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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. A larger matrix provides ____ pixels.
large amount
pixel size
inverse
smaller
2. What is the name for an 8-bit word?
window
array processors
byte
peripherals
3. In what time period did microchip technology come out?
byte
voxel
RAM - ROM
1960s
4. What is the frequency response of the incoming signal called?
low
inverse
matrix size
bandwidth
5. There is a ___ relationship between subject contrast and acquired data contrast.
direct
computer - radiographer
high-pass filtering
low
6. The number of shades of gray is determined by what?
gray scale bit depth
digital computers
peripherals
1000+
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.
high-pass filtering
inversely
window
1945
8. What does a 1 in binary code stand for?
hardware
bit
on
magnetic tape
9. The quality of the data acquired from the IR is measured by what three data characteristics?
greater
frequency - contrast - and noise
program
digital computers
10. What are the two most common output devices?
large amount
IR
monitors and printers
electronic sources
11. 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
ENIAC
write memory
hardware
12. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
software
RAM - ROM
byte
smoothing
13. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
scanning
large amount
TV camera
software
14. What is the name for an 8-bit word?
reduces
bus speed
window level
byte
15. If window width increases - image contrast will ____.
peripherals
10 megabyte
signal-to-noise ratio
decrease
16. What is an individual matrix box or picture element?
pixel
bus
data
CT and MRI
17. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
computer - radiographer
slow scanning
voltage
ROM
18. 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?
analog computers
window width
DICOM standard
slow scanning
19. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
digital computers
program
numerical values
1960s
20. All medical imaging is achieved with which type of computers?
inversely
health level 7
analog computers
digital computers
21. What modalities are array processors useful for?
CT and MRI
1-2 lp/mm
edge enhancement filtering or sharpening
filtering
22. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
pixel
low-pass filter
numerical value
array detection
23. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
monitors and printers
low-pass filter
digital image
fine
24. Changes in window width are sometimes called gray scale ____ or ____.
transverse - sagittal - and coronal
memory
smaller
expansion or compression
25. What is the frequency response of the incoming signal called?
write memory
bandwidth
ENIAC
byte
26. 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?
1945
number of values displayed per image side
band-pass filtering
digital imaging and communication in medicine
27. What 3 things were required prior to digital computer applications in medical imaging?
pixel
mathematical theory - solid-state electronics - and microchip technology
voxel
RAM
28. Computer equipment is called what?
hardware
low
IR
digital computers
29. Which type of information consists of collected facts?
byte
data
window
bus speed
30. Who or What is responsible for density changes on a digital image? On a manual image
low-pass - band-pass - and high-pass
low-pass filter
computer - radiographer
software
31. Noise is measured as what?
CPU - Bus
reduces
two
signal-to-noise ratio
32. Around what time did digital computerization come out for CT and US?
computers
1945
1970s-1990s
two
33. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
signal-to-noise ratio
bus
high-pass filtering
smoothing
34. Each pixel is capable of representing a wide range of what?
window width
shades of gray
digital imaging and communication in medicine
peripherals
35. When detectors acquire their information by ____ they are receiving info from a specific area.
electronic sources
digital image
scanning
frequency
36. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
smoothing
parallel - serial
low
37. What is the equation for determining gray scale bit depth?
expansion or compression
binary machine
2^x
low
38. What provides specific instructions for calculations and sequential steps to be followed?
computer - radiographer
shades of gray
software
1940s
39. What is the information stored as magnetic variations referred to as?
number of values displayed per image side
reduces
0 - 1
memory
40. Computerized digital images are described in terms of what
array detection
number of values displayed per image side
edge enhancement filtering or sharpening
ROM
41. All medical imaging is achieved with which type of computers?
scanning
off
band-pass filtering
digital computers
42. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
high-pass filtering
bus
1-2 lp/mm
analog-to-digital converters
43. The ____ is the heart of the computer while the ___ is the vessels.
progressive scanning
matrix size
read memory
CPU - Bus
44. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
digital computers
central processing unit
Fourier Transformation
low-pass filter
45. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
RAM - ROM
array detection
window
46. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
bus
high-pass filtering
matrix size
central processing unit
47. The human visual range is ___ or fewer shades of gray.
32
10 megabyte
200 - 500-1000
inverse
48. Fluoroscopic noise mostly comes from what?
matrix size
byte
10 megabyte
electronic sources
49. What directs information to and from various parts of the computer?
high
inversely
central processing unit
1000+
50. What is critical to how fast the computer system can function?
frequency - contrast - and noise
bus speed
expansion or compression
increase