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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 is the frequency response of the incoming signal called?
read memory
expansion or compression
bandwidth
bus speed
2. What are the 3 classifications of digitized image filters?
increase
window width
low-pass - band-pass - and high-pass
bus speed
3. Noise is ____ related to contrast.
hardware
bus
noise
inversely
4. 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?
matrix
1945
scanning
band-pass filtering
5. Which memory can only be extracted without alteration; cannot change?
analog computers
matrix size
read memory
inversely
6. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
digital imaging and communication in medicine
CD or DVD
filtering
electronic sources
7. Around what time did digital computerization come out for CT and US?
1970s-1990s
program
IR
bus speed
8. The _____ the matrix size - the better the resolution.
1-2 lp/mm
greater
inverse
RAM
9. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
electronic sources
numerical values
bus
1-2 lp/mm
10. What is a square series of boxes that gives form to the image?
digital image
matrix
high
fine
11. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
central processing unit
IRs
scanning
12. Modalities differ in bit depth that is available depending on the capabilities of what?
health level 7
IR
write memory
digital image
13. What is the name for an 8-bit word?
electronic sources
smaller
numerical value
byte
14. Which type of information consists of operating instructions?
CD or DVD
byte
program
frequency - contrast - and noise
15. What is the primary limitation with the resolution on digital images?
raster scan pattern
contrast
mathematical theory - solid-state electronics - and microchip technology
byte
16. What are the two ways detectors acquire information?
scanning or array detection
DICOM standard
IR
slow scanning
17. What is the name for a binary digit?
hardware
1940s
1000+
bit
18. In what time period did microchip technology come out?
electronic sources
read memory
decreased
1960s
19. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
low-pass - band-pass - and high-pass
byte
data
20. Resolution is controlled by what?
Fourier Transformation
bus speed
frequency - contrast - and noise
matrix size
21. Which computers handle data composed of continuously varying electrical currents?
analog computers
frequency
analog-to-digital converters
monitors and printers
22. When detectors acquire their information through ____ they are receiving all the info at once.
data
array detection
programs and data
low
23. Noise is measured as what?
signal-to-noise ratio
200 - 500-1000
noise
binary machine
24. Which type of information consists of collected facts?
abacus
1940s
data
1970s-1990s
25. Digital detectors are capable of producing ______ shades of gray.
1000+
filtering
window width
two
26. What 3 things were required prior to digital computer applications in medical imaging?
on
CT and MRI
mathematical theory - solid-state electronics - and microchip technology
peripherals
27. Medical imaging is often achieved from information that has been processed by what?
signal-to-noise ratio
scanning
pixel
analog-to-digital converters
28. Binary systems operate with a ___-symbol language.
data
two
raster scan pattern
signal-to-noise ratio
29. In what time period did mathematical theory and solid-state electronics come out?
IR
smoothing
1940s
10 megabyte
30. The computer either ____ or ____ selected frequencies during the filtering process.
window level
slow scanning
accentuates or suppresses
digital computers
31. What type of scanning increases resolution slightly by scanning all 525 lines in order?
Fourier Transformation
numerical values
progressive scanning
inversely
32. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
digital image
binary machine
large amount
low-pass filter
33. What provides specific instructions for calculations and sequential steps to be followed?
bus
software
data
central processing unit
34. What does a 1 in binary code stand for?
on
1970s-1990s
array detection
greater
35. What is the equation for determining gray scale bit depth?
1940s
ROM
data
2^x
36. Digital detectors are capable of producing ______ shades of gray.
byte
low
progressive scanning
1000+
37. What is critical to how fast the computer system can function?
TV camera
10 megabyte
1960s
bus speed
38. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
electronic sources
array detection
slow scanning
magnetic tape
39. What is a square series of boxes that gives form to the image?
fine
matrix
hardware
computers
40. When detectors acquire their information through ____ they are receiving all the info at once.
numerical value
bit
array detection
DICOM standard
41. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
write memory
array processors
fine
TV camera
42. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
read memory
memory
RAM - ROM
data
43. What can memory be transferred as?
voltage
frequency - contrast - and noise
bus
mathematical theory - solid-state electronics - and microchip technology
44. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
edge enhancement filtering or sharpening
parallel - serial
low-pass filter
1945
45. Fluoroscopic noise mostly comes from what?
electronic sources
voltage
200 - 500-1000
computer - radiographer
46. What are the two ways detectors acquire information?
frequency - contrast - and noise
scanning or array detection
bandwidth
health level 7
47. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
parallel - serial
increase
bus
bandwidth
48. When was ENIAC invented?
programs and data
1945
signal-to-noise ratio
binary machine
49. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.
binary machine
expansion or compression
electronic sources
0 - 1
50. What is the 'noisiest' component of a digital system?
software
bit
TV camera
CD or DVD