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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. Resolution is controlled by what?
matrix size
bit
mathematical theory - solid-state electronics - and microchip technology
electronic sources
2. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
decreased
CD or DVD
health level 7
3. Computers operate from ____ ____ language.
binary machine
health level 7
CD or DVD
bit
4. What are devices that process information?
inversely
CD or DVD
electronic sources
computers
5. When was ENIAC invented?
1945
inversely
health level 7
signal-to-noise ratio
6. What is high-pass filtering also called?
pixel size
edge enhancement filtering or sharpening
voltage
read memory
7. 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.
low-pass - band-pass - and high-pass
analog-to-digital converters
analog computers
window
8. Window width and contrast have an ____ relationship.
binary machine
software
detector
inverse
9. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
1940s
bus
1970s-1990s
voltage
10. A high S/N indicates ___ noise in the image.
bandwidth
little
CT and MRI
CT and MRI
11. A larger matrix provides ____ pixels.
matrix size
high
programs and data
smaller
12. What is the equation for determining gray scale bit depth?
binary machine
edge enhancement filtering or sharpening
2^x
ROM
13. Which memory replaces new information with the old; can change?
pixel size
off
on
write memory
14. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
large amount
electronic sources
read memory
15. Computer memory is often rated in terms of total ____ memory.
byte
DICOM standard
shades of gray
software
16. Which computers handle data composed of continuously varying electrical currents?
Input devices
parallel - serial
analog computers
raster scan pattern
17. There is a ___ relationship between subject contrast and acquired data contrast.
program
CT and MRI
direct
signal-to-noise ratio
18. Digital detectors are capable of producing ______ shades of gray.
low-pass filter
1000+
bus speed
bus
19. The ____ is the heart of the computer while the ___ is the vessels.
peripherals
bus
CPU - Bus
digital image
20. What are the two ways detectors acquire information?
Input devices
scanning or array detection
IRs
2^x
21. Noise is measured as what?
signal-to-noise ratio
array detection
low
programs and data
22. What are the two most common output devices?
edge enhancement filtering or sharpening
expansion or compression
CPU - Bus
monitors and printers
23. Around what time did digital computerization come out for CT and US?
byte
digital image
number of values displayed per image side
1970s-1990s
24. Changes in window width are sometimes called gray scale ____ or ____.
filtering
data
expansion or compression
parallel - serial
25. What is the name of the 'modern electronic computer'?
pixel size
ENIAC
0 - 1
high-pass filtering
26. What are the 3 classifications of digitized image filters?
bandwidth
abacus
low-pass - band-pass - and high-pass
abacus
27. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
high
32
monitors and printers
28. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
gray scale bit depth
filtering
large amount
fine
29. What is the random background information that does not contribute to the image quality?
CPU - Bus
frequency - contrast - and noise
noise
fine
30. In what time period did mathematical theory and solid-state electronics come out?
programs and data
peripherals
1940s
array detection
31. What is the name of the 'modern electronic computer'?
ENIAC
central processing unit
number of values displayed per image side
on
32. Which memory replaces new information with the old; can change?
write memory
peripherals
CT and MRI
frequency
33. What does DICOM stand for?
10 megabyte
digital imaging and communication in medicine
software
frequency - contrast - and noise
34. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
number of values displayed per image side
digital imaging and communication in medicine
IRs
35. What does a 1 in binary code stand for?
on
window level
mathematical theory - solid-state electronics - and microchip technology
CPU - Bus
36. What modalities are array processors useful for?
CT and MRI
high
software
matrix
37. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
numerical value
expansion or compression
1000+
ROM
38. Computer equipment is called what?
hardware
peripherals
byte
CPU - Bus
39. What does DICOM stand for?
numerical value
digital imaging and communication in medicine
1-2 lp/mm
low
40. What is an individual matrix box or picture element?
electronic sources
binary machine
shades of gray
pixel
41. A high S/N indicates ___ noise in the image.
shades of gray
10 megabyte
fine
little
42. What determines resolution?
progressive scanning
pixel size
decreased
band-pass filtering
43. What does a 1 in binary code stand for?
1000+
on
CT and MRI
memory
44. 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?
filtering
DICOM standard
peripherals
hardware
45. 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
software
greater
ROM
46. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
2^x
transverse - sagittal - and coronal
bus
47. When subject contrast is high - the acquired data contrast will be ____.
signal-to-noise ratio
reduces
matrix size
high
48. Changes in window width are sometimes called gray scale ____ or ____.
expansion or compression
shades of gray
inverse
1940s
49. What is required for collection of input information?
off
decreased
detector
bus speed
50. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
programs and data
bus
contrast