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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 are the two types of information computers use?
decrease
0 - 1
abacus
programs and data
2. What directs information to and from various parts of the computer?
fine
high
window level
central processing unit
3. Noise is measured as what?
array processors
signal-to-noise ratio
matrix
data
4. 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?
ROM
high
bus
window width
5. The ____ is the heart of the computer while the ___ is the vessels.
scanning or array detection
1945
bit
CPU - Bus
6. What is the frequency response of the incoming signal called?
bandwidth
numerical value
expansion or compression
decreased
7. What is a square series of boxes that gives form to the image?
large amount
window width
matrix
reduces
8. What is an individual matrix box or picture element?
read memory
reduces
decrease
pixel
9. Computerized digital images are described in terms of what
1970s-1990s
central processing unit
number of values displayed per image side
contrast
10. 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?
health level 7
high-pass filtering
increase
byte
11. What is the raw data to which a Fourier Transformation is applied to create the digital image?
bit
shades of gray
numerical value
frequency
12. When detectors acquire their information through ____ they are receiving all the info at once.
numerical value
array detection
little
high
13. What input device do radiographers use on a normal basis?
parallel - serial
direct
numerical value
IRs
14. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
2^x
inversely
computer - radiographer
15. What is the 'noisiest' component of a digital system?
1945
data
TV camera
mathematical theory - solid-state electronics - and microchip technology
16. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
matrix size
1940s
numerical value
peripherals
17. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
window
array detection
bus
peripherals
18. When detectors acquire their information by ____ they are receiving info from a specific area.
direct
filtering
frequency
scanning
19. What does a 1 in binary code stand for?
off
on
scanning
reduces
20. Which memory can only be extracted without alteration; cannot change?
filtering
byte
read memory
Input devices
21. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
analog computers
numerical values
1970s-1990s
scanning
22. What is the random background information that does not contribute to the image quality?
noise
peripherals
transverse - sagittal - and coronal
on
23. Which type of information consists of collected facts?
central processing unit
data
byte
IR
24. What is the 'heart' of every computer?
central processing unit
bus
decreased
inversely
25. When detectors acquire their information through ____ they are receiving all the info at once.
read memory
two
array detection
DICOM standard
26. What provides specific instructions for calculations and sequential steps to be followed?
ROM
software
memory
bus
27. 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?
window level
high-pass filtering
band-pass filtering
1000+
28. Binary systems operate with a ___-symbol language.
central processing unit
raster scan pattern
accentuates or suppresses
two
29. A larger matrix provides ____ pixels.
smaller
program
1000+
large amount
30. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
peripherals
data
large amount
200 - 500-1000
31. What is the 'noisiest' component of a digital system?
bus
inverse
TV camera
programs and data
32. Each pixel is capable of representing a wide range of what?
large amount
monitors and printers
shades of gray
low
33. Computer programs are called what?
inverse
fine
shades of gray
software
34. Which computers handle data composed of continuously varying electrical currents?
analog computers
write memory
raster scan pattern
memory
35. A __ _____ disk will store over 10000000 bytes of information.
analog-to-digital converters
10 megabyte
read memory
hardware
36. What does a 1 in binary code stand for?
on
peripherals
matrix size
numerical value
37. What modalities are array processors useful for?
numerical values
10 megabyte
bus
CT and MRI
38. The human visual range is ___ or fewer shades of gray.
digital image
low-pass filter
32
raster scan pattern
39. What is the random background information that does not contribute to the image quality?
two
bus
noise
computers
40. What type of scanning increases resolution but can't be used in real-time dynamic studies?
gray scale bit depth
digital computers
1970s-1990s
slow scanning
41. Computerized digital images are described in terms of what
bus
number of values displayed per image side
binary machine
electronic sources
42. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
parallel - serial
numerical values
abacus
200 - 500-1000
43. What is the information stored as magnetic variations referred to as?
memory
frequency - contrast - and noise
parallel - serial
shades of gray
44. Which memory replaces new information with the old; can change?
write memory
shades of gray
filtering
electronic sources
45. Changes in window width are sometimes called gray scale ____ or ____.
RAM - ROM
expansion or compression
parallel - serial
pixel
46. Around what time did digital computerization come out for CT and US?
CPU - Bus
TV camera
1970s-1990s
matrix size
47. What is the raw data to which a Fourier Transformation is applied to create the digital image?
decrease
magnetic tape
frequency
decreased
48. Noise is ____ related to contrast.
window level
software
band-pass filtering
inversely
49. Computer equipment is called what?
peripherals
scanning or array detection
hardware
computer - radiographer
50. What is the name of the 'modern electronic computer'?
read memory
ENIAC
voltage
1945
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