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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. There is a ___ relationship between subject contrast and acquired data contrast.
magnetic tape
32
direct
noise
2. Digital detectors are capable of producing ______ shades of gray.
digital image
low
1000+
frequency - contrast - and noise
3. Computer programs are called what?
gray scale bit depth
programs and data
1960s
software
4. What is high-pass filtering also called?
expansion or compression
edge enhancement filtering or sharpening
decrease
bit
5. The human visual range is ___ or fewer shades of gray.
software
32
matrix size
pixel
6. Which type of information consists of operating instructions?
program
array processors
slow scanning
inversely
7. What is high-pass filtering also called?
10 megabyte
edge enhancement filtering or sharpening
IRs
two
8. Computerized digital images are described in terms of what
low
Input devices
low-pass - band-pass - and high-pass
number of values displayed per image side
9. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
direct
expansion or compression
numerical values
ENIAC
10. What permit input/output of information to or from the CPU?
edge enhancement filtering or sharpening
peripherals
programs and data
digital image
11. What is the raw data to which a Fourier Transformation is applied to create the digital image?
computers
frequency
inversely
inverse
12. Computer equipment is called what?
voxel
hardware
accentuates or suppresses
frequency - contrast - and noise
13. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
raster scan pattern
slow scanning
analog-to-digital converters
14. What is the random background information that does not contribute to the image quality?
matrix
noise
computer - radiographer
10 megabyte
15. Binary systems operate with a ___-symbol language.
two
low-pass - band-pass - and high-pass
software
little
16. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
bandwidth
window
numerical value
numerical values
17. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
pixel size
0 - 1
software
Input devices
18. A low contrast image has a ___ frequency.
low
voxel
signal-to-noise ratio
matrix
19. Window width and contrast have an ____ relationship.
numerical value
decreased
accentuates or suppresses
inverse
20. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
1-2 lp/mm
Input devices
smoothing
magnetic tape
21. Noise is ____ related to contrast.
monitors and printers
central processing unit
1940s
inversely
22. Computer memory is often rated in terms of total ____ memory.
byte
programs and data
software
monitors and printers
23. What is the 'noisiest' component of a digital system?
bus
numerical value
pixel size
TV camera
24. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
2^x
matrix
1-2 lp/mm
25. Computer programs are called what?
bus
software
magnetic tape
band-pass filtering
26. What does DICOM stand for?
byte
transverse - sagittal - and coronal
digital imaging and communication in medicine
200 - 500-1000
27. What is the primary limitation with the resolution on digital images?
scanning
raster scan pattern
bandwidth
detector
28. What type of scanning increases resolution slightly by scanning all 525 lines in order?
filtering
frequency
progressive scanning
Fourier Transformation
29. What is the measure of the differences between the data values referred to as?
array processors
IRs
TV camera
contrast
30. 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?
ENIAC
magnetic tape
bus
DICOM standard
31. Around what time did digital computerization come out for CT and US?
greater
1970s-1990s
smoothing
Fourier Transformation
32. What modalities are array processors useful for?
RAM
CT and MRI
array detection
electronic sources
33. A larger matrix provides ____ pixels.
smaller
1960s
ROM
parallel - serial
34. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
analog-to-digital converters
digital imaging and communication in medicine
200 - 500-1000
matrix
35. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
large amount
digital computers
Input devices
36. There is a ___ relationship between subject contrast and acquired data contrast.
computers
Fourier Transformation
digital imaging and communication in medicine
direct
37. What can memory be transferred as?
voltage
analog computers
expansion or compression
health level 7
38. What changes the pixel value by multiplication or division and controls image contrast?
computers
computers
shades of gray
window width
39. What are devices that process information?
band-pass filtering
smaller
computers
decrease
40. What was the earliest computer device called?
abacus
data
1-2 lp/mm
analog computers
41. Which memory can only be extracted without alteration; cannot change?
peripherals
read memory
reduces
numerical value
42. When detectors acquire their information by ____ they are receiving info from a specific area.
frequency
scanning
detector
32
43. What 3 things were required prior to digital computer applications in medical imaging?
mathematical theory - solid-state electronics - and microchip technology
gray scale bit depth
matrix size
CPU - Bus
44. 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?
digital computers
increase
health level 7
low-pass - band-pass - and high-pass
45. What are the two most common output devices?
raster scan pattern
increase
monitors and printers
voxel
46. Which type of information consists of collected facts?
byte
numerical values
bus
data
47. What 3 things were required prior to digital computer applications in medical imaging?
array processors
bandwidth
mathematical theory - solid-state electronics - and microchip technology
contrast
48. The ____ is the heart of the computer while the ___ is the vessels.
bus
binary machine
gray scale bit depth
CPU - Bus
49. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
memory
parallel - serial
low-pass - band-pass - and high-pass
health level 7
50. What are the two ways detectors acquire information?
electronic sources
scanning or array detection
software
CT and MRI
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