Definitions
Factors Controlling Density
Film Screen Processing
Grids
Misc.
100
Distance from the source of radiation to the image receptor
What is SID
100
This factor controls density
What is mAs
100
This comprises the base and the emulsion
What is film
100
What is helpful reducing the amount of scatter radiation that reaches the film?
What is a grid
100
When the SID is doubled, this happens to the density
What is density is reduced by 1/4
200
Distance from the anatomic part being imaged to the image receptor
What is OID
200
As Robin says..."The intensity of the x-ray beam is inversely proportional to the square of the distance between the source and the image receptor"
What is the inverse square law
200
This film screen speed is considered to be fast and uses a lower dose of radiation
What is 400
200
In this kind of grid, the lead strips are parallel to one another
What is a linear grid
200
The thicker part of the anatomy should be placed under this part of the x-ray tube
What is the cathode
300
Any misrepresentation of an anatomic structure on an image receptor that alters its size and/or shape
What is distortion
300
This factor directly affects density, although not in a directly proportional relationship
What is kVp
300
A base, reflecting or absorbing layer, phosphor layer, and a protective layer are all components of this
What is an intensifying screen
300
In this kind of grid, the lead strips are angled to coincide with divergence of the x-ray beam
What is a focused grid
300
A radiograph with few gray tones, primarily exhibiting black and white, describes this type of contrast
What is high scale of contrast
400
The sharpness with which anatomic structures are displayed on an image receptor
What is recorded detail
400
Limits the size of the x-ray beam and affects density by reducing the amount of scatter radiation produced
What is beam restriction
400
Scratches, temperature fluctuations, contamination, and fogged films describes...
What is processor malfunctions
400
What is decreased density along the outside of the film caused by absorption of image forming rays?
What is grid cutoff
400
This consists of a toe, body, shoulder, d-max, etc...
What is H&D curve
500
Controls image blur. Small is better!!
What is focal spot size
500
This has a negligible effect of density and is LARGELY a radiation protection accessory
What is filtration
500
This part of radiographic film consists of sensitivity specks and gelatin in which silver halide crystals are suspended
What is emulsion
500
If this error occurs, the result will be normal density in the middle of the image with decreased density on the sides.
What is upside down grid
500
Differential absorption of the x-ray beam is a function of this interaction
What is photoelectric interaction
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