Radiographic Quality + Exposure Flashcards
1
Q
Increased kVp gives you what contrast
A
Long scale/ low contrast (gray)
2
Q
Decreased kVp gives you what contrast
A
Short scale/ high contrast (black and white)
3
Q
mAs primarily affects what
A
x ray quantity (density)
4
Q
kVp primarily affects what
A
x ray penetration (contrast)
5
Q
How does kVp affect scatter
A
More kVp = more scatter
6
Q
At what thickness of your subject does scatter increase
A
> 9cm
7
Q
What is scatter
A
x-ray beam scattering in different directions after interacting with body tissue or other matter.
8
Q
What two things does scatter cause
A
unwanted film exposure
decreased contrast
9
Q
What are four ways to minimize scatter
A
- Beam limiting
- Filters (x ray tube and collimator)
- Grids
- Air gap
