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Test your basic knowledge |
Digital Image Processing
Start Test
Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
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. What are the two most common output devices?
health level 7
byte
ENIAC
monitors and printers
2. In what time period did mathematical theory and solid-state electronics come out?
voxel
central processing unit
analog-to-digital converters
1940s
3. When subject contrast is high - the acquired data contrast will be ____.
high
central processing unit
ROM
voltage
4. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
programs and data
numerical values
hardware
array detection
5. The quality of the data acquired from the IR is measured by what three data characteristics?
10 megabyte
frequency - contrast - and noise
peripherals
write memory
6. Computers operate from ____ ____ language.
Fourier Transformation
binary machine
byte
fine
7. Computer memory is often rated in terms of total ____ memory.
digital computers
high-pass filtering
byte
frequency - contrast - and noise
8. Computer programs are called what?
low
electronic sources
software
little
9. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
decrease
bandwidth
band-pass filtering
10. What is the equation for determining gray scale bit depth?
window
direct
2^x
numerical values
11. Window width and contrast have an ____ relationship.
32
high
detector
inverse
12. 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.
program
binary machine
RAM
window
13. Resolution is controlled by what?
1960s
ROM
digital computers
matrix size
14. Digital detectors are capable of producing ______ shades of gray.
1960s
1000+
CD or DVD
fine
15. What directs information to and from various parts of the computer?
central processing unit
inversely
window level
analog computers
16. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?
analog-to-digital converters
numerical value
progressive scanning
band-pass filtering
17. Changes in window width are sometimes called gray scale ____ or ____.
byte
magnetic tape
peripherals
expansion or compression
18. What is the raw data to which a Fourier Transformation is applied to create the digital image?
filtering
frequency
memory
hardware
19. What is the information stored as magnetic variations referred to as?
raster scan pattern
memory
abacus
ROM
20. A larger matrix provides ____ pixels.
smaller
accentuates or suppresses
on
write memory
21. A low contrast image has a ___ frequency.
monitors and printers
RAM - ROM
low
raster scan pattern
22. What does a 0 in binary code stand for?
raster scan pattern
10 megabyte
ROM
off
23. The human visual range is ___ or fewer shades of gray.
32
expansion or compression
signal-to-noise ratio
accentuates or suppresses
24. What are the two types of information computers use?
peripherals
progressive scanning
programs and data
bus speed
25. What changes the pixel value by multiplication or division and controls image contrast?
IR
central processing unit
window width
smaller
26. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
bus
signal-to-noise ratio
transverse - sagittal - and coronal
numerical value
27. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
numerical value
RAM
bandwidth
expansion or compression
28. The human visual range is ___ or fewer shades of gray.
monitors and printers
digital image
program
32
29. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
data
scanning
voltage
Input devices
30. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
32
filtering
IRs
31. Which type of information consists of collected facts?
data
digital image
computers
direct
32. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
1960s
inverse
direct
33. Which computers handle data composed of definite quantities of current?
CPU - Bus
accentuates or suppresses
digital computers
smaller
34. What is the primary limitation with the resolution on digital images?
reduces
voltage
memory
raster scan pattern
35. What is the name for an 8-bit word?
contrast
byte
ROM
high
36. What 3 things were required prior to digital computer applications in medical imaging?
programs and data
mathematical theory - solid-state electronics - and microchip technology
raster scan pattern
bandwidth
37. What does a 1 in binary code stand for?
0 - 1
on
low-pass - band-pass - and high-pass
little
38. What is the information stored as magnetic variations referred to as?
inverse
numerical values
frequency
memory
39. What is the 'noisiest' component of a digital system?
central processing unit
TV camera
bandwidth
off
40. What modalities are array processors useful for?
decrease
CT and MRI
frequency - contrast - and noise
analog-to-digital converters
41. What provides specific instructions for calculations and sequential steps to be followed?
1970s-1990s
analog computers
software
numerical value
42. There is a ___ relationship between subject contrast and acquired data contrast.
CT and MRI
data
direct
200 - 500-1000
43. What provides specific instructions for calculations and sequential steps to be followed?
array detection
0 - 1
peripherals
software
44. If window width increases - image contrast will ____.
RAM - ROM
200 - 500-1000
2^x
decrease
45. What type of scanning increases resolution but can't be used in real-time dynamic studies?
band-pass filtering
slow scanning
10 megabyte
ROM
46. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
numerical value
low-pass filter
fine
memory
47. When detectors acquire their information by ____ they are receiving info from a specific area.
matrix size
scanning
bus
digital computers
48. Each pixel is capable of representing a wide range of what?
window level
smaller
shades of gray
contrast
49. Modalities differ in bit depth that is available depending on the capabilities of what?
low
little
IR
32
50. Binary systems operate with a ___-symbol language.
high
two
programs and data
digital imaging and communication in medicine