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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 information stored as magnetic variations referred to as?
1940s
memory
array detection
array processors
2. What is an individual matrix box or picture element?
write memory
pixel
gray scale bit depth
RAM
3. Which computers handle data composed of continuously varying electrical currents?
numerical values
band-pass filtering
ROM
analog computers
4. What modalities are array processors useful for?
CT and MRI
read memory
data
low-pass filter
5. What modalities are array processors useful for?
read memory
CT and MRI
computer - radiographer
IRs
6. What permit input/output of information to or from the CPU?
little
peripherals
software
health level 7
7. A high contrast image has a ___ frequency.
mathematical theory - solid-state electronics - and microchip technology
electronic sources
high
scanning or array detection
8. What is the random background information that does not contribute to the image quality?
analog-to-digital converters
noise
reduces
shades of gray
9. What is the 'heart' of every computer?
program
magnetic tape
central processing unit
32
10. A __ _____ disk will store over 10000000 bytes of information.
raster scan pattern
10 megabyte
Fourier Transformation
inversely
11. Which type of information consists of collected facts?
accentuates or suppresses
high
data
bus speed
12. What is critical to how fast the computer system can function?
inversely
RAM - ROM
bus speed
transverse - sagittal - and coronal
13. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
edge enhancement filtering or sharpening
bus
digital computers
signal-to-noise ratio
14. Digital detectors are capable of producing ______ shades of gray.
gray scale bit depth
bus
reduces
1000+
15. Which memory replaces new information with the old; can change?
voxel
write memory
slow scanning
byte
16. In what time period did microchip technology come out?
TV camera
bus speed
1960s
CT and MRI
17. What determines resolution?
slow scanning
read memory
analog-to-digital converters
pixel size
18. Resolution is controlled by what?
two
accentuates or suppresses
matrix size
high
19. What is high-pass filtering also called?
large amount
edge enhancement filtering or sharpening
read memory
32
20. All medical imaging is achieved with which type of computers?
abacus
scanning
analog-to-digital converters
digital computers
21. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?
programs and data
health level 7
contrast
matrix
22. Changes in window width are sometimes called gray scale ____ or ____.
computer - radiographer
expansion or compression
array processors
matrix size
23. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
Fourier Transformation
IRs
progressive scanning
large amount
24. The computer either ____ or ____ selected frequencies during the filtering process.
little
off
accentuates or suppresses
software
25. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
off
write memory
1945
Input devices
26. 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?
binary machine
numerical value
bus
200 - 500-1000
27. 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?
pixel size
RAM
number of values displayed per image side
DICOM standard
28. 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.
RAM
electronic sources
read memory
0 - 1
29. A high contrast image has a ___ frequency.
high
noise
bandwidth
bus
30. What permit input/output of information to or from the CPU?
peripherals
byte
1-2 lp/mm
digital computers
31. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
edge enhancement filtering or sharpening
detector
raster scan pattern
fine
32. Computer equipment is called what?
1940s
scanning or array detection
hardware
analog-to-digital converters
33. What is the primary limitation with the resolution on digital images?
abacus
raster scan pattern
window width
reduces
34. What type of scanning increases resolution slightly by scanning all 525 lines in order?
little
greater
progressive scanning
high
35. What does a 0 in binary code stand for?
1945
noise
off
program
36. What are devices that process information?
scanning or array detection
computers
low-pass filter
magnetic tape
37. What can memory be transferred as?
voltage
analog-to-digital converters
slow scanning
greater
38. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
slow scanning
raster scan pattern
numerical values
voxel
39. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
read memory
RAM - ROM
computer - radiographer
smoothing
40. What is the frequency response of the incoming signal called?
inverse
memory
analog computers
bandwidth
41. Computer memory is often rated in terms of total ____ memory.
digital image
ENIAC
digital computers
byte
42. Binary systems operate with a ___-symbol language.
two
1945
greater
low
43. What 3 things were required prior to digital computer applications in medical imaging?
peripherals
IRs
mathematical theory - solid-state electronics - and microchip technology
low-pass - band-pass - and high-pass
44. Digital detectors are capable of producing ______ shades of gray.
bus
two
two
1000+
45. Each pixel is capable of representing a wide range of what?
200 - 500-1000
shades of gray
voxel
1940s
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.
byte
low-pass filter
increase
bus
47. What type of scanning increases resolution but can't be used in real-time dynamic studies?
bandwidth
slow scanning
0 - 1
matrix
48. Noise is ____ related to contrast.
200 - 500-1000
inversely
CD or DVD
digital image
49. 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.
TV camera
window
magnetic tape
program
50. When detectors acquire their information through ____ they are receiving all the info at once.
byte
bandwidth
voltage
array detection