FREE RADIOLOGY AND STUDY GAMES ABOUT CONTRAST

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FREE RADIOLOGY AND STUDY GAMES ABOUT CONTRAST

FACTORS EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -27 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: A large number of grey densities of varying tonal values is said to possess:

Answer:

Long scale contrast Question 2: Even though mentioned as a factor, why would kVp be a poor choice to control radiographic density?

Answer:

Changes the scale of contrast Question 3: How much must mAs be increased before a noticeable change can be seen with the human eye?

Answer:

30% Question 4: High kVp yields an x-ray beam of:

Answer:

Short wavelength

Question 5: Of the following factors: SID, OID and Focal spot size, which has the greatest affect on density?

Answer:

SID Question 6: When needed, you can decrease you mAs by half, if you increase kVp by:

Answer:

15%

Question 7: Of the factors listed below, the easiest to penetrate is

Fat,Muscle,Gas/Air,Cartilage,Bone

Answer:

Gas/Air

Question 8: What is the controlling factor for subject contrast?

Answer:

kilovoltage Question 9: Of the following statements, which is true? High kVp = High contrast High kVp = Low contrast High kVp = Short scale contrast High kVp = Low density High kVp = Increased patient dose

Answer:

High kVp = Low contrast Question 10: The degree of blackening of an image is dependent on all factors in this list EXCEPT one. Which is not a density factor?

Answer:

mAs, kVp, Focal spot size, Speed of the image receptor ,Photon energy reaching the image receptor Question 11: Density on a radiographic image is:

Answer:

Overall blackness of the image

Question 12: In what way would the air gap technique affect radiographic contrast

Answer:

Increase contrast Question 13: When the mA is changed from 300 to 600, what affect will this have on density?

Answer:

Increase density Question 14: mAs is obtained by:

Answer:

Multiplying the mA by the time Question 15: An addition of a beam restrictor to reduce the field size to 3" would increase:

Answer:

Contrast Question 16: Short scale contrast can be described as:

Answer:

An image with high contrast Question 17: Scatter radiation affecting the radiographic image would be increasing: kVp, Grid ratio,Filtration or mA?

Answer:

kVp Question 18: When detail in radiograph cannot be displayed due to insufficient radiographic

density the radiograph is said to be:

Answer:

Underexposed Question 19: The primary function of mAs is:

Answer:

Regulate density

Question 20: Which of the following sets of factors will produce the highest contrast? 50mA @ 3/4 sec@ 50kVP 100mA@ 1/4 sec@ 70kVp 150mA @ .50 sec @ 80 kVp 200mA @ .70 sec@ 120kVP 200mA @ 3/4 sec @ 120kVP

Answer:

50mA @ 3/4 sec@ 50kVP Question 21: Adjustment of the mA controls the:

Answer:

Quantity of xrays produced Question 22: Long scale contrast can be changed to short scale contrast by:

Answer:

Decreasing the kilovoltage

Question 23: Long wavelength radiation will produce a image with

Answer:

High contrast Question 24: Scatter radiation can destroy the quality of the image. The chief way to control this problem is by decreasing

Answer:

kVp Question 25: Of the following factors, which will have the GREATEST affect on contrast. kVp, mAs, time or SID?

Answer:

kVp

Question 26: Adding 10 kVp to an exposure, would decrease

Answer:

Contrast

Question 27: The Function of contrast on the radiographic image is to

Answer:

Make detail visible