FORMULAS-U1

Question 1

Relationship between mA, mAs and s:

Answer 1

mAs
—————-
mA I S

Question 2

Inverse square law:

Answer 2

Intensity 1/ Intensity 2 = Distance 2^2/ Distance 1^2

Question 3

Square Law:

Answer 3

mAs (new)/ mAs (old) = distance^2 (new) / distance^2 (old)

Question 4

What is the equation for intensity in the primary beam to the patient with KVP given?

Answer 4

I1/I2=(kVp1/kVp2)^2

Question 5

What is the equation for intensity in the remnant beam to the IR with KVP given?

Answer 5

I1/I2=(kVp1/kVp2)^5