EXAM COMPLETE QUESTIONS AND CORRECT DETAILED
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1. An image that demonstrates low contrast can be caused from?
1. High mAs
2. Low kVp
3. Insufficient beam restriction Ans >> 3 only
2. Which of the following interactions with matter reduce contrast in an x-ray
image? Ans >> Compton scattering
3. From anatomical position, pronating the hand will result in the palm facing
. Ans >> Posteriorly
4. The maximum variation between consecutive exposures when using the
same technical factor is Ans >> Ans >> within 5%
5. An atom containing three protons and three neutrons in its nucleus has a
(an) Ans >> Ans >> atomic number of 3
6. What term is applied to the level of medical asepsis that involves the
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, destruction of pathogens by using chemical materials? Ans >>
Disinfection
7. Why is it important for a patient to have their knees flexed for an AP
projection of the lumbar spine? Ans >> to reduce the lordotic curvature of the
lumbar spine and open up the joint spaces
8. Which of the following is an accepted standard for networking medical
devices to exchange images and information regardless of the brand of equip-
ment? Ans >> DICOM
9. The portion of the image intensifier device that is responsible for converting
light photons into free electrons is the Ans >> Ans >> photocathode
10. With increasing levels of beam filtration where will the greatest dose
savings be realized? Ans >> In the initial layers of tissue struck by the beam
11. What kind of fracture is this? Ans >> compound
12. With all other technical factors remaining constant, what effect(s) will
increasing amounts of filtration have on the X-ray beam? 1. decrease patient
skin exposure 2. decrease the measurement of the shortest wavelength pre-
sent within the beam
3. harden the X-ray beam
4. increase the percentage of beam penetration through the objects of inter-
est Ans >> 1, 3, and 4 only
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, 13. Which of the following anatomic structures is best demonstrated in the
LAO position while performing a BE? Ans >> Splenic flexure
14. A bit depth of 9 will result in how many shades of gray? Ans >> 512 (2^9)
15. The bucky slot cover of a fluoroscopic unit must provide a minimum lead
equivalent absorption equal to mm of lead. Ans >> .25 mm
16. What should be the technologist's first response upon discovering a fire
has broken out in a patient holding area? Ans >> evacuate any patients from
the area
17. The central ray is directed to a point 5 cm (2") distal to the when
performing an AP projection of the scapula. Ans >> Coracoid process
18. A decrease in beam filtration will have what effect on radiographic image
contrast? Ans >> contrast will increase
19. The greatest spatial resolution will be seen with which of the following
image matrix sizes? Ans >> 2048x2048
20. A threshold dose-response relationship is seen in which of the following
types of radiation-induced cancers? Ans >> skin
21. Why is limiting the maximum kilovoltage of the useful X-ray beam impor-
tant when performing exams employing an iodinated contrast media? Ans >>
exces- sive kilovoltage reduces the ability of the iodinated contrast media to
attenuate the useful X-ray beam
22. Antiversion of the femoral neck is overcome by a when performing
an AP projection of the pelvis. Ans >> 15 to 20 degrees internal rotation of the
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