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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. Who or What is responsible for density changes on a digital image? On a manual image
Input devices
bus
gray scale bit depth
computer - radiographer
2. What is the primary limitation with the resolution on digital images?
raster scan pattern
detector
array processors
data
3. 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
progressive scanning
two
smoothing
4. Medical imaging is often achieved from information that has been processed by what?
pixel
hardware
high-pass filtering
analog-to-digital converters
5. Resolution is controlled by what?
mathematical theory - solid-state electronics - and microchip technology
slow scanning
matrix size
window width
6. What is critical to how fast the computer system can function?
IR
hardware
peripherals
bus speed
7. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
high
analog computers
1940s
8. What is the 'heart' of every computer?
number of values displayed per image side
greater
central processing unit
bandwidth
9. If the window level increases - density will _____.
increase
program
low-pass filter
analog computers
10. What is the random background information that does not contribute to the image quality?
accentuates or suppresses
software
noise
200 - 500-1000
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.
high-pass filtering
accentuates or suppresses
signal-to-noise ratio
CPU - Bus
12. The _____ the matrix size - the better the resolution.
32
IR
greater
1960s
13. Which computers handle data composed of definite quantities of current?
inverse
digital computers
byte
high
14. Modalities differ in bit depth that is available depending on the capabilities of what?
IR
low-pass filter
band-pass filtering
noise
15. Noise is measured as what?
1000+
shades of gray
signal-to-noise ratio
2^x
16. Which type of information consists of collected facts?
data
Fourier Transformation
software
matrix size
17. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
scanning or array detection
number of values displayed per image side
filtering
18. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
IRs
bus speed
digital computers
parallel - serial
19. Which memory replaces new information with the old; can change?
analog-to-digital converters
write memory
software
contrast
20. What provides specific instructions for calculations and sequential steps to be followed?
pixel
program
IRs
software
21. What is the information stored as magnetic variations referred to as?
memory
accentuates or suppresses
analog-to-digital converters
binary machine
22. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
1940s
digital image
array processors
2^x
23. What is the mathematical algorithm used to create all medical images?
memory
electronic sources
Fourier Transformation
filtering
24. Binary systems operate with a ___-symbol language.
little
analog computers
bandwidth
two
25. When subject contrast is high - the acquired data contrast will be ____.
bus
memory
read memory
high
26. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
monitors and printers
contrast
1-2 lp/mm
numerical values
27. The human visual range is ___ or fewer shades of gray.
program
pixel
little
32
28. In what time period did mathematical theory and solid-state electronics come out?
on
1940s
IR
fine
29. 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
matrix size
0 - 1
RAM - ROM
30. When was ENIAC invented?
gray scale bit depth
1945
200 - 500-1000
byte
31. A __ _____ disk will store over 10000000 bytes of information.
filtering
voltage
10 megabyte
hardware
32. What are the two ways detectors acquire information?
10 megabyte
scanning or array detection
signal-to-noise ratio
high
33. What was the earliest computer device called?
1945
parallel - serial
abacus
IRs
34. All medical imaging is achieved with which type of computers?
0 - 1
window width
CT and MRI
digital computers
35. What does a 0 in binary code stand for?
edge enhancement filtering or sharpening
signal-to-noise ratio
window width
off
36. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
window
1945
decreased
numerical value
37. There is a ___ relationship between subject contrast and acquired data contrast.
progressive scanning
direct
1000+
signal-to-noise ratio
38. Computer programs are called what?
software
greater
binary machine
hardware
39. What is required for collection of input information?
contrast
expansion or compression
detector
expansion or compression
40. What does DICOM stand for?
matrix size
digital imaging and communication in medicine
low-pass - band-pass - and high-pass
CT and MRI
41. Digital detectors are capable of producing ______ shades of gray.
1000+
pixel
band-pass filtering
array detection
42. What is the name for an 8-bit word?
contrast
gray scale bit depth
digital image
byte
43. What is the frequency response of the incoming signal called?
window width
noise
DICOM standard
bandwidth
44. When subject contrast is high - the acquired data contrast will be ____.
peripherals
window level
window level
high
45. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
computers
32
RAM
frequency - contrast - and noise
46. What is the mathematical algorithm used to create all medical images?
data
RAM
health level 7
Fourier Transformation
47. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
bus speed
read memory
greater
48. What determines resolution?
matrix size
pixel size
bandwidth
RAM
49. In what time period did microchip technology come out?
1960s
low-pass filter
greater
low
50. What is the primary limitation with the resolution on digital images?
raster scan pattern
DICOM standard
pixel
0 - 1