Formulas Flashcards
1
Q
Do grids decrease production of scatter?
A
No! They reduce amount of scatter reaching the IR
2
Q
Scatter is what?
A
Density
3
Q
Grid ratio
A
Height of pb strips/ distance between pb strips
4
Q
When dealimg with grids, you what on the left/ old side
A
Divide
5
Q
What do you do on the right/new side with a grid
A
Multiply
6
Q
Conversion factor for 5:1
A
2
7
Q
6:1
A
3
8
Q
8:1
A
4
9
Q
12:1
A
5
10
Q
16:1
A
6
11
Q
Screens: every time you double the SS you do what to the mAs?
A
Cut it in half
12
Q
Cut screen speed in half you do what to mAs?
A
Double it
13
Q
Increased screen speed=?
A
Decreased pt dose, and detail
14
Q
Decreased screen speed=?
A
Increased pt dose and detail
15
Q
Inverse square law
A
Old mAs/ new mAs= old distance (sq)/ new distance (sq)
