Screen Characteristics pt 1 Flashcards
1
Q
Intensifying screens are described by their _______
A
speed: how quickly or slowly it responds to X-ray energy
2
Q
What occurs if the speed is fast?
A
small amount of X-rays to produce a certain amount of light
3
Q
What occurs if the speed is slow?
A
large amount of X-rays to produce a certain amount of light
4
Q
Speed (fast and slow) in screen characteristics specifically refers to __________ or __________.
A
- Speed factor
- Intensifying factor
5
Q
Ex) Chest x-ray without a screen would require:
A
85 kV @ 50 mAs
6
Q
Ex) If a screen was used, the amount of X-rays to produce the same density would be significantly less:
A
85 kV @ 2.5 mAs
7
Q
Screen speed will always be described as a _________
A
whole number
8
Q
What are the relative numbers of Speed Factor?
A
- Detail (slow, fine, extremity): 50
- Par (medium speed): 100
- High Speed: 200
- Rare Earth: 400+
9
Q
What is a system?
A
film-screen combination provided by the manufacturer
