RAD 100 FINAL EXAM REVIEW QUESTIONS AND ANSWERS
What term is used for density when using CR/DR? - CORRECT ANSWER✅✅brightness
Define radiographic density - CORRECT ANSWER✅✅the amount of blackening on a radiographic image;
the amount of image receptor exposure
Define contrast - CORRECT ANSWER✅✅the difference in adjacent shades of gray in a radiographic
image
What is the primary controller of radiographic density/image receptor exposure? - CORRECT
ANSWER✅✅mAs
What is the primary controller of radiographic contrast? - CORRECT ANSWER✅✅kVp
Which factor controls the penetrating power of the x-ray beam? - CORRECT ANSWER✅✅kVp
List the three prime factors - CORRECT ANSWER✅✅mAs, kVp, SID
List the four image quality factors - CORRECT ANSWER✅✅density, contrast, detail, and distortion
How many possible effects were there for the mAs, kVp, and SID lab exercises? What were they? -
CORRECT ANSWER✅✅3; increase in density, decrease in density, no change
State the three versions of the mAs formula - CORRECT ANSWER✅✅mA x s = mAs
mA= mAs/s
s= mAs/mA
When converting from milliseconds to decimals ________ by __________
, When converting from decimals to milliseconds ________ by __________ - CORRECT
ANSWER✅✅divide; 1000
multiply; 1000
Calculate mAs:
1. 200 mA, .01s
2. 400 mA, 2/5 s
3. 150 mA, 200 ms - CORRECT ANSWER✅✅1. 2 mAs
2. 160 mAs
3. 30 mAs
Calculate mA:
1. 30 mAs, 3/20 s
2. 150 mAs, 200 ms
3. 100 mAs, .25 s - CORRECT ANSWER✅✅1. 200 mA
2. 750 mA
3. 400 mA
Calculate time in ms, reduced fx, fx/1000, and decimals
1. 100 mAs, 100 mA
2. 25 mAs, 50 mA
3. 30 mAs, 300 mA - CORRECT ANSWER✅✅1. 1 s, 1000 ms, 1, 1000/1000, 1.0
2. 500 ms, 1/2, 500/1000, .5
3. 100 ms, 1/10, 100/1000, .1
What are the 2 main points of the mAs lab exercise? - CORRECT ANSWER✅✅1. mAs has a direct,
proportional relationship with density
2. to maintain density, you must double mA and halve time or halve mA and double time
What term is used for density when using CR/DR? - CORRECT ANSWER✅✅brightness
Define radiographic density - CORRECT ANSWER✅✅the amount of blackening on a radiographic image;
the amount of image receptor exposure
Define contrast - CORRECT ANSWER✅✅the difference in adjacent shades of gray in a radiographic
image
What is the primary controller of radiographic density/image receptor exposure? - CORRECT
ANSWER✅✅mAs
What is the primary controller of radiographic contrast? - CORRECT ANSWER✅✅kVp
Which factor controls the penetrating power of the x-ray beam? - CORRECT ANSWER✅✅kVp
List the three prime factors - CORRECT ANSWER✅✅mAs, kVp, SID
List the four image quality factors - CORRECT ANSWER✅✅density, contrast, detail, and distortion
How many possible effects were there for the mAs, kVp, and SID lab exercises? What were they? -
CORRECT ANSWER✅✅3; increase in density, decrease in density, no change
State the three versions of the mAs formula - CORRECT ANSWER✅✅mA x s = mAs
mA= mAs/s
s= mAs/mA
When converting from milliseconds to decimals ________ by __________
, When converting from decimals to milliseconds ________ by __________ - CORRECT
ANSWER✅✅divide; 1000
multiply; 1000
Calculate mAs:
1. 200 mA, .01s
2. 400 mA, 2/5 s
3. 150 mA, 200 ms - CORRECT ANSWER✅✅1. 2 mAs
2. 160 mAs
3. 30 mAs
Calculate mA:
1. 30 mAs, 3/20 s
2. 150 mAs, 200 ms
3. 100 mAs, .25 s - CORRECT ANSWER✅✅1. 200 mA
2. 750 mA
3. 400 mA
Calculate time in ms, reduced fx, fx/1000, and decimals
1. 100 mAs, 100 mA
2. 25 mAs, 50 mA
3. 30 mAs, 300 mA - CORRECT ANSWER✅✅1. 1 s, 1000 ms, 1, 1000/1000, 1.0
2. 500 ms, 1/2, 500/1000, .5
3. 100 ms, 1/10, 100/1000, .1
What are the 2 main points of the mAs lab exercise? - CORRECT ANSWER✅✅1. mAs has a direct,
proportional relationship with density
2. to maintain density, you must double mA and halve time or halve mA and double time
