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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.
pixel size
electronic sources
high
smaller
2. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
detector
voxel
monitors and printers
Fourier Transformation
3. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
200 - 500-1000
monitors and printers
bus
4. Resolution is controlled by what?
voltage
matrix size
Input devices
1000+
5. Digital detectors are capable of producing ______ shades of gray.
10 megabyte
IR
1000+
numerical value
6. When detectors acquire their information by ____ they are receiving info from a specific area.
DICOM standard
IRs
increase
scanning
7. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
10 megabyte
digital computers
1970s-1990s
8. What is a square series of boxes that gives form to the image?
matrix
CD or DVD
computers
matrix size
9. What is a square series of boxes that gives form to the image?
central processing unit
matrix
number of values displayed per image side
array processors
10. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
numerical values
off
accentuates or suppresses
peripherals
11. Computer memory is often rated in terms of total ____ memory.
magnetic tape
IR
abacus
byte
12. A high S/N indicates ___ noise in the image.
low-pass filter
1960s
health level 7
little
13. Changes in window width are sometimes called gray scale ____ or ____.
mathematical theory - solid-state electronics - and microchip technology
detector
0 - 1
expansion or compression
14. What determines resolution?
pixel size
CPU - Bus
matrix
software
15. What is required for collection of input information?
detector
computer - radiographer
window level
low-pass filter
16. What input device do radiographers use on a normal basis?
inverse
filtering
inversely
IRs
17. Computers operate from ____ ____ language.
high-pass filtering
abacus
binary machine
computer - radiographer
18. What is the information stored as magnetic variations referred to as?
off
memory
TV camera
array detection
19. The computer either ____ or ____ selected frequencies during the filtering process.
bit
accentuates or suppresses
inverse
transverse - sagittal - and coronal
20. Digital detectors are capable of producing ______ shades of gray.
window
1000+
raster scan pattern
analog-to-digital converters
21. What type of memory storage devices are required for large amounts of data?
CD or DVD
accentuates or suppresses
computers
peripherals
22. 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.
increase
Fourier Transformation
software
0 - 1
23. What does a 0 in binary code stand for?
Input devices
off
program
high
24. Each pixel is capable of representing a wide range of what?
software
shades of gray
transverse - sagittal - and coronal
decreased
25. What is the name of the 'modern electronic computer'?
central processing unit
ENIAC
parallel - serial
smaller
26. What is the equation for determining gray scale bit depth?
progressive scanning
digital computers
2^x
data
27. The computer either ____ or ____ selected frequencies during the filtering process.
matrix
slow scanning
monitors and printers
accentuates or suppresses
28. What are the two types of information computers use?
1940s
RAM - ROM
Fourier Transformation
programs and data
29. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
window
1970s-1990s
gray scale bit depth
filtering
30. When was ENIAC invented?
frequency - contrast - and noise
slow scanning
1945
decrease
31. What was the earliest computer device called?
abacus
CD or DVD
signal-to-noise ratio
gray scale bit depth
32. Which type of information consists of collected facts?
number of values displayed per image side
data
IR
program
33. Changes in window width are sometimes called gray scale ____ or ____.
IR
expansion or compression
array processors
low-pass - band-pass - and high-pass
34. What are the 3 classifications of digitized image filters?
array detection
low-pass - band-pass - and high-pass
bus
greater
35. What type of scanning increases resolution slightly by scanning all 525 lines in order?
expansion or compression
digital computers
progressive scanning
scanning
36. What are the two ways detectors acquire information?
parallel - serial
matrix size
scanning or array detection
Fourier Transformation
37. Computer programs are called what?
low-pass filter
1-2 lp/mm
software
inversely
38. Window width and contrast have an ____ relationship.
bus
2^x
inverse
signal-to-noise ratio
39. Medical imaging is often achieved from information that has been processed by what?
large amount
analog-to-digital converters
expansion or compression
decrease
40. What are devices that process information?
TV camera
computers
1945
decreased
41. Binary systems operate with a ___-symbol language.
bus speed
little
two
numerical value
42. When detectors acquire their information through ____ they are receiving all the info at once.
electronic sources
array detection
32
on
43. Noise is ____ related to contrast.
10 megabyte
progressive scanning
smoothing
inversely
44. Noise is measured as what?
peripherals
analog computers
signal-to-noise ratio
numerical value
45. What is the information stored as magnetic variations referred to as?
analog computers
band-pass filtering
central processing unit
memory
46. A high contrast image has a ___ frequency.
high
peripherals
analog computers
direct
47. What is the primary limitation with the resolution on digital images?
read memory
raster scan pattern
matrix
inverse
48. The number of shades of gray is determined by what?
shades of gray
gray scale bit depth
program
numerical value
49. Increased noise = _____ image contrast.
voltage
gray scale bit depth
decreased
programs and data
50. What 3 things were required prior to digital computer applications in medical imaging?
programs and data
direct
mathematical theory - solid-state electronics - and microchip technology
numerical value