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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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study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
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. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
raster scan pattern
data
digital computers
2. Noise is ____ related to contrast.
1000+
inversely
decrease
hardware
3. Noise is ____ related to contrast.
inversely
array processors
ENIAC
binary machine
4. Computer equipment is called what?
abacus
computer - radiographer
expansion or compression
hardware
5. What type of scanning increases resolution slightly by scanning all 525 lines in order?
smoothing
progressive scanning
ROM
inverse
6. When was ENIAC invented?
pixel size
high
array processors
1945
7. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
matrix
0 - 1
numerical values
ROM
8. A __ _____ disk will store over 10000000 bytes of information.
10 megabyte
1960s
bus speed
magnetic tape
9. The computer either ____ or ____ selected frequencies during the filtering process.
numerical value
pixel size
10 megabyte
accentuates or suppresses
10. What is the frequency response of the incoming signal called?
bus speed
monitors and printers
parallel - serial
bandwidth
11. 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
byte
high
1-2 lp/mm
12. Fluoroscopic noise mostly comes from what?
electronic sources
off
high
scanning or array detection
13. Noise is measured as what?
numerical value
signal-to-noise ratio
scanning or array detection
1970s-1990s
14. What input device do radiographers use on a normal basis?
slow scanning
1960s
IRs
raster scan pattern
15. In what time period did mathematical theory and solid-state electronics come out?
read memory
1940s
expansion or compression
expansion or compression
16. What is the name for an 8-bit word?
frequency - contrast - and noise
byte
gray scale bit depth
smoothing
17. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
programs and data
inversely
32
18. Computerized digital images are described in terms of what
scanning or array detection
progressive scanning
bit
number of values displayed per image side
19. What is the name for a binary digit?
1970s-1990s
bit
32
numerical values
20. What is the primary limitation with the resolution on digital images?
2^x
raster scan pattern
decreased
bus
21. Which type of information consists of operating instructions?
mathematical theory - solid-state electronics - and microchip technology
software
little
program
22. The ____ is the heart of the computer while the ___ is the vessels.
reduces
low-pass - band-pass - and high-pass
CPU - Bus
progressive scanning
23. What are the 3 classifications of digitized image filters?
transverse - sagittal - and coronal
computer - radiographer
low-pass - band-pass - and high-pass
parallel - serial
24. What changes the pixel value by multiplication or division and controls image contrast?
low
TV camera
CT and MRI
window width
25. Which computers handle data composed of continuously varying electrical currents?
little
analog computers
gray scale bit depth
high
26. The computer either ____ or ____ selected frequencies during the filtering process.
digital imaging and communication in medicine
bus
accentuates or suppresses
programs and data
27. The number of shades of gray is determined by what?
DICOM standard
gray scale bit depth
software
window
28. What 3 things were required prior to digital computer applications in medical imaging?
decreased
high-pass filtering
mathematical theory - solid-state electronics - and microchip technology
window
29. What was the earliest computer device called?
abacus
programs and data
transverse - sagittal - and coronal
number of values displayed per image side
30. What is critical to how fast the computer system can function?
bus speed
10 megabyte
high
computers
31. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?
frequency - contrast - and noise
pixel size
1945
DICOM standard
32. Computer memory is often rated in terms of total ____ memory.
numerical value
band-pass filtering
byte
two
33. What are the two ways detectors acquire information?
CD or DVD
parallel - serial
scanning or array detection
noise
34. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
IR
number of values displayed per image side
peripherals
35. Computers operate from ____ ____ language.
peripherals
1000+
on
binary machine
36. Resolution is controlled by what?
bus
1000+
magnetic tape
matrix size
37. What directs information to and from various parts of the computer?
write memory
health level 7
1960s
central processing unit
38. What is an image that has been converted into numerical values for transmission or processing?
digital computers
abacus
1960s
digital image
39. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
number of values displayed per image side
byte
on
40. Which computers handle data composed of continuously varying electrical currents?
peripherals
1940s
analog computers
bus
41. What can memory be transferred as?
2^x
array processors
voltage
smoothing
42. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
low-pass filter
binary machine
parallel - serial
write memory
43. What directs information to and from various parts of the computer?
pixel
central processing unit
low-pass filter
electronic sources
44. What type of memory storage devices are required for large amounts of data?
ENIAC
CD or DVD
accentuates or suppresses
Input devices
45. A larger matrix provides ____ pixels.
numerical value
bandwidth
smaller
raster scan pattern
46. Which memory can only be extracted without alteration; cannot change?
smaller
1000+
read memory
inverse
47. If the window level increases - density will _____.
window
increase
CT and MRI
progressive scanning
48. What input device do radiographers use on a normal basis?
byte
frequency - contrast - and noise
IRs
array detection
49. The ____ is the heart of the computer while the ___ is the vessels.
band-pass filtering
RAM - ROM
CPU - Bus
bandwidth
50. In what time period did microchip technology come out?
matrix size
RAM - ROM
1960s
parallel - serial
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