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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 name for an 8-bit word?
0 - 1
off
IR
byte
2. 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
little
magnetic tape
analog computers
3. What changes the pixel value by addition or subtraction and controls image density?
decrease
off
monitors and printers
window level
4. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
CPU - Bus
low-pass - band-pass - and high-pass
peripherals
CT and MRI
5. What is high-pass filtering also called?
number of values displayed per image side
edge enhancement filtering or sharpening
inverse
direct
6. What is high-pass filtering also called?
two
digital image
edge enhancement filtering or sharpening
window level
7. What is the frequency response of the incoming signal called?
bus speed
pixel size
increase
bandwidth
8. 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.
electronic sources
window
electronic sources
number of values displayed per image side
9. What is the information stored as magnetic variations referred to as?
memory
window
pixel
byte
10. What changes the pixel value by multiplication or division and controls image contrast?
low-pass - band-pass - and high-pass
frequency - contrast - and noise
raster scan pattern
window width
11. There is a ___ relationship between subject contrast and acquired data contrast.
direct
low-pass - band-pass - and high-pass
band-pass filtering
numerical values
12. Who or What is responsible for density changes on a digital image? On a manual image
pixel size
computer - radiographer
hardware
detector
13. What is the name for an 8-bit word?
byte
TV camera
RAM
numerical value
14. Which memory can only be extracted without alteration; cannot change?
read memory
analog computers
IRs
computers
15. Which type of information consists of collected facts?
window level
data
CPU - Bus
mathematical theory - solid-state electronics - and microchip technology
16. What input device do radiographers use on a normal basis?
inversely
slow scanning
pixel size
IRs
17. What type of scanning increases resolution but can't be used in real-time dynamic studies?
window level
slow scanning
numerical value
health level 7
18. When detectors acquire their information through ____ they are receiving all the info at once.
CT and MRI
digital imaging and communication in medicine
array detection
read memory
19. What is the random background information that does not contribute to the image quality?
array processors
voltage
bus speed
noise
20. Computerized digital images are described in terms of what
scanning or array detection
signal-to-noise ratio
number of values displayed per image side
programs and data
21. What does a 0 in binary code stand for?
increase
computer - radiographer
off
pixel
22. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
CPU - Bus
computer - radiographer
byte
large amount
23. In what time period did mathematical theory and solid-state electronics come out?
IRs
low
1940s
digital computers
24. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
high-pass filtering
little
pixel size
25. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
central processing unit
large amount
smoothing
bit
26. What is a square series of boxes that gives form to the image?
health level 7
matrix
reduces
off
27. What are the 3 classifications of digitized image filters?
digital image
low-pass - band-pass - and high-pass
signal-to-noise ratio
ENIAC
28. In what time period did microchip technology come out?
1960s
RAM - ROM
peripherals
1970s-1990s
29. What permit input/output of information to or from the CPU?
peripherals
abacus
filtering
detector
30. What is the primary limitation with the resolution on digital images?
peripherals
scanning or array detection
raster scan pattern
bus
31. What is the name for a binary digit?
shades of gray
DICOM standard
bit
high
32. What permit input/output of information to or from the CPU?
magnetic tape
byte
software
peripherals
33. Resolution is controlled by what?
IR
high
matrix size
hardware
34. Which memory can only be extracted without alteration; cannot change?
read memory
data
scanning
peripherals
35. Increased noise = _____ image contrast.
decreased
RAM
1000+
programs and data
36. What changes the pixel value by addition or subtraction and controls image density?
2^x
window level
1945
1-2 lp/mm
37. The human visual range is ___ or fewer shades of gray.
read memory
32
high
window width
38. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
peripherals
1960s
pixel
39. Resolution is controlled by what?
TV camera
reduces
matrix size
hardware
40. What is the 'noisiest' component of a digital system?
number of values displayed per image side
TV camera
decreased
data
41. All medical imaging is achieved with which type of computers?
frequency
IR
Input devices
digital computers
42. What is required for collection of input information?
byte
detector
byte
1945
43. 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?
transverse - sagittal - and coronal
analog-to-digital converters
magnetic tape
TV camera
44. What are the two types of information computers use?
programs and data
bus
signal-to-noise ratio
digital imaging and communication in medicine
45. What input device do radiographers use on a normal basis?
program
matrix size
TV camera
IRs
46. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
read memory
window
pixel
47. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
smoothing
parallel - serial
matrix
numerical values
48. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?
health level 7
write memory
byte
numerical values
49. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
computers
direct
1-2 lp/mm
high
50. Which type of information consists of operating instructions?
RAM
computers
Fourier Transformation
program