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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.
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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. What does DICOM stand for?
array processors
frequency - contrast - and noise
digital imaging and communication in medicine
fine
2. In what time period did mathematical theory and solid-state electronics come out?
1940s
computers
filtering
contrast
3. When detectors acquire their information by ____ they are receiving info from a specific area.
central processing unit
scanning
progressive scanning
electronic sources
4. What is the name for a binary digit?
bit
reduces
matrix
smoothing
5. The _____ the matrix size - the better the resolution.
1000+
greater
bus speed
noise
6. What does a 1 in binary code stand for?
on
memory
progressive scanning
2^x
7. There is a ___ relationship between subject contrast and acquired data contrast.
shades of gray
CPU - Bus
bus
direct
8. What is the name of the 'modern electronic computer'?
byte
window width
ENIAC
byte
9. Digital detectors are capable of producing ______ shades of gray.
health level 7
1000+
memory
software
10. Computers operate from ____ ____ language.
binary machine
parallel - serial
computer - radiographer
off
11. What is an image that has been converted into numerical values for transmission or processing?
2^x
digital image
noise
write memory
12. Noise is ____ related to contrast.
frequency
inversely
voxel
matrix size
13. Digital detectors are capable of producing ______ shades of gray.
1945
greater
1000+
off
14. What changes the pixel value by multiplication or division and controls image contrast?
window width
software
programs and data
window level
15. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
window
binary machine
accentuates or suppresses
1-2 lp/mm
16. Computer equipment is called what?
2^x
scanning or array detection
hardware
little
17. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
high
health level 7
gray scale bit depth
18. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
number of values displayed per image side
signal-to-noise ratio
decreased
bus
19. Medical imaging is often achieved from information that has been processed by what?
mathematical theory - solid-state electronics - and microchip technology
analog-to-digital converters
byte
computers
20. What can memory be transferred as?
band-pass filtering
ENIAC
10 megabyte
voltage
21. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
pixel size
1970s-1990s
voxel
raster scan pattern
22. What is the random background information that does not contribute to the image quality?
central processing unit
noise
electronic sources
analog-to-digital converters
23. When was ENIAC invented?
1945
two
pixel
greater
24. What are the 3 classifications of digitized image filters?
smaller
bus
low-pass - band-pass - and high-pass
fine
25. 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?
band-pass filtering
numerical values
array detection
raster scan pattern
26. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
matrix size
parallel - serial
scanning or array detection
CT and MRI
27. What is the name of the 'modern electronic computer'?
ENIAC
bandwidth
byte
array detection
28. 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.
programs and data
progressive scanning
window
1970s-1990s
29. Which computers handle data composed of continuously varying electrical currents?
IRs
memory
analog computers
1940s
30. What is the frequency response of the incoming signal called?
low
low
bandwidth
analog-to-digital converters
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?
DICOM standard
greater
window
programs and data
32. Computer memory is often rated in terms of total ____ memory.
bus
ROM
CD or DVD
byte
33. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
CT and MRI
electronic sources
Input devices
analog-to-digital converters
34. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
reduces
matrix
ROM
matrix
35. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
edge enhancement filtering or sharpening
on
high
36. Digitalization of analog information (increases / reduces) the quality and quantity of information?
Fourier Transformation
expansion or compression
reduces
smoothing
37. What are the two most common output devices?
expansion or compression
IRs
scanning or array detection
monitors and printers
38. What is the equation for determining gray scale bit depth?
1000+
software
computers
2^x
39. 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.
filtering
32
pixel
high-pass filtering
40. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?
1-2 lp/mm
number of values displayed per image side
bus
window
41. A larger matrix provides ____ pixels.
array detection
software
write memory
smaller
42. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
1940s
array processors
scanning
abacus
43. What directs information to and from various parts of the computer?
CT and MRI
binary machine
digital imaging and communication in medicine
central processing unit
44. Computer equipment is called what?
hardware
contrast
byte
little
45. What was the earliest computer device called?
RAM
1970s-1990s
abacus
little
46. The number of shades of gray is determined by what?
1945
gray scale bit depth
abacus
IRs
47. The quality of the data acquired from the IR is measured by what three data characteristics?
gray scale bit depth
1940s
read memory
frequency - contrast - and noise
48. What is an individual matrix box or picture element?
pixel
two
high
programs and data
49. Increased noise = _____ image contrast.
signal-to-noise ratio
decreased
ENIAC
smaller
50. What is the information stored as magnetic variations referred to as?
on
memory
smaller
contrast
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