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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. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
digital image
analog-to-digital converters
2^x
2. What determines resolution?
pixel size
band-pass filtering
1960s
scanning
3. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
scanning
RAM
numerical values
4. The number of shades of gray is determined by what?
gray scale bit depth
scanning or array detection
bandwidth
CD or DVD
5. What is an individual matrix box or picture element?
Fourier Transformation
transverse - sagittal - and coronal
pixel
slow scanning
6. What is the measure of the differences between the data values referred to as?
high
contrast
CPU - Bus
band-pass filtering
7. A __ _____ disk will store over 10000000 bytes of information.
matrix size
binary machine
gray scale bit depth
10 megabyte
8. Computer memory is often rated in terms of total ____ memory.
window level
0 - 1
byte
bandwidth
9. The number of shades of gray is determined by what?
2^x
reduces
gray scale bit depth
inverse
10. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
analog-to-digital converters
contrast
transverse - sagittal - and coronal
11. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
filtering
frequency
gray scale bit depth
health level 7
12. Which computers handle data composed of definite quantities of current?
1945
direct
digital computers
digital imaging and communication in medicine
13. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
CT and MRI
binary machine
10 megabyte
14. 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.
1-2 lp/mm
scanning or array detection
high-pass filtering
software
15. Noise is ____ related to contrast.
inversely
digital computers
program
bus speed
16. What are the two most common output devices?
monitors and printers
window width
smoothing
write memory
17. What does a 1 in binary code stand for?
on
analog computers
noise
CPU - Bus
18. What input device do radiographers use on a normal basis?
abacus
memory
IRs
inverse
19. What is an image that has been converted into numerical values for transmission or processing?
digital image
fine
frequency
transverse - sagittal - and coronal
20. What is required for collection of input information?
detector
memory
mathematical theory - solid-state electronics - and microchip technology
1940s
21. What is a square series of boxes that gives form to the image?
digital image
software
programs and data
matrix
22. Who or What is responsible for density changes on a digital image? On a manual image
TV camera
RAM
computer - radiographer
noise
23. 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?
low-pass filter
transverse - sagittal - and coronal
window
parallel - serial
24. A high S/N indicates ___ noise in the image.
abacus
little
10 megabyte
off
25. Modalities differ in bit depth that is available depending on the capabilities of what?
IR
IRs
low-pass - band-pass - and high-pass
numerical values
26. What 3 things were required prior to digital computer applications in medical imaging?
CPU - Bus
byte
frequency
mathematical theory - solid-state electronics - and microchip technology
27. In what time period did mathematical theory and solid-state electronics come out?
1940s
inversely
large amount
increase
28. Which type of information consists of operating instructions?
numerical value
program
voxel
software
29. Computer memory is often rated in terms of total ____ memory.
scanning or array detection
mathematical theory - solid-state electronics - and microchip technology
byte
gray scale bit depth
30. Digital detectors are capable of producing ______ shades of gray.
direct
central processing unit
1000+
bus speed
31. If window width increases - image contrast will ____.
window level
software
low
decrease
32. Computer equipment is called what?
inverse
hardware
low-pass filter
pixel size
33. What is high-pass filtering also called?
CPU - Bus
increase
magnetic tape
edge enhancement filtering or sharpening
34. Binary systems operate with a ___-symbol language.
TV camera
signal-to-noise ratio
software
two
35. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
digital image
bus
decrease
Input devices
36. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
progressive scanning
high
window
37. The human visual range is ___ or fewer shades of gray.
detector
1960s
32
numerical values
38. What are the two ways detectors acquire information?
CD or DVD
1945
scanning or array detection
accentuates or suppresses
39. Which computers handle data composed of definite quantities of current?
byte
data
digital computers
magnetic tape
40. Which memory replaces new information with the old; can change?
parallel - serial
low-pass - band-pass - and high-pass
write memory
numerical value
41. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
analog-to-digital converters
RAM - ROM
numerical value
array processors
42. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
edge enhancement filtering or sharpening
frequency - contrast - and noise
CD or DVD
43. Noise is ____ related to contrast.
inversely
smoothing
raster scan pattern
high-pass filtering
44. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.
high
0 - 1
program
fine
45. Which memory can only be extracted without alteration; cannot change?
abacus
read memory
two
bus
46. What modalities are array processors useful for?
reduces
edge enhancement filtering or sharpening
window
CT and MRI
47. What is the name for an 8-bit word?
digital computers
voltage
byte
IR
48. A high contrast image has a ___ frequency.
edge enhancement filtering or sharpening
high
health level 7
1000+
49. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
0 - 1
computers
decreased
low-pass filter
50. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
10 megabyte
numerical values
frequency