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Test your basic knowledge |
Digital Image Processing
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
analog computers
ENIAC
analog-to-digital converters
bus
2. What are the 3 classifications of digitized image filters?
CD or DVD
low-pass - band-pass - and high-pass
bit
peripherals
3. Increased noise = _____ image contrast.
bus speed
ROM
RAM
decreased
4. A __ _____ disk will store over 10000000 bytes of information.
10 megabyte
bus speed
digital imaging and communication in medicine
inverse
5. Computer equipment is called what?
numerical values
scanning
number of values displayed per image side
hardware
6. What is the primary limitation with the resolution on digital images?
digital imaging and communication in medicine
shades of gray
raster scan pattern
reduces
7. Modalities differ in bit depth that is available depending on the capabilities of what?
digital imaging and communication in medicine
smaller
IR
bus
8. Computer programs are called what?
band-pass filtering
software
monitors and printers
read memory
9. What modalities are array processors useful for?
smaller
array detection
CT and MRI
byte
10. What is the frequency response of the incoming signal called?
pixel
bandwidth
inverse
number of values displayed per image side
11. What type of memory storage devices are required for large amounts of data?
CT and MRI
two
CD or DVD
high
12. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
analog-to-digital converters
magnetic tape
decreased
parallel - serial
13. A __ _____ disk will store over 10000000 bytes of information.
slow scanning
TV camera
10 megabyte
RAM
14. The human visual range is ___ or fewer shades of gray.
RAM - ROM
peripherals
greater
32
15. Computer programs are called what?
contrast
software
read memory
array detection
16. Which memory can only be extracted without alteration; cannot change?
read memory
bandwidth
CT and MRI
1-2 lp/mm
17. Which type of information consists of operating instructions?
transverse - sagittal - and coronal
program
hardware
CT and MRI
18. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
memory
fine
inversely
raster scan pattern
19. In what time period did mathematical theory and solid-state electronics come out?
off
1940s
32
central processing unit
20. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
window width
raster scan pattern
high-pass filtering
RAM - ROM
21. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
large amount
band-pass filtering
1940s
22. What is the random background information that does not contribute to the image quality?
noise
write memory
direct
DICOM standard
23. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
hardware
transverse - sagittal - and coronal
CD or DVD
numerical values
24. What are devices that process information?
ENIAC
computers
DICOM standard
frequency
25. What are the two most common output devices?
0 - 1
decrease
monitors and printers
gray scale bit depth
26. Which memory replaces new information with the old; can change?
write memory
Fourier Transformation
on
number of values displayed per image side
27. What is the name of the 'modern electronic computer'?
decreased
matrix
ENIAC
RAM
28. What is the frequency response of the incoming signal called?
bandwidth
large amount
software
ENIAC
29. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
fine
1940s
IRs
30. Who or What is responsible for density changes on a digital image? On a manual image
read memory
expansion or compression
CPU - Bus
computer - radiographer
31. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
smaller
on
RAM
voxel
32. Computer memory is often rated in terms of total ____ memory.
TV camera
byte
high
frequency - contrast - and noise
33. Noise is measured as what?
gray scale bit depth
low-pass - band-pass - and high-pass
signal-to-noise ratio
Input devices
34. What is the 'noisiest' component of a digital system?
window level
expansion or compression
TV camera
numerical values
35. What are devices that process information?
computer - radiographer
data
computers
slow scanning
36. What is the information stored as magnetic variations referred to as?
inversely
memory
little
two
37. Binary systems operate with a ___-symbol language.
32
CD or DVD
1970s-1990s
two
38. In what time period did mathematical theory and solid-state electronics come out?
off
analog-to-digital converters
1940s
band-pass filtering
39. Computerized digital images are described in terms of what
number of values displayed per image side
scanning
central processing unit
software
40. Which memory replaces new information with the old; can change?
write memory
array processors
window width
1970s-1990s
41. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.
window
high
digital image
bus
42. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.
health level 7
0 - 1
window level
two
43. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
analog-to-digital converters
little
low-pass filter
byte
44. What are the two most common output devices?
peripherals
greater
monitors and printers
window
45. Window width and contrast have an ____ relationship.
peripherals
inverse
IRs
scanning or array detection
46. What is required for collection of input information?
computer - radiographer
progressive scanning
detector
Input devices
47. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
slow scanning
direct
1940s
48. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
analog-to-digital converters
parallel - serial
peripherals
CPU - Bus
49. What is the information stored as magnetic variations referred to as?
programs and data
peripherals
transverse - sagittal - and coronal
memory
50. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
number of values displayed per image side
frequency
progressive scanning
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