Basic Physics
Exposure and Image Quality
Digital Imaging
Radiation Biology
Wild Card
100
Particles located in an orbit around the nucleus of an atoms.
What is an electron?
100
Generalized unwanted exposure on an image.
What is fog?
100
A cassette-based digital x-ray system.
What is Computed Radiography?
100
The three principle methods used to protect technicians from unnecessary radiation exposure.
What are time, distance & shielding?
100
Sharpness or detail of the image.
What is spatial resolution?
200
The distance from one crest to another in a sine wave.
What is wavelength?
200
The difference in density between adjacent portions of the film.
What is contrast?
200
The first digital imaging in radiology.
What is CT scanning?
200
The unit commonly used to report occupational exposure in the US.
What is rem (or mrem)?
200
When a neutral atom gains or loses an electron.
What is ionization?
300
The quantity of electrons flowing through a circuit.
What is current?
300
The mass density of the radiographic subject.
What is tissue density?
300
Marks, exposures or images on a radiograph that are not part of the intended image.
What are artifacts?
300
The amount of energy (x-ray) absorbed by irradiated tissue.
What is "absorbed dose"?
300
The two types of digital radiography conversion.
What are direct and indirect conversion?
400
The purpose of a transformer.
What is vary the voltage?
400
The difference between the subject or part and the IR.
What is object-image distance (OID)?
400
Uses a flat-panel detector.
What is Digital Radiography?
400
Occur with high doses and are predictable.
What are short-term, somatic effects?
400
Changes or mutations to the genes of reproductive cells.
What are genetic effects?
500
Electromagnetic energy is expressed in this form.
What is a sine wave?
500
The unsharp, fuzzy appearance of margins of structures within the radiographic image.
What is penumbra?
500
Allows the tech to add text or other useful information to the image.
What is annotation?
500
This law defines the sensitivities of different cells in the body to radiation effects.
What is the Law of Bergonie and Tribondeau?
500
Differences in tissue densities within the patient
What is subject contrast?
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