Physics questions 3

MOHY 501

Homework Lecture 3

“Medical Imaging Informatics”

Use the class book or notes to answer.

1. What is the binary number 1101 in base 10”

2. How many volts is a TTL pulse?

3. Describe Big Endian and Little Endian give examples

4. What is a sign bit?

5. Can digital voltages represent a continuous wave form? Discuss why or why not.

6. What is: .11111111 (binary) X 2 01001111 (binary)

7. How is Unicode different than ASCII

8. What does ASCII stand for

9. What are the pros of digital formats for transmission

10. What are the cons of analogue formats for transmission

11. What is dwell time? Give a formula for Dwell time.

12. Is amplitude preserved in digital quantized sampling?

13. Write the formula that relates dwell time to bandwidth.

14. How much storage is required to store 28 images that have a 16bit depth a field of view of 25cmX25cm and a matrix size of 256pixles X 256pixels?

15. What does TCPIP stand for

16. What AAPM task group deals with modality display monitors

17. Define luminance and give SI units for Luminance

18. What is the dynamic range of a monitor, give two mathematical definitions

19. What is the minimum max luminance required for a Mammography Primary display monitor?

20. Define Black Level

21. Define contrast ratio in terms of black level (use an equation and label all terms)

22. Define JND

23. Define Threshold Contrast use an equation and label all terms.

24. How would you calculate your maximum viewing distance, give a mathematical example.

25. What is GSDF?

26. What is a presentation value with GSDF and what is the goal of doing this?

27. Describe how to use this image:

28. What is this equation: J = jmin + p (jmax – jmin)/pmax define each term and where the data comes from for each term in this equation.and how you would get the data for each term in this equation.

29. Why are fiberoptic cables so useful?

30. What is a “Packet”

31. Does every network interface have a network address?

32. What is an “internet protocol” used for?

33. What is a link?

34. In TCP/IP what is layer 3?

35. Name two Layer 4 functions of the sending computer

36. Name four layer 4 functions for the receiving computer

37. What is ivP6, do you think that it will be used or even needed in the future, why or why not?

38. What does SMPT stand for?

39. What is a picture archiving system’s responsibilities?

40. Define HL7

41. Define IHE

42. How much storage does a cardio-catheterization fluoroscopy unit need

43. Is it legal to use lossy compression in mammography?

44. What is the maximum room illuminance for a radiological reading room. What are the correct units to measure this in?

45. What is a hanging protocol?

46. Name three PACS quality control parameters

47. Define HIPAA

48. Where can one find the rules and regulations for HIPAA

49. Name the 4 goals of HIPAA

50. Define a PACS security plan that a medical physicist should require.