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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 equation for determining gray scale bit depth?
32
2^x
electronic sources
RAM - ROM
2. Around what time did digital computerization come out for CT and US?
CT and MRI
1970s-1990s
IRs
digital computers
3. The computer either ____ or ____ selected frequencies during the filtering process.
voltage
TV camera
accentuates or suppresses
computer - radiographer
4. What determines resolution?
inversely
number of values displayed per image side
pixel size
voltage
5. What does DICOM stand for?
analog computers
magnetic tape
byte
digital imaging and communication in medicine
6. Computer memory is often rated in terms of total ____ memory.
binary machine
software
byte
bus
7. 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?
memory
computers
DICOM standard
bus
8. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
CT and MRI
large amount
RAM
9. All medical imaging is achieved with which type of computers?
electronic sources
slow scanning
bandwidth
digital computers
10. The number of shades of gray is determined by what?
high-pass filtering
numerical value
bus speed
gray scale bit depth
11. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
decreased
peripherals
TV camera
1000+
12. Which memory replaces new information with the old; can change?
write memory
analog computers
CT and MRI
little
13. 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?
band-pass filtering
program
transverse - sagittal - and coronal
numerical value
14. What is the information stored as magnetic variations referred to as?
slow scanning
memory
peripherals
inversely
15. What input device do radiographers use on a normal basis?
analog computers
abacus
program
IRs
16. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
increase
200 - 500-1000
IRs
large amount
17. What provides specific instructions for calculations and sequential steps to be followed?
software
10 megabyte
numerical value
two
18. What is the name of the 'modern electronic computer'?
1940s
ENIAC
Fourier Transformation
bus
19. Noise is ____ related to contrast.
IR
little
inversely
reduces
20. What does a 1 in binary code stand for?
bus
on
Fourier Transformation
noise
21. What are the two ways detectors acquire information?
bus
Fourier Transformation
scanning or array detection
programs and data
22. Window width and contrast have an ____ relationship.
inverse
frequency - contrast - and noise
peripherals
memory
23. What does a 0 in binary code stand for?
off
peripherals
health level 7
expansion or compression
24. The human visual range is ___ or fewer shades of gray.
frequency - contrast - and noise
abacus
32
read memory
25. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
accentuates or suppresses
health level 7
CPU - Bus
26. What is the name for a binary digit?
bit
TV camera
CPU - Bus
window width
27. In what time period did microchip technology come out?
1940s
detector
large amount
1960s
28. What changes the pixel value by multiplication or division and controls image contrast?
array processors
CPU - Bus
number of values displayed per image side
window width
29. Which computers handle data composed of definite quantities of current?
on
digital computers
DICOM standard
memory
30. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
byte
window
large amount
matrix
31. There is a ___ relationship between subject contrast and acquired data contrast.
direct
DICOM standard
smaller
peripherals
32. When subject contrast is high - the acquired data contrast will be ____.
detector
high
filtering
peripherals
33. What is critical to how fast the computer system can function?
digital computers
peripherals
bus speed
RAM - ROM
34. The _____ the matrix size - the better the resolution.
two
central processing unit
window
greater
35. The number of shades of gray is determined by what?
bit
on
pixel size
gray scale bit depth
36. All medical imaging is achieved with which type of computers?
digital image
DICOM standard
digital computers
1945
37. When was ENIAC invented?
1945
write memory
RAM - ROM
high
38. What input device do radiographers use on a normal basis?
low
electronic sources
low-pass filter
IRs
39. Which memory replaces new information with the old; can change?
write memory
1000+
program
filtering
40. Computer equipment is called what?
hardware
Input devices
IR
pixel size
41. What is the measure of the differences between the data values referred to as?
contrast
high-pass filtering
pixel size
raster scan pattern
42. 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?
central processing unit
binary machine
hardware
bus
43. What are the two most common output devices?
byte
digital image
monitors and printers
slow scanning
44. What are the two most common output devices?
32
ENIAC
memory
monitors and printers
45. What is the 'heart' of every computer?
matrix size
central processing unit
200 - 500-1000
shades of gray
46. Computers operate from ____ ____ language.
ROM
binary machine
voxel
high
47. Which memory can only be extracted without alteration; cannot change?
ENIAC
direct
software
read memory
48. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
byte
low-pass filter
Input devices
abacus
49. What changes the pixel value by addition or subtraction and controls image density?
high
window level
analog-to-digital converters
computer - radiographer
50. 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.
inverse
1945
large amount
window