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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 mathematical algorithm used to create all medical images?
software
Fourier Transformation
RAM
decrease
2. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
1970s-1990s
200 - 500-1000
bus
expansion or compression
3. 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.
analog-to-digital converters
0 - 1
window
reduces
4. What does a 0 in binary code stand for?
slow scanning
digital imaging and communication in medicine
off
numerical values
5. What is critical to how fast the computer system can function?
2^x
Fourier Transformation
bus speed
filtering
6. Window width and contrast have an ____ relationship.
IR
voxel
inverse
on
7. The number of shades of gray is determined by what?
expansion or compression
gray scale bit depth
bit
little
8. What is the information stored as magnetic variations referred to as?
memory
increase
array processors
scanning
9. What are the 3 classifications of digitized image filters?
IRs
filtering
low-pass - band-pass - and high-pass
10 megabyte
10. A __ _____ disk will store over 10000000 bytes of information.
signal-to-noise ratio
10 megabyte
digital image
noise
11. 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.
array processors
greater
high-pass filtering
programs and data
12. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
bus
bandwidth
direct
13. The human visual range is ___ or fewer shades of gray.
frequency - contrast - and noise
1945
32
band-pass filtering
14. When detectors acquire their information through ____ they are receiving all the info at once.
ENIAC
array detection
signal-to-noise ratio
frequency - contrast - and noise
15. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
1-2 lp/mm
increase
numerical value
CPU - Bus
16. Each pixel is capable of representing a wide range of what?
software
matrix size
health level 7
shades of gray
17. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
computer - radiographer
200 - 500-1000
bus
shades of gray
18. What is the name for a binary digit?
health level 7
bit
bus
high
19. A low contrast image has a ___ frequency.
numerical values
low
frequency - contrast - and noise
hardware
20. What modalities are array processors useful for?
CT and MRI
numerical value
1000+
number of values displayed per image side
21. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
high
high
matrix size
parallel - serial
22. All medical imaging is achieved with which type of computers?
reduces
scanning
digital computers
voltage
23. In what time period did mathematical theory and solid-state electronics come out?
CT and MRI
1940s
scanning or array detection
numerical values
24. A __ _____ disk will store over 10000000 bytes of information.
decrease
number of values displayed per image side
10 megabyte
CD or DVD
25. 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?
bus
voxel
noise
array detection
26. What is the frequency response of the incoming signal called?
number of values displayed per image side
bandwidth
programs and data
digital computers
27. The human visual range is ___ or fewer shades of gray.
32
digital computers
matrix size
memory
28. Digital detectors are capable of producing ______ shades of gray.
high
decreased
1000+
inverse
29. What is critical to how fast the computer system can function?
2^x
analog-to-digital converters
accentuates or suppresses
bus speed
30. What is the primary limitation with the resolution on digital images?
high-pass filtering
raster scan pattern
digital imaging and communication in medicine
CT and MRI
31. What is the raw data to which a Fourier Transformation is applied to create the digital image?
program
decreased
frequency
decrease
32. When was ENIAC invented?
pixel
gray scale bit depth
1945
digital image
33. Computers operate from ____ ____ language.
binary machine
low-pass filter
ROM
contrast
34. Window width and contrast have an ____ relationship.
electronic sources
contrast
32
inverse
35. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
inversely
electronic sources
peripherals
36. What is the name for a binary digit?
CPU - Bus
program
bit
Input devices
37. What can memory be transferred as?
frequency
RAM
voltage
memory
38. What directs information to and from various parts of the computer?
pixel size
central processing unit
computers
memory
39. Binary systems operate with a ___-symbol language.
two
array detection
noise
1960s
40. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
filtering
CD or DVD
software
decrease
41. What are the two most common output devices?
monitors and printers
data
slow scanning
peripherals
42. The _____ the matrix size - the better the resolution.
greater
numerical value
digital image
smoothing
43. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
accentuates or suppresses
RAM
smaller
on
44. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
32
Input devices
memory
IRs
45. What input device do radiographers use on a normal basis?
IRs
Input devices
progressive scanning
voltage
46. What type of scanning increases resolution slightly by scanning all 525 lines in order?
write memory
TV camera
magnetic tape
progressive scanning
47. What changes the pixel value by multiplication or division and controls image contrast?
voxel
window width
electronic sources
little
48. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
IRs
Input devices
accentuates or suppresses
0 - 1
49. A larger matrix provides ____ pixels.
200 - 500-1000
frequency
matrix
smaller
50. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
byte
computer - radiographer
slow scanning
peripherals