Chapter One

Question 1

define density

Answer 1

the overall darkness of a film

Question 2

how is density determined

Answer 2

how much silver remains on the film after processing

Question 3

what is the formula to find the density of a film

Answer 3

log of the incident light/transmitted light

Question 4

where does the incident light come from

Answer 4

light from the viewbox

Question 5

transmitted light passes from the ______ thought the ________

Answer 5

viewbox; film

Question 6

how do you figure the log of a number

Answer 6

you count the zeros

Question 7

what is the log of 100,000/10,000

and what is the density

Answer 7

log of 100=2

therefore density is 2

Question 8

what are the three major factors that influence the amount of radiographic density of a film

Answer 8

technical exposure factors
patient
equipment

Question 9

what is the relationship between mA and density

direct or indirect

Answer 9

directly proportional

Question 10

to see a visible difference in radiographic density; increase( or decrease) mAs by _____

Answer 10

30%

Question 11

what is the equation for the 30% rule

Answer 11

old mAs(30%) + old mAs = new mAs