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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. Who or What is responsible for density changes on a digital image? On a manual image
shades of gray
array processors
computer - radiographer
ENIAC
2. The computer either ____ or ____ selected frequencies during the filtering process.
bus
health level 7
detector
accentuates or suppresses
3. A __ _____ disk will store over 10000000 bytes of information.
read memory
32
10 megabyte
1-2 lp/mm
4. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
1940s
low-pass - band-pass - and high-pass
magnetic tape
voxel
5. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
hardware
ROM
bit
1945
6. A larger matrix provides ____ pixels.
ROM
1970s-1990s
smaller
filtering
7. What was the earliest computer device called?
monitors and printers
abacus
0 - 1
1-2 lp/mm
8. What modalities are array processors useful for?
binary machine
smoothing
electronic sources
CT and MRI
9. What is the random background information that does not contribute to the image quality?
bandwidth
1940s
low-pass filter
noise
10. What is the mathematical algorithm used to create all medical images?
gray scale bit depth
Fourier Transformation
increase
1960s
11. Increased noise = _____ image contrast.
decreased
binary machine
low-pass - band-pass - and high-pass
digital computers
12. What are devices that process information?
byte
1000+
computers
band-pass filtering
13. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
digital computers
two
ROM
slow scanning
14. 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
bit
1940s
15. What input device do radiographers use on a normal basis?
large amount
IRs
1-2 lp/mm
two
16. 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?
data
transverse - sagittal - and coronal
CT and MRI
central processing unit
17. Window width and contrast have an ____ relationship.
byte
200 - 500-1000
pixel size
inverse
18. When detectors acquire their information through ____ they are receiving all the info at once.
central processing unit
array detection
bit
matrix size
19. 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?
numerical value
bus
1945
band-pass filtering
20. What can memory be transferred as?
digital imaging and communication in medicine
software
voltage
bus speed
21. What does a 0 in binary code stand for?
monitors and printers
inverse
off
IRs
22. The number of shades of gray is determined by what?
slow scanning
gray scale bit depth
peripherals
central processing unit
23. Around what time did digital computerization come out for CT and US?
1970s-1990s
TV camera
low
pixel size
24. Around what time did digital computerization come out for CT and US?
1970s-1990s
analog-to-digital converters
parallel - serial
data
25. What is the frequency response of the incoming signal called?
frequency
bandwidth
pixel
high
26. What is required for collection of input information?
high
detector
two
smaller
27. There is a ___ relationship between subject contrast and acquired data contrast.
scanning or array detection
edge enhancement filtering or sharpening
direct
pixel
28. Noise is ____ related to contrast.
magnetic tape
bus
high
inversely
29. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
high
1000+
fine
large amount
30. 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?
CD or DVD
DICOM standard
10 megabyte
bit
31. 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
voltage
magnetic tape
Fourier Transformation
32. Which type of information consists of operating instructions?
shades of gray
program
read memory
1970s-1990s
33. Computer equipment is called what?
10 megabyte
hardware
on
inverse
34. What is required for collection of input information?
bus
detector
central processing unit
byte
35. Which memory replaces new information with the old; can change?
high
write memory
array detection
high
36. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
abacus
analog computers
1-2 lp/mm
37. Which memory replaces new information with the old; can change?
numerical value
number of values displayed per image side
write memory
magnetic tape
38. What is the mathematical algorithm used to create all medical images?
1940s
Fourier Transformation
noise
off
39. What permit input/output of information to or from the CPU?
scanning or array detection
magnetic tape
low-pass filter
peripherals
40. Noise is measured as what?
digital computers
1945
signal-to-noise ratio
1960s
41. Noise is measured as what?
window width
signal-to-noise ratio
voltage
magnetic tape
42. Computer equipment is called what?
1945
matrix
binary machine
hardware
43. If the window level increases - density will _____.
digital computers
numerical value
increase
window level
44. What is the name for an 8-bit word?
byte
0 - 1
computers
software
45. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
data
software
software
bus
46. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
memory
parallel - serial
high
memory
47. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
high
Input devices
little
48. 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?
1970s-1990s
Input devices
transverse - sagittal - and coronal
peripherals
49. Resolution is controlled by what?
data
Fourier Transformation
matrix size
ENIAC
50. What is the name for a binary digit?
frequency
bit
2^x
CT and MRI