FREE RADIOLOGY AND STUDY GAMES ABOUT RADT 456

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FREE RADIOLOGY AND STUDY GAMES ABOUT RADT 456

UNIT 3 EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -30 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: 16. What test is performed to check the correctness of the developing parameters?

Answer:

sensitometry Question 2: 15. What device is used to overcome severe variation in patient anatomy or tissue density, providing more uniform radiographic density?

Answer:

compensating filter

Question 3: 22. What is a focal-spot size of 0.3mm or smaller essential for?

Answer:

magnification radiography Question 4: 29. What term is used to describe unsharp edges of tiny radiographic details?

Answer:

blurr

Question 5: 26. What happens to the image when a slow screen-film system is used with a fast screen-film AEC system?

Answer:

the images are too light Question 6: 23. What is the device that is used to give film emulsion a predetermined exposure in order to test its response to processing called?

Answer:

sensitometer

Question 7: 25. What material is film base currently made of?

Answer:

polyester

Question 8: 3. The term windowing describes the practice of _____

Answer:

changing the image contrast and / or density

Question 9: 20. What is a wire-mesh test performed to evaluate?

Answer:

screen contact Question 10: 5. What is the purpose of the automatic processor's transport system?

Answer:

move the film and change its direction Question 11: 24. What is the relationship between the height of a grid's lead strips and the distance between them referred to?

Answer:

grid ratio Question 12: 2. What is the component of a CR image plate that records the radiologic image?

Answer:

photostimulable phosphor

Question 13: 19. What can be used to determine the sensitivity of a particular film emulsion?

Answer:

sensitometric curve

Question 14: 18. What will result if developer replenishment is inadequate?

Answer:

images with excessively low contrast

Question 15: 8. Using a short SID with a large IR is likely to____

Answer:

increase the anode heel effect

Question 16: 6. What causes crescent-shaped artifacts on processed x-ray film?

Answer:

acute bending of the film before or after exposure Question 17: 21. What accessory is used to measure the thickness of body parts in order to determine optimal selection of exposure factors?

Answer:

caliper Question 18: 17. What is the purpose of the thin layer of lead that is often located behind the rear intensifying screen in an IR?

Answer:

prevent scattered radiation fog Question 19: 30. What chemical is used in the production of radiographic film emulsion?

Answer:

silver halide Question 20: 27. What effect will a stained intensifying screen have on the finished radiograph?

Answer:

decreased density

Question 21: 12. When is focal-spot blur at its greatest?

Answer:

toward the cathode end of the x-ray beam Question 22: 10. How can you improve spatial resolution but still use the same FOV?

Answer:

use a larger matrix

Question 23: 14. What is the density of an unexposed and processed film?

Answer:

0.1

Question 24: 7. Misalignment of the tube-part-IR relationship results in______

Answer:

shape distortion

Question 25: 4. What can foreshortening be caused by?

Answer:

the radiographic object being placed at an angle to the IR Question 26: 28. What will boxes of film stored in a too warm an area be subject to?

Answer:

film fog

Question 27: 11. What is the absorption of useful radiation by a grid called?

Answer:

grid cutoff

Question 28: 1. During film-screen imaging, when is the manifest image formed?

Answer:

in the developer solution