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Test your basic knowledge |
Digital Image Processing
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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. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
pixel
read memory
central processing unit
2. Computers operate from ____ ____ language.
inversely
binary machine
memory
electronic sources
3. 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.
ROM
accentuates or suppresses
high-pass filtering
software
4. What modalities are array processors useful for?
band-pass filtering
CT and MRI
peripherals
high-pass filtering
5. If window width increases - image contrast will ____.
greater
pixel
decrease
progressive scanning
6. If the window level increases - density will _____.
increase
accentuates or suppresses
ENIAC
write memory
7. What are the two most common output devices?
monitors and printers
mathematical theory - solid-state electronics - and microchip technology
digital imaging and communication in medicine
increase
8. What is the raw data to which a Fourier Transformation is applied to create the digital image?
matrix
frequency
CT and MRI
bandwidth
9. What permit input/output of information to or from the CPU?
peripherals
smoothing
low-pass filter
analog-to-digital converters
10. In what time period did mathematical theory and solid-state electronics come out?
voxel
abacus
edge enhancement filtering or sharpening
1940s
11. What type of scanning increases resolution but can't be used in real-time dynamic studies?
hardware
IR
digital imaging and communication in medicine
slow scanning
12. What are the 3 classifications of digitized image filters?
CD or DVD
low-pass - band-pass - and high-pass
mathematical theory - solid-state electronics - and microchip technology
2^x
13. What is an image that has been converted into numerical values for transmission or processing?
software
digital image
off
smoothing
14. What is the random background information that does not contribute to the image quality?
read memory
noise
frequency - contrast - and noise
window level
15. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
central processing unit
numerical values
frequency - contrast - and noise
write memory
16. A high contrast image has a ___ frequency.
high
Input devices
low
byte
17. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
slow scanning
voxel
low-pass filter
IR
18. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
scanning or array detection
1000+
on
200 - 500-1000
19. Digital detectors are capable of producing ______ shades of gray.
direct
IR
1000+
analog computers
20. The ____ is the heart of the computer while the ___ is the vessels.
bandwidth
number of values displayed per image side
bus speed
CPU - Bus
21. Which memory replaces new information with the old; can change?
number of values displayed per image side
1945
digital imaging and communication in medicine
write memory
22. What is the raw data to which a Fourier Transformation is applied to create the digital image?
analog-to-digital converters
frequency
Fourier Transformation
analog computers
23. What are devices that process information?
computers
transverse - sagittal - and coronal
shades of gray
window level
24. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
2^x
voltage
low
25. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
matrix
fine
peripherals
pixel size
26. There is a ___ relationship between subject contrast and acquired data contrast.
signal-to-noise ratio
read memory
progressive scanning
direct
27. The quality of the data acquired from the IR is measured by what three data characteristics?
slow scanning
ENIAC
frequency - contrast - and noise
slow scanning
28. Around what time did digital computerization come out for CT and US?
1970s-1990s
high-pass filtering
hardware
health level 7
29. What is the primary limitation with the resolution on digital images?
accentuates or suppresses
bus speed
matrix size
raster scan pattern
30. What is the name for a binary digit?
array processors
10 megabyte
window width
bit
31. What is the frequency response of the incoming signal called?
low
bandwidth
hardware
magnetic tape
32. What is critical to how fast the computer system can function?
progressive scanning
read memory
bus speed
scanning or array detection
33. Which memory replaces new information with the old; can change?
peripherals
write memory
bus speed
bus
34. What was the earliest computer device called?
off
central processing unit
abacus
IR
35. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
window width
peripherals
ENIAC
0 - 1
36. What 3 things were required prior to digital computer applications in medical imaging?
array processors
mathematical theory - solid-state electronics - and microchip technology
software
analog computers
37. Modalities differ in bit depth that is available depending on the capabilities of what?
detector
bus
large amount
IR
38. What is the mathematical algorithm used to create all medical images?
Input devices
Fourier Transformation
pixel size
low
39. What is the name for an 8-bit word?
magnetic tape
byte
digital computers
numerical values
40. What are devices that process information?
edge enhancement filtering or sharpening
two
computers
health level 7
41. Window width and contrast have an ____ relationship.
voltage
peripherals
inverse
analog computers
42. Binary systems operate with a ___-symbol language.
mathematical theory - solid-state electronics - and microchip technology
gray scale bit depth
10 megabyte
two
43. 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
bus
analog-to-digital converters
byte
44. Computer programs are called what?
2^x
TV camera
low-pass - band-pass - and high-pass
software
45. Noise is ____ related to contrast.
high
inversely
0 - 1
low-pass - band-pass - and high-pass
46. Who or What is responsible for density changes on a digital image? On a manual image
digital image
frequency
2^x
computer - radiographer
47. What changes the pixel value by multiplication or division and controls image contrast?
array processors
window width
scanning or array detection
numerical value
48. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
frequency
ROM
parallel - serial
central processing unit
49. If window width increases - image contrast will ____.
CT and MRI
parallel - serial
decrease
frequency
50. The quality of the data acquired from the IR is measured by what three data characteristics?
1970s-1990s
numerical values
byte
frequency - contrast - and noise
Can you answer 50 questions in 15 minutes?
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