FREE RADIOLOGY AND STUDY GAMES ABOUT RAD 121

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FREE RADIOLOGY AND STUDY GAMES ABOUT RAD 121

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -97 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: Problem Solving

What is the Time?mA 800 mAs 280

Answer:

.35 sec

Question 2: Problem Solving

What is the mAs?500mA .25 sec

Answer:

125 mAs

Question 3: Problem Solving

What is the missing factor?100 mA and 40" to 200 mA and _____"

Answer:

56.57 " round up to 57"

Question 4: What is the best way to change receptor exposure?

Answer:

mAs

Question 5: What is photographic Property?

Workbook p26

Answer:

Visibility of detail - includes receptor exposure and image contrast - the quality of the picture and what it contains (like a photo)

Question 6: Problem Solving

What is the Time?mA 200 mAs 50

Answer:

1/4 or .25 secs

Question 7: Problem Solving

What is the missing factor?360 mA and 72" to _____ mA and 48"

Answer:

160 mA

Question 8: Problem Solving

What is the mAs?36" and 40 mAs to 72" and _____mAs

Answer:

160 mAs

Question 9: Problem Solving

What is the missing factor?1/2 sec and 48" to _____ and 36"

Answer:

.28 sec

Question 10: Problem Solving

What is the mAs?mA 1600 Time 1/20

Answer:

80 mAs Question 11: Name the three formulas for mAs, mA, or Time when two of the three are known.

Answer:

mAs = mA x Time; mA = mAs / Time; Time = mAs / mA

Question 12: What changes to kVp for followup dry cast?

Answer:

small - medium + increase 5-7kVp; Large - increase 8-10kVp

Question 13: Problem Solving

What is the mA?time .16 mAs 256

Answer:

1600 mA

Question 14: Problem Solving

What is the missing factor?

• sec and 72" to _____ sec and 60"

Answer:

.69 sec Question 15: The time required to maintain a given receptor exposure is directly proportional to the square of the SID.

Answer:

t(1) / t(2) = (d(1))squared / (d(2))squared Question 16: What does the tech need to change to maintain receptor exposure for a full expiration chest compared to full inspiration?

Answer:

increase mAs by 30-35%

Question 17: Problem Solving

State the new exposure factor needed to make the change given.An exposure is made using 48mAs and 82kVp. The exposure should be repeated with the mAs increased by 100% and kVp reduced 15%. Round your numbers.

Answer:

96 mAs and 70kVp

Question 18: What effect does kVp have on receptor exposure?

Answer:

direct (increase kVp, increase receptor exposure)

Question 19: Problem Solving

What is the mA?time 1/5 mAs 120

Answer:

600 mA

Question 20: How do you maintain receptor exposure with mAs if SID changes?

Answer:

mAs1 / mAs2 = (SID1)2 divided by (SID2)2; maintains receptor exposure with mAs changes for SID

Question 21: What affects tube current?

Answer:

mA - increasing tube current increases filament current, the quantity of electrons produced at the filament Question 22: True/False; For a given receptor exposure, mA and Time are inversely proportional to each other. Give formula.

Answer:

TRUE; mA(1) / mA(2) = t(2) / t(1)

Question 23: Problem Solving

What is the missing factor?900 mA and 36" to _____mA and 24"

Answer:

400 mA