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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. 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?
bus speed
monitors and printers
band-pass filtering
byte
2. What is the 'heart' of every computer?
parallel - serial
raster scan pattern
central processing unit
1940s
3. What are the two ways detectors acquire information?
bandwidth
direct
scanning or array detection
digital computers
4. Which memory replaces new information with the old; can change?
transverse - sagittal - and coronal
array processors
digital image
write memory
5. Window width and contrast have an ____ relationship.
inverse
voxel
binary machine
DICOM standard
6. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
window
signal-to-noise ratio
signal-to-noise ratio
7. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
Fourier Transformation
parallel - serial
frequency
1960s
8. Which type of information consists of collected facts?
increase
gray scale bit depth
digital imaging and communication in medicine
data
9. What are the two types of information computers use?
contrast
off
pixel size
programs and data
10. Digital detectors are capable of producing ______ shades of gray.
bus speed
little
high-pass filtering
1000+
11. What modalities are array processors useful for?
CT and MRI
1940s
detector
gray scale bit depth
12. Digitalization of analog information (increases / reduces) the quality and quantity of information?
DICOM standard
analog-to-digital converters
inversely
reduces
13. What does DICOM stand for?
matrix size
expansion or compression
gray scale bit depth
digital imaging and communication in medicine
14. What is the name for an 8-bit word?
digital computers
byte
high
voltage
15. All medical imaging is achieved with which type of computers?
expansion or compression
detector
digital computers
decrease
16. What does a 0 in binary code stand for?
programs and data
off
array processors
two
17. 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
progressive scanning
byte
transverse - sagittal - and coronal
18. Digital detectors are capable of producing ______ shades of gray.
parallel - serial
signal-to-noise ratio
digital computers
1000+
19. What is the frequency response of the incoming signal called?
bandwidth
2^x
inverse
peripherals
20. What directs information to and from various parts of the computer?
ENIAC
central processing unit
electronic sources
software
21. Computer memory is often rated in terms of total ____ memory.
analog-to-digital converters
frequency
byte
0 - 1
22. Changes in window width are sometimes called gray scale ____ or ____.
CPU - Bus
array processors
expansion or compression
programs and data
23. If window width increases - image contrast will ____.
high
decrease
data
direct
24. Increased noise = _____ image contrast.
accentuates or suppresses
bandwidth
10 megabyte
decreased
25. Who or What is responsible for density changes on a digital image? On a manual image
window width
computer - radiographer
decrease
10 megabyte
26. 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?
inverse
large amount
RAM - ROM
transverse - sagittal - and coronal
27. If window width increases - image contrast will ____.
central processing unit
byte
decrease
bit
28. What is the name of the 'modern electronic computer'?
low
peripherals
health level 7
ENIAC
29. What is critical to how fast the computer system can function?
byte
IRs
bus speed
peripherals
30. What are the 3 classifications of digitized image filters?
direct
low-pass - band-pass - and high-pass
bit
IR
31. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
pixel size
software
Input devices
raster scan pattern
32. What are the two most common output devices?
1945
monitors and printers
decreased
DICOM standard
33. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
software
central processing unit
array processors
Input devices
34. Fluoroscopic noise mostly comes from what?
low-pass - band-pass - and high-pass
electronic sources
CD or DVD
digital imaging and communication in medicine
35. Which computers handle data composed of definite quantities of current?
increase
IR
digital computers
write memory
36. What type of scanning increases resolution but can't be used in real-time dynamic studies?
shades of gray
progressive scanning
slow scanning
bus speed
37. Each pixel is capable of representing a wide range of what?
expansion or compression
shades of gray
IR
ENIAC
38. Which memory replaces new information with the old; can change?
write memory
off
accentuates or suppresses
analog computers
39. Noise is ____ related to contrast.
smaller
inversely
computer - radiographer
transverse - sagittal - and coronal
40. What are the 3 classifications of digitized image filters?
matrix size
bus
peripherals
low-pass - band-pass - and high-pass
41. What are devices that process information?
programs and data
high
CT and MRI
computers
42. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
low-pass - band-pass - and high-pass
1-2 lp/mm
bandwidth
number of values displayed per image side
43. What changes the pixel value by multiplication or division and controls image contrast?
RAM - ROM
software
central processing unit
window width
44. Binary systems operate with a ___-symbol language.
large amount
two
Fourier Transformation
smaller
45. Noise is ____ related to contrast.
Fourier Transformation
high
health level 7
inversely
46. What is the name for a binary digit?
bit
matrix size
greater
parallel - serial
47. Which memory can only be extracted without alteration; cannot change?
read memory
number of values displayed per image side
two
off
48. Binary systems operate with a ___-symbol language.
Input devices
1940s
two
scanning
49. What provides specific instructions for calculations and sequential steps to be followed?
memory
digital imaging and communication in medicine
2^x
software
50. Around what time did digital computerization come out for CT and US?
progressive scanning
bandwidth
1970s-1990s
greater