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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. There is a ___ relationship between subject contrast and acquired data contrast.
CT and MRI
health level 7
direct
programs and data
2. The ____ is the heart of the computer while the ___ is the vessels.
memory
1000+
CPU - Bus
number of values displayed per image side
3. Computer programs are called what?
reduces
software
digital image
digital image
4. Computer equipment is called what?
decreased
abacus
bus
hardware
5. Each pixel is capable of representing a wide range of what?
numerical values
shades of gray
high
high
6. What does a 1 in binary code stand for?
matrix
transverse - sagittal - and coronal
on
pixel size
7. Computers operate from ____ ____ language.
binary machine
inversely
frequency - contrast - and noise
frequency
8. What was the earliest computer device called?
noise
memory
software
abacus
9. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
software
window width
accentuates or suppresses
10. The computer either ____ or ____ selected frequencies during the filtering process.
RAM
accentuates or suppresses
computers
programs and data
11. Binary systems operate with a ___-symbol language.
two
computer - radiographer
window level
digital imaging and communication in medicine
12. If window width increases - image contrast will ____.
voltage
peripherals
raster scan pattern
decrease
13. What type of memory storage devices are required for large amounts of data?
edge enhancement filtering or sharpening
CD or DVD
high
digital imaging and communication in medicine
14. What is a square series of boxes that gives form to the image?
DICOM standard
matrix
central processing unit
data
15. Computer memory is often rated in terms of total ____ memory.
byte
frequency - contrast - and noise
filtering
computers
16. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
scanning or array detection
contrast
matrix
17. What is an individual matrix box or picture element?
200 - 500-1000
analog computers
pixel
edge enhancement filtering or sharpening
18. 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
digital computers
reduces
byte
19. Resolution is controlled by what?
inversely
matrix size
central processing unit
shades of gray
20. 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?
transverse - sagittal - and coronal
central processing unit
shades of gray
binary machine
21. What is the 'noisiest' component of a digital system?
computers
software
TV camera
Fourier Transformation
22. What can memory be transferred as?
1960s
voltage
bit
32
23. The _____ the matrix size - the better the resolution.
greater
window
little
mathematical theory - solid-state electronics - and microchip technology
24. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
parallel - serial
large amount
frequency
computers
25. What does a 0 in binary code stand for?
signal-to-noise ratio
off
band-pass filtering
computer - radiographer
26. Which computers handle data composed of definite quantities of current?
0 - 1
1945
central processing unit
digital computers
27. What is the equation for determining gray scale bit depth?
smoothing
2^x
magnetic tape
bus
28. 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?
transverse - sagittal - and coronal
software
bus
smaller
29. If window width increases - image contrast will ____.
decrease
edge enhancement filtering or sharpening
two
window
30. 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.
software
0 - 1
digital image
inversely
31. What is the name of the 'modern electronic computer'?
ENIAC
edge enhancement filtering or sharpening
DICOM standard
noise
32. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
numerical value
electronic sources
program
1000+
33. Which type of information consists of collected facts?
smoothing
10 megabyte
raster scan pattern
data
34. Fluoroscopic noise mostly comes from what?
voxel
200 - 500-1000
0 - 1
electronic sources
35. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
detector
numerical values
shades of gray
byte
36. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
1-2 lp/mm
Input devices
parallel - serial
37. 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?
voxel
IR
bus
reduces
38. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
bus
inversely
smoothing
CT and MRI
39. What changes the pixel value by addition or subtraction and controls image density?
Fourier Transformation
32
window level
scanning or array detection
40. The human visual range is ___ or fewer shades of gray.
magnetic tape
expansion or compression
32
high-pass filtering
41. What is the raw data to which a Fourier Transformation is applied to create the digital image?
band-pass filtering
number of values displayed per image side
1000+
frequency
42. Increased noise = _____ image contrast.
signal-to-noise ratio
IR
digital computers
decreased
43. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
central processing unit
binary machine
write memory
44. Which type of information consists of operating instructions?
program
mathematical theory - solid-state electronics - and microchip technology
edge enhancement filtering or sharpening
1000+
45. What is the name for an 8-bit word?
byte
transverse - sagittal - and coronal
greater
low
46. There is a ___ relationship between subject contrast and acquired data contrast.
low-pass filter
hardware
bus speed
direct
47. What is the frequency response of the incoming signal called?
frequency
number of values displayed per image side
progressive scanning
bandwidth
48. Computerized digital images are described in terms of what
voltage
number of values displayed per image side
inversely
low-pass - band-pass - and high-pass
49. The number of shades of gray is determined by what?
band-pass filtering
gray scale bit depth
little
digital computers
50. What are the two most common output devices?
CD or DVD
low-pass - band-pass - and high-pass
monitors and printers
computers