What is the minimum total filtration that is required by an x-ray machine that can operate in ranges above 70 kVp? a. 1.5 mm of aluminum equivalent b. 1.5 mm of lead equivalent c. 2.5 mm of aluminum...

What is the minimum total filtration that is required by an x-ray machine that can operate in ranges above 70 kVp?

a. 1.5 mm of aluminum equivalent

b. 1.5 mm of lead equivalent

c. 2.5 mm of aluminum equivalent

d. 2.5 mm of lead equivalent