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Test your basic knowledge |
Digital Image Processing
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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. 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.
CPU - Bus
edge enhancement filtering or sharpening
window
analog computers
2. The _____ the matrix size - the better the resolution.
numerical values
CPU - Bus
greater
direct
3. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
decreased
2^x
large amount
detector
4. If the window level increases - density will _____.
raster scan pattern
bus
central processing unit
increase
5. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
noise
slow scanning
shades of gray
6. 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?
voxel
window width
DICOM standard
voltage
7. What directs information to and from various parts of the computer?
central processing unit
voxel
1945
detector
8. 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.
off
analog-to-digital converters
high-pass filtering
computers
9. What is a square series of boxes that gives form to the image?
matrix
little
1970s-1990s
window width
10. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?
binary machine
decreased
numerical values
health level 7
11. What directs information to and from various parts of the computer?
central processing unit
memory
1945
digital imaging and communication in medicine
12. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
parallel - serial
smaller
array processors
13. Each pixel is capable of representing a wide range of what?
shades of gray
greater
edge enhancement filtering or sharpening
on
14. What determines resolution?
low-pass filter
pixel size
two
low
15. 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 size
detector
memory
low-pass filter
16. What type of scanning increases resolution but can't be used in real-time dynamic studies?
gray scale bit depth
inverse
slow scanning
voltage
17. The ____ is the heart of the computer while the ___ is the vessels.
program
decrease
CPU - Bus
reduces
18. Which type of information consists of operating instructions?
program
on
health level 7
edge enhancement filtering or sharpening
19. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
expansion or compression
DICOM standard
off
20. Changes in window width are sometimes called gray scale ____ or ____.
inverse
progressive scanning
expansion or compression
off
21. 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
high
accentuates or suppresses
raster scan pattern
22. When subject contrast is high - the acquired data contrast will be ____.
peripherals
programs and data
write memory
high
23. What is the mathematical algorithm used to create all medical images?
frequency - contrast - and noise
low-pass - band-pass - and high-pass
1940s
Fourier Transformation
24. The ____ is the heart of the computer while the ___ is the vessels.
1945
accentuates or suppresses
CPU - Bus
pixel
25. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
abacus
programs and data
1970s-1990s
200 - 500-1000
26. What is a square series of boxes that gives form to the image?
matrix
analog-to-digital converters
32
digital image
27. The number of shades of gray is determined by what?
accentuates or suppresses
gray scale bit depth
peripherals
progressive scanning
28. What is an image that has been converted into numerical values for transmission or processing?
decrease
digital image
large amount
1970s-1990s
29. A __ _____ disk will store over 10000000 bytes of information.
digital computers
scanning or array detection
health level 7
10 megabyte
30. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
CT and MRI
numerical value
analog computers
bus
31. What is the primary limitation with the resolution on digital images?
mathematical theory - solid-state electronics - and microchip technology
hardware
raster scan pattern
10 megabyte
32. What provides specific instructions for calculations and sequential steps to be followed?
software
greater
digital computers
voxel
33. What are devices that process information?
byte
scanning or array detection
computers
large amount
34. Modalities differ in bit depth that is available depending on the capabilities of what?
hardware
RAM - ROM
IR
bit
35. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
number of values displayed per image side
fine
high
low-pass - band-pass - and high-pass
36. Which memory can only be extracted without alteration; cannot change?
matrix size
1945
CPU - Bus
read memory
37. If window width increases - image contrast will ____.
decrease
2^x
detector
CD or DVD
38. What is the mathematical algorithm used to create all medical images?
0 - 1
Fourier Transformation
electronic sources
software
39. Binary systems operate with a ___-symbol language.
1-2 lp/mm
two
digital imaging and communication in medicine
array detection
40. What 3 things were required prior to digital computer applications in medical imaging?
inversely
raster scan pattern
1000+
mathematical theory - solid-state electronics - and microchip technology
41. What is the information stored as magnetic variations referred to as?
bit
DICOM standard
memory
smaller
42. What changes the pixel value by multiplication or division and controls image contrast?
mathematical theory - solid-state electronics - and microchip technology
window width
data
CD or DVD
43. Increased noise = _____ image contrast.
decreased
pixel
expansion or compression
high-pass filtering
44. Digital detectors are capable of producing ______ shades of gray.
bus
1000+
on
1-2 lp/mm
45. Fluoroscopic noise mostly comes from what?
health level 7
IRs
electronic sources
numerical value
46. When was ENIAC invented?
1945
hardware
high
32
47. What permit input/output of information to or from the CPU?
two
numerical values
10 megabyte
peripherals
48. Computer equipment is called what?
hardware
RAM - ROM
analog-to-digital converters
bit
49. Changes in window width are sometimes called gray scale ____ or ____.
memory
voltage
expansion or compression
software
50. What is an image that has been converted into numerical values for transmission or processing?
on
digital image
1-2 lp/mm
pixel
Can you answer 50 questions in 15 minutes?
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