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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. The _____ the matrix size - the better the resolution.
write memory
central processing unit
window
greater
2. When subject contrast is high - the acquired data contrast will be ____.
CD or DVD
1-2 lp/mm
high
scanning
3. Which memory replaces new information with the old; can change?
Input devices
write memory
large amount
1970s-1990s
4. If the window level increases - density will _____.
fine
array processors
increase
0 - 1
5. What 3 things were required prior to digital computer applications in medical imaging?
mathematical theory - solid-state electronics - and microchip technology
digital computers
little
voltage
6. A low contrast image has a ___ frequency.
smoothing
low
fine
number of values displayed per image side
7. What is critical to how fast the computer system can function?
1-2 lp/mm
bus speed
window level
health level 7
8. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
little
edge enhancement filtering or sharpening
Input devices
accentuates or suppresses
9. What type of scanning increases resolution slightly by scanning all 525 lines in order?
1970s-1990s
gray scale bit depth
central processing unit
progressive scanning
10. Computers operate from ____ ____ language.
slow scanning
binary machine
software
shades of gray
11. Computer programs are called what?
magnetic tape
voltage
inversely
software
12. What input device do radiographers use on a normal basis?
bus
low-pass - band-pass - and high-pass
IRs
signal-to-noise ratio
13. Which computers handle data composed of definite quantities of current?
off
smaller
digital computers
window width
14. What type of memory storage devices are required for large amounts of data?
monitors and printers
digital imaging and communication in medicine
CD or DVD
low-pass - band-pass - and high-pass
15. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?
DICOM standard
read memory
detector
bit
16. In what time period did microchip technology come out?
progressive scanning
1960s
scanning or array detection
TV camera
17. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
Fourier Transformation
1-2 lp/mm
program
greater
18. Who or What is responsible for density changes on a digital image? On a manual image
1-2 lp/mm
1945
gray scale bit depth
computer - radiographer
19. 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?
progressive scanning
bus
computer - radiographer
mathematical theory - solid-state electronics - and microchip technology
20. The number of shades of gray is determined by what?
gray scale bit depth
bit
matrix
1940s
21. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
frequency
low
computers
22. What does a 1 in binary code stand for?
digital computers
program
on
fine
23. What is the primary limitation with the resolution on digital images?
1960s
window
2^x
raster scan pattern
24. The _____ the matrix size - the better the resolution.
greater
voxel
mathematical theory - solid-state electronics - and microchip technology
IRs
25. In what time period did mathematical theory and solid-state electronics come out?
bus speed
direct
magnetic tape
1940s
26. 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.
bus speed
high-pass filtering
filtering
200 - 500-1000
27. 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.
low-pass - band-pass - and high-pass
bus
window
program
28. If window width increases - image contrast will ____.
smaller
decrease
binary machine
expansion or compression
29. Increased noise = _____ image contrast.
off
1970s-1990s
numerical values
decreased
30. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
reduces
low-pass - band-pass - and high-pass
large amount
memory
31. 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?
pixel
transverse - sagittal - and coronal
gray scale bit depth
peripherals
32. What is the name for a binary digit?
bit
raster scan pattern
CT and MRI
array detection
33. Computer equipment is called what?
hardware
smoothing
Fourier Transformation
smaller
34. What is required for collection of input information?
RAM - ROM
parallel - serial
detector
read memory
35. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
band-pass filtering
peripherals
central processing unit
signal-to-noise ratio
36. The ____ is the heart of the computer while the ___ is the vessels.
window
on
CPU - Bus
matrix size
37. Which type of information consists of operating instructions?
monitors and printers
contrast
program
central processing unit
38. When detectors acquire their information through ____ they are receiving all the info at once.
electronic sources
computer - radiographer
array detection
RAM - ROM
39. What is critical to how fast the computer system can function?
low-pass filter
off
computer - radiographer
bus speed
40. What is the random background information that does not contribute to the image quality?
noise
CD or DVD
high-pass filtering
TV camera
41. Computers operate from ____ ____ language.
binary machine
parallel - serial
slow scanning
matrix
42. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
frequency - contrast - and noise
peripherals
2^x
43. Resolution is controlled by what?
matrix size
programs and data
byte
contrast
44. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
programs and data
inversely
signal-to-noise ratio
RAM
45. The human visual range is ___ or fewer shades of gray.
32
filtering
digital computers
ENIAC
46. 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?
IR
band-pass filtering
read memory
bus speed
47. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
32
peripherals
IRs
48. A larger matrix provides ____ pixels.
matrix size
slow scanning
fine
smaller
49. What directs information to and from various parts of the computer?
central processing unit
32
transverse - sagittal - and coronal
bandwidth
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.
peripherals
numerical values
window
large amount