Physics questions 6
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MPHY501HomeworkLecture8.docxHomework
MPHY 501 Part 1 Lecture 8 Ch 9
Fluoroscopy
1. What is the principal use of fluoroscopy?
a. For taking x-rays
b. Interventional procedures
c. Checking for fluorophores
2. How has fluoroscopy changed since the early years?
3. What is the frame rate used in fluoroscopy?
4. What delivers more dose Pulsed or continuous mode Fluoroscopy?
5. How is a collimator in fluoroscopy like a Positive Beam Limiter (PBL) in screen film radiography?
6. Why is x-ray tube under table?
7. What is KAP meter?
8. What kind of filters are used?
9. What is the purpose of an equalization filter?
10. How does the dose in the four modes of fluoroscopy change per mode?
11. How does binning the dexel help or hurt
a. signal to noise
b. resolution
12. Describe how an AERC works and how it knows how to change settings.
13. Do patients receive more or less dose in magnification mode? Explain at least one exception to this rule?
14. What happens to dose if we go from a 23 cm FOV to a 17 FOV magnification?
15. How does frame averaging:
a. Help image quality
b. Hurt image quality
16. How does one test for contrast resolution?
a. What special equipment is used?
b. How is the measurement made?
17. If I increase the mAs by a factor of 9 how does the signal to noise increase in temporal resolution?
18. Can the human eye note a lag of 100 milliseconds?
19. List all the dose reduction methods to the patient in fluoroscopy
20. List all the dose reduction methods for fluoroscopy workers
21. How is EDE 1 determined
22. How is EDE 2 determined
