from the cathode to strike the anode

Highest voltage of x-ray tube used during an exposure

Time between exposure to ionizing radiation and appearance of image

One one-thousandth of an ampere; a unit of measurement used to describe the intensity of an electrical current

Most penetrating beam produced at the target of the anode

Radiolucent and examples

Structures that are less dense and permits the beam to pass through causing the images to appear dark or black. Ex. depressions, cavities, or openings in bone (sinus, canal, or foramen)

Form of secondary radiation that occurs when an x-ray beam has been deflected from its path by interaction with matter

X-radiation that is created when the primary beam interacts with matter

High-energy ionizing electromagnetic radiation. Invisible and undetectable by the senses. No mass or weight. No charge. Travel at speed of light. Travel in short-wavelength, high frequency waves. Travel in straight line and can be deflected or scattered.

Intraoral technique of exposing dental images where the x-ray beam is directed, perpendicular to an imaginary line which bisects the angle

When the extension arm drifts after being positioned for exposure, and the central ray is positioned off the film.

Caused by insufficient vertical angulation, or vertical angulation that is too "flat" (tooth appears too long)

Results from excessive vertical angulation (teeth appear too short)

Process by which electrons are removed from atoms, causing the harmful effects of radiation in humans

Radiopaque and examples

Structures that are dense and resist the passage of radiation causing the image to appear light or white depending on the desity. Ex. bone, amalgam fillings, implants, and braces.

Cephalometric radiograph

Shows the side view of your head, exposing teeth, jaws, and surrounding structures

Filmless method of capturing an image and displaying it by using an image receptor, an electronic signal, and a computer to process and store the image

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Radiology Terms

Term	Definition
ALARA	Concept of radiation protection that states all exposures should be kept "as low as reasonably achievable"
Cathode	Negative electrode in the x-ray tube
Density	Overall darkness or blackness on an image
Focusing cup	Keeps electrons suspended in an electron cloud at the cathode and directs them toward the target. When the exposure button is pressed, electrons rapidly cross from the cathode to strike the anode
Kilovoltage (kVp)	Highest voltage of x-ray tube used during an exposure
Latent period/image	Time between exposure to ionizing radiation and appearance of image
Milliamperage (mA)	One one-thousandth of an ampere; a unit of measurement used to describe the intensity of an electrical current
Primary radiation	Most penetrating beam produced at the target of the anode
Radiolucent and examples	Structures that are less dense and permits the beam to pass through causing the images to appear dark or black. Ex. depressions, cavities, or openings in bone (sinus, canal, or foramen)
Scatter radiation	Form of secondary radiation that occurs when an x-ray beam has been deflected from its path by interaction with matter
Secondary radiation	X-radiation that is created when the primary beam interacts with matter
X-ray	High-energy ionizing electromagnetic radiation. Invisible and undetectable by the senses. No mass or weight. No charge. Travel at speed of light. Travel in short-wavelength, high frequency waves. Travel in straight line and can be deflected or scattered.
Bisecting technique	Intraoral technique of exposing dental images where the x-ray beam is directed, perpendicular to an imaginary line which bisects the angle
Cone-cutting	When the extension arm drifts after being positioned for exposure, and the central ray is positioned off the film.
Elongation	Caused by insufficient vertical angulation, or vertical angulation that is too "flat" (tooth appears too long)
Foreshortening	Results from excessive vertical angulation (teeth appear too short)
Ionization	Process by which electrons are removed from atoms, causing the harmful effects of radiation in humans
Radiopaque and examples	Structures that are dense and resist the passage of radiation causing the image to appear light or white depending on the desity. Ex. bone, amalgam fillings, implants, and braces.
Cephalometric radiograph	Shows the side view of your head, exposing teeth, jaws, and surrounding structures
Digital image	Filmless method of capturing an image and displaying it by using an image receptor, an electronic signal, and a computer to process and store the image

Created by: magthorrr

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