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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 random background information that does not contribute to the image quality?
programs and data
contrast
CPU - Bus
noise
2. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
shades of gray
200 - 500-1000
high
direct
3. What is the primary limitation with the resolution on digital images?
high-pass filtering
2^x
numerical value
raster scan pattern
4. What is the 'heart' of every computer?
low-pass filter
0 - 1
digital computers
central processing unit
5. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
slow scanning
2^x
magnetic tape
accentuates or suppresses
6. Computer memory is often rated in terms of total ____ memory.
inverse
array processors
byte
window width
7. What does a 0 in binary code stand for?
frequency
scanning
low-pass filter
off
8. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
low-pass filter
binary machine
off
abacus
9. What is critical to how fast the computer system can function?
bus speed
TV camera
magnetic tape
progressive scanning
10. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
scanning or array detection
off
edge enhancement filtering or sharpening
11. What provides specific instructions for calculations and sequential steps to be followed?
electronic sources
1945
low-pass - band-pass - and high-pass
software
12. There is a ___ relationship between subject contrast and acquired data contrast.
signal-to-noise ratio
direct
programs and data
scanning
13. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
write memory
Input devices
abacus
analog computers
14. When was ENIAC invented?
Fourier Transformation
smoothing
program
1945
15. Digital detectors are capable of producing ______ shades of gray.
1000+
increase
progressive scanning
decreased
16. In what time period did mathematical theory and solid-state electronics come out?
window
frequency - contrast - and noise
on
1940s
17. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
read memory
parallel - serial
high-pass filtering
write memory
18. Which computers handle data composed of continuously varying electrical currents?
bus
transverse - sagittal - and coronal
analog computers
RAM - ROM
19. Computer programs are called what?
software
Input devices
progressive scanning
read memory
20. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
low-pass filter
on
computer - radiographer
21. A larger matrix provides ____ pixels.
software
smaller
computers
200 - 500-1000
22. 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.
digital image
10 megabyte
high-pass filtering
shades of gray
23. A __ _____ disk will store over 10000000 bytes of information.
10 megabyte
low-pass - band-pass - and high-pass
32
analog computers
24. What provides specific instructions for calculations and sequential steps to be followed?
high-pass filtering
byte
monitors and printers
software
25. What is the frequency response of the incoming signal called?
bandwidth
bus
hardware
hardware
26. The quality of the data acquired from the IR is measured by what three data characteristics?
CT and MRI
large amount
DICOM standard
frequency - contrast - and noise
27. When was ENIAC invented?
window
raster scan pattern
binary machine
1945
28. What is the name for a binary digit?
inverse
RAM - ROM
bit
direct
29. Which type of information consists of collected facts?
numerical values
data
noise
peripherals
30. What input device do radiographers use on a normal basis?
IRs
10 megabyte
computers
digital imaging and communication in medicine
31. What is the name for a binary digit?
electronic sources
bit
scanning
electronic sources
32. What 3 things were required prior to digital computer applications in medical imaging?
software
scanning or array detection
binary machine
mathematical theory - solid-state electronics - and microchip technology
33. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
large amount
IRs
pixel size
34. What is the name for an 8-bit word?
magnetic tape
smaller
byte
DICOM standard
35. When subject contrast is high - the acquired data contrast will be ____.
memory
1940s
high
scanning or array detection
36. 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?
read memory
off
health level 7
DICOM standard
37. What is an individual matrix box or picture element?
pixel
programs and data
on
TV camera
38. What can memory be transferred as?
byte
voltage
scanning or array detection
mathematical theory - solid-state electronics - and microchip technology
39. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
2^x
1940s
10 megabyte
40. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
low-pass - band-pass - and high-pass
progressive scanning
voxel
array detection
41. The human visual range is ___ or fewer shades of gray.
high
32
smoothing
program
42. What changes the pixel value by multiplication or division and controls image contrast?
binary machine
parallel - serial
hardware
window width
43. Computerized digital images are described in terms of what
number of values displayed per image side
monitors and printers
1000+
TV camera
44. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
software
ROM
bus
health level 7
45. Which computers handle data composed of definite quantities of current?
large amount
RAM - ROM
digital computers
CD or DVD
46. A high contrast image has a ___ frequency.
noise
program
high
numerical values
47. If window width increases - image contrast will ____.
software
decrease
binary machine
shades of gray
48. Which type of information consists of collected facts?
binary machine
inverse
data
bit
49. Digitalization of analog information (increases / reduces) the quality and quantity of information?
smoothing
voltage
central processing unit
reduces
50. When detectors acquire their information by ____ they are receiving info from a specific area.
bus
increase
scanning
DICOM standard