Calculations of Radiography Flashcards
1
Q
What does Kilovoltage (kV) control?
A
Penetrating power
2
Q
What does kV refer to?
A
size of electrical potential difference
3
Q
if kV is too HIGH…
A
Contrast will be too LOW
4
Q
if kV is too LOW…
A
Contrast will be too HIGH
5
Q
What does mA refer to?
A
Number of electrons produced at the cathode by thermionic emission
6
Q
Higher mA…
A
The blacker the film
7
Q
Lower mA…
A
The lighter the film
8
Q
Equation for mAs
A
mA x s
9
Q
Equation for mA
A
mAs / s
10
Q
Equation for S
A
mAs / mA
11
Q
If the kV is raised by 10…
A
mAs should be halved
11
Q
A
