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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 type of memory storage devices are required for large amounts of data?
shades of gray
0 - 1
matrix
CD or DVD
2. Noise is measured as what?
1940s
signal-to-noise ratio
bandwidth
shades of gray
3. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
IR
parallel - serial
numerical values
4. There is a ___ relationship between subject contrast and acquired data contrast.
direct
number of values displayed per image side
1940s
band-pass filtering
5. Computers operate from ____ ____ language.
noise
binary machine
32
on
6. Binary systems operate with a ___-symbol language.
array detection
smaller
1960s
two
7. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
1-2 lp/mm
inversely
window width
8. What is the 'heart' of every computer?
digital image
smoothing
detector
central processing unit
9. Changes in window width are sometimes called gray scale ____ or ____.
expansion or compression
numerical value
accentuates or suppresses
increase
10. What are the two most common output devices?
monitors and printers
1970s-1990s
voxel
on
11. Digitalization of analog information (increases / reduces) the quality and quantity of information?
data
reduces
2^x
mathematical theory - solid-state electronics - and microchip technology
12. The ____ is the heart of the computer while the ___ is the vessels.
data
noise
CPU - Bus
pixel size
13. Medical imaging is often achieved from information that has been processed by what?
scanning
analog-to-digital converters
parallel - serial
bus
14. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
high
frequency - contrast - and noise
bus
15. All medical imaging is achieved with which type of computers?
parallel - serial
digital computers
ROM
hardware
16. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
Fourier Transformation
1970s-1990s
scanning or array detection
17. The number of shades of gray is determined by what?
digital image
gray scale bit depth
low-pass filter
software
18. Modalities differ in bit depth that is available depending on the capabilities of what?
frequency - contrast - and noise
IR
raster scan pattern
CD or DVD
19. What 3 things were required prior to digital computer applications in medical imaging?
computer - radiographer
programs and data
fine
mathematical theory - solid-state electronics - and microchip technology
20. Which type of information consists of operating instructions?
IRs
bit
program
1-2 lp/mm
21. Noise is ____ related to contrast.
digital computers
inversely
large amount
byte
22. What are the 3 classifications of digitized image filters?
voltage
accentuates or suppresses
low-pass - band-pass - and high-pass
digital computers
23. A high contrast image has a ___ frequency.
computers
ENIAC
mathematical theory - solid-state electronics - and microchip technology
high
24. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
read memory
central processing unit
transverse - sagittal - and coronal
raster scan pattern
25. Which memory can only be extracted without alteration; cannot change?
signal-to-noise ratio
read memory
bus
program
26. What was the earliest computer device called?
computers
abacus
little
frequency
27. When subject contrast is high - the acquired data contrast will be ____.
array processors
1940s
high
magnetic tape
28. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
2^x
peripherals
high
digital computers
29. What is the 'heart' of every computer?
noise
increase
central processing unit
frequency
30. Each pixel is capable of representing a wide range of what?
fine
shades of gray
digital computers
2^x
31. Which computers handle data composed of continuously varying electrical currents?
central processing unit
2^x
software
analog computers
32. Which computers handle data composed of definite quantities of current?
bus
decrease
CD or DVD
digital computers
33. What is an image that has been converted into numerical values for transmission or processing?
bus
digital image
smoothing
number of values displayed per image side
34. A __ _____ disk will store over 10000000 bytes of information.
10 megabyte
ENIAC
1970s-1990s
monitors and printers
35. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
voltage
low-pass filter
programs and data
10 megabyte
36. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
greater
binary machine
bus
magnetic tape
37. The human visual range is ___ or fewer shades of gray.
increase
32
read memory
Input devices
38. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
voxel
1970s-1990s
band-pass filtering
voltage
39. Computer equipment is called what?
health level 7
CD or DVD
computer - radiographer
hardware
40. What is the measure of the differences between the data values referred to as?
bandwidth
byte
contrast
1000+
41. What are the two types of information computers use?
numerical value
bus
programs and data
hardware
42. Resolution is controlled by what?
software
matrix size
TV camera
computer - radiographer
43. If window width increases - image contrast will ____.
smaller
200 - 500-1000
memory
decrease
44. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
byte
digital imaging and communication in medicine
hardware
45. Digital detectors are capable of producing ______ shades of gray.
voltage
1000+
Input devices
10 megabyte
46. Computer memory is often rated in terms of total ____ memory.
binary machine
direct
memory
byte
47. What is high-pass filtering also called?
1940s
progressive scanning
edge enhancement filtering or sharpening
reduces
48. In what time period did microchip technology come out?
1970s-1990s
voxel
large amount
1960s
49. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
peripherals
10 megabyte
abacus
50. Who or What is responsible for density changes on a digital image? On a manual image
byte
1940s
computer - radiographer
slow scanning