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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. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
ROM
inverse
1945
bus
2. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
1960s
smoothing
transverse - sagittal - and coronal
3. What type of scanning increases resolution slightly by scanning all 525 lines in order?
1-2 lp/mm
analog computers
low
progressive scanning
4. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
window width
progressive scanning
detector
numerical value
5. What are the two most common output devices?
contrast
1940s
monitors and printers
inversely
6. The ____ is the heart of the computer while the ___ is the vessels.
array processors
Fourier Transformation
CPU - Bus
contrast
7. What is the primary limitation with the resolution on digital images?
raster scan pattern
digital computers
ROM
CD or DVD
8. When subject contrast is high - the acquired data contrast will be ____.
high
2^x
software
computer - radiographer
9. What type of scanning increases resolution but can't be used in real-time dynamic studies?
filtering
1945
slow scanning
ENIAC
10. What is the 'heart' of every computer?
slow scanning
gray scale bit depth
detector
central processing unit
11. What provides specific instructions for calculations and sequential steps to be followed?
software
array detection
two
1960s
12. Which computers handle data composed of definite quantities of current?
1000+
bus
off
digital computers
13. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
TV camera
numerical value
IRs
bus
14. What is the frequency response of the incoming signal called?
1945
bandwidth
parallel - serial
central processing unit
15. What permit input/output of information to or from the CPU?
0 - 1
peripherals
software
bus
16. The number of shades of gray is determined by what?
window level
number of values displayed per image side
gray scale bit depth
decrease
17. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
inversely
transverse - sagittal - and coronal
TV camera
magnetic tape
18. Computer memory is often rated in terms of total ____ memory.
matrix size
CD or DVD
byte
pixel size
19. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
fine
increase
Input devices
IR
20. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
voltage
numerical values
pixel size
peripherals
21. 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.
parallel - serial
memory
window
central processing unit
22. Who or What is responsible for density changes on a digital image? On a manual image
smoothing
large amount
edge enhancement filtering or sharpening
computer - radiographer
23. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
on
CPU - Bus
gray scale bit depth
ROM
24. Fluoroscopic noise mostly comes from what?
1000+
ROM
electronic sources
200 - 500-1000
25. What permit input/output of information to or from the CPU?
peripherals
analog-to-digital converters
analog computers
edge enhancement filtering or sharpening
26. When was ENIAC invented?
numerical value
health level 7
numerical values
1945
27. The number of shades of gray is determined by what?
IR
gray scale bit depth
inversely
on
28. 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 speed
low-pass - band-pass - and high-pass
0 - 1
bus
29. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
decrease
IR
scanning or array detection
RAM - ROM
30. What type of memory storage devices are required for large amounts of data?
monitors and printers
TV camera
1960s
CD or DVD
31. Digital detectors are capable of producing ______ shades of gray.
1000+
health level 7
fine
bus speed
32. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
analog computers
software
array processors
low-pass - band-pass - and high-pass
33. What determines resolution?
decrease
pixel size
digital computers
increase
34. What changes the pixel value by multiplication or division and controls image contrast?
window width
program
software
fine
35. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
central processing unit
0 - 1
parallel - serial
1945
36. In what time period did mathematical theory and solid-state electronics come out?
slow scanning
program
1940s
high
37. A low contrast image has a ___ frequency.
low
analog computers
voltage
1000+
38. A high S/N indicates ___ noise in the image.
scanning or array detection
RAM
computers
little
39. What is the random background information that does not contribute to the image quality?
noise
1-2 lp/mm
2^x
increase
40. What is the mathematical algorithm used to create all medical images?
program
inversely
frequency - contrast - and noise
Fourier Transformation
41. Which type of information consists of operating instructions?
read memory
program
matrix
hardware
42. The ____ is the heart of the computer while the ___ is the vessels.
pixel size
scanning
computer - radiographer
CPU - Bus
43. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
slow scanning
noise
voxel
band-pass filtering
44. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
two
magnetic tape
voxel
increase
45. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
mathematical theory - solid-state electronics - and microchip technology
data
Input devices
signal-to-noise ratio
46. 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?
digital computers
matrix
on
transverse - sagittal - and coronal
47. What is the name for a binary digit?
monitors and printers
1940s
low-pass - band-pass - and high-pass
bit
48. What is the 'noisiest' component of a digital system?
central processing unit
1-2 lp/mm
TV camera
numerical values
49. Computer programs are called what?
memory
software
1970s-1990s
off
50. What changes the pixel value by multiplication or division and controls image contrast?
window width
signal-to-noise ratio
array processors
10 megabyte