Radiology Module 9 Flashcards
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Radiopaque:
Image is — dense and allows — x-rays to pass through
Appear as — areas on film
More
Less
Light
Radiolucent areas:
Object is —– and permits passage of —– x-rays
Appear as — areas on film
Less dense
More
Black
What are the 2 primary visual characteristics that influence the diagnostic quality of radiographs
Density
Contrast
Density is the?
Overall degree of darkness
Increasing —, —-, or —-
Increases density or makes film appear?
Kvp
Ma
Exposure time
Appears darker
If your pt is larger you need to —- exposure time
Increase
Contrast is the?
Difference in degree of black/white between adjacent structures.
High contrast films appear?
Black/white
Low contrast films appear
As multiple shades of gray
The best films have high or low contrast?
In between
Low if you had to choose one
Contrast is influenced by the?
Kvp
Kvp deals with — of x-rays
Quality
Low kvp is <—? And results in — contrast
70
More
High kvp is >—– and results in —- contrast
90
Low
Short scale contrast goes with —-
Kvp and —-contrast
Low
High
Long scale contrast deals with —-
Kvp and —– contrast
High
Low
What are the 3 geometric characteristics of a radiograph
Sharpness
Magnification
Distortion
Sharpness is influenced by what 3 factors
Focal spot
Film composition
Movement
The fuzzy unclear areas surrounding a radiograph are termed?
Penumbra
The focal spot is the — —-
Tungsten target
The tungsten target or focal spot can be how big?
0.6-1.0mm
A — tungsten target produces a sharper (more detailed) image?
Smaller
Emulsion with —- crystals produces less sharpness!
Larger
faster films
Movement in —, —, and — all result in blurred images
Pt
Film tube head
Target (tooth) to film distance is determined by?
PID length
Long PID offers more — rays and
— Magnification
Parallel
Less
Short PID offers more — rays and
— magnification
Divergent
More
Object (tooth) to film distance:
The closer they are the — magnification
Less
Object (tooth) to film should be as —- as possible to each other
Parallel
X-ray beam angulation is —- to the tooth and film
Perpendicular
—- is the unequal magnification of a tooth/object
Distortion
