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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. What is the primary limitation with the resolution on digital images?
32
large amount
raster scan pattern
1945
2. Medical imaging is often achieved from information that has been processed by what?
CT and MRI
central processing unit
1960s
analog-to-digital converters
3. What are the two ways detectors acquire information?
inversely
scanning or array detection
signal-to-noise ratio
raster scan pattern
4. What is the name for a binary digit?
digital imaging and communication in medicine
bus
bit
progressive scanning
5. What is the 'heart' of every computer?
gray scale bit depth
central processing unit
2^x
inversely
6. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
monitors and printers
numerical value
bus
RAM - ROM
7. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
IRs
matrix size
greater
8. Noise is ____ related to contrast.
inversely
200 - 500-1000
large amount
ENIAC
9. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
reduces
increase
1000+
numerical value
10. What does DICOM stand for?
filtering
CD or DVD
digital imaging and communication in medicine
smaller
11. When detectors acquire their information through ____ they are receiving all the info at once.
digital computers
array detection
monitors and printers
high
12. 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.
decreased
analog-to-digital converters
0 - 1
1940s
13. 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.
scanning
hardware
high-pass filtering
window width
14. A low contrast image has a ___ frequency.
frequency - contrast - and noise
low
RAM
pixel size
15. Increased noise = _____ image contrast.
window level
decreased
programs and data
voxel
16. What is critical to how fast the computer system can function?
health level 7
numerical values
binary machine
bus speed
17. Noise is measured as what?
0 - 1
signal-to-noise ratio
1000+
IR
18. Which type of information consists of collected facts?
data
bus
parallel - serial
detector
19. What is an individual matrix box or picture element?
signal-to-noise ratio
pixel
analog computers
smoothing
20. If the window level increases - density will _____.
low-pass - band-pass - and high-pass
1945
increase
byte
21. What is required for collection of input information?
bus
central processing unit
detector
programs and data
22. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
programs and data
high
array detection
23. What permit input/output of information to or from the CPU?
peripherals
detector
ROM
1945
24. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
inverse
reduces
transverse - sagittal - and coronal
25. Fluoroscopic noise mostly comes from what?
CPU - Bus
digital computers
inversely
electronic sources
26. What is the equation for determining gray scale bit depth?
2^x
TV camera
programs and data
1000+
27. Which type of information consists of operating instructions?
TV camera
shades of gray
program
voxel
28. Modalities differ in bit depth that is available depending on the capabilities of what?
scanning or array detection
IR
window width
low
29. 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?
progressive scanning
band-pass filtering
ENIAC
RAM
30. What is the mathematical algorithm used to create all medical images?
byte
matrix
increase
Fourier Transformation
31. 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.
health level 7
RAM
window
greater
32. In what time period did microchip technology come out?
ROM
bit
fine
1960s
33. What is the frequency response of the incoming signal called?
health level 7
bandwidth
digital image
numerical values
34. The number of shades of gray is determined by what?
32
magnetic tape
analog-to-digital converters
gray scale bit depth
35. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
analog-to-digital converters
byte
decrease
RAM - ROM
36. What does a 1 in binary code stand for?
on
parallel - serial
raster scan pattern
1945
37. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
array processors
2^x
increase
38. What is the 'noisiest' component of a digital system?
pixel
DICOM standard
off
TV camera
39. When detectors acquire their information by ____ they are receiving info from a specific area.
1970s-1990s
DICOM standard
scanning
200 - 500-1000
40. Binary systems operate with a ___-symbol language.
reduces
two
band-pass filtering
smoothing
41. The computer either ____ or ____ selected frequencies during the filtering process.
bit
data
progressive scanning
accentuates or suppresses
42. 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?
software
CD or DVD
DICOM standard
numerical values
43. What is high-pass filtering also called?
low-pass - band-pass - and high-pass
edge enhancement filtering or sharpening
voltage
IR
44. Which memory replaces new information with the old; can change?
greater
digital imaging and communication in medicine
write memory
IRs
45. Which memory can only be extracted without alteration; cannot change?
window level
mathematical theory - solid-state electronics - and microchip technology
read memory
scanning or array detection
46. Resolution is controlled by what?
digital computers
matrix size
edge enhancement filtering or sharpening
TV camera
47. Binary systems operate with a ___-symbol language.
decreased
memory
decrease
two
48. When was ENIAC invented?
bit
fine
1945
software
49. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
peripherals
byte
decreased
1-2 lp/mm
50. Medical imaging is often achieved from information that has been processed by what?
decreased
peripherals
window
analog-to-digital converters