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Test your basic knowledge |
Digital Image Processing
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Study First
Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. Each pixel is capable of representing a wide range of what?
smaller
edge enhancement filtering or sharpening
1000+
shades of gray
2. What does DICOM stand for?
digital imaging and communication in medicine
on
1-2 lp/mm
central processing unit
3. A high S/N indicates ___ noise in the image.
frequency
direct
CPU - Bus
little
4. A low contrast image has a ___ frequency.
low
inversely
10 megabyte
health level 7
5. If the window level increases - density will _____.
inverse
magnetic tape
increase
greater
6. What is the random background information that does not contribute to the image quality?
progressive scanning
raster scan pattern
noise
mathematical theory - solid-state electronics - and microchip technology
7. What is a square series of boxes that gives form to the image?
binary machine
fine
matrix
write memory
8. What is the 'heart' of every computer?
programs and data
central processing unit
detector
TV camera
9. What changes the pixel value by addition or subtraction and controls image density?
high
pixel size
window level
bandwidth
10. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
voxel
1945
window
low-pass filter
11. The number of shades of gray is determined by what?
health level 7
central processing unit
monitors and printers
gray scale bit depth
12. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
voxel
numerical values
high
read memory
13. When subject contrast is high - the acquired data contrast will be ____.
signal-to-noise ratio
high
mathematical theory - solid-state electronics - and microchip technology
peripherals
14. Computer equipment is called what?
1-2 lp/mm
hardware
computer - radiographer
voxel
15. Computers operate from ____ ____ language.
binary machine
smaller
software
reduces
16. 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.
mathematical theory - solid-state electronics - and microchip technology
window
central processing unit
inverse
17. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
accentuates or suppresses
magnetic tape
accentuates or suppresses
read memory
18. Which memory replaces new information with the old; can change?
write memory
decreased
accentuates or suppresses
high
19. What is the primary limitation with the resolution on digital images?
DICOM standard
raster scan pattern
numerical values
central processing unit
20. What provides specific instructions for calculations and sequential steps to be followed?
analog computers
software
array detection
off
21. What provides specific instructions for calculations and sequential steps to be followed?
edge enhancement filtering or sharpening
software
bus
inversely
22. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
scanning
RAM
scanning or array detection
slow scanning
23. Fluoroscopic noise mostly comes from what?
health level 7
window
mathematical theory - solid-state electronics - and microchip technology
electronic sources
24. There is a ___ relationship between subject contrast and acquired data contrast.
direct
smaller
bus speed
accentuates or suppresses
25. What directs information to and from various parts of the computer?
little
array processors
central processing unit
filtering
26. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
computer - radiographer
parallel - serial
large amount
low-pass filter
27. 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?
high-pass filtering
matrix size
health level 7
magnetic tape
28. What modalities are array processors useful for?
pixel
CT and MRI
analog-to-digital converters
band-pass filtering
29. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
window width
band-pass filtering
numerical value
Input devices
30. What does a 0 in binary code stand for?
fine
shades of gray
computer - radiographer
off
31. What does a 1 in binary code stand for?
frequency - contrast - and noise
on
binary machine
frequency
32. What input device do radiographers use on a normal basis?
1940s
IRs
ROM
window level
33. A larger matrix provides ____ pixels.
scanning
smaller
fine
window level
34. What can memory be transferred as?
abacus
pixel
voltage
transverse - sagittal - and coronal
35. Binary systems operate with a ___-symbol language.
200 - 500-1000
scanning
CT and MRI
two
36. What is an individual matrix box or picture element?
bit
bus
1940s
pixel
37. In what time period did mathematical theory and solid-state electronics come out?
peripherals
digital imaging and communication in medicine
1940s
window width
38. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
scanning or array detection
RAM
1940s
byte
39. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
bandwidth
accentuates or suppresses
fine
40. Modalities differ in bit depth that is available depending on the capabilities of what?
large amount
bandwidth
IR
central processing unit
41. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
software
off
voltage
parallel - serial
42. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
software
analog-to-digital converters
expansion or compression
43. Which memory replaces new information with the old; can change?
raster scan pattern
ENIAC
frequency
write memory
44. Each pixel is capable of representing a wide range of what?
progressive scanning
increase
RAM - ROM
shades of gray
45. The quality of the data acquired from the IR is measured by what three data characteristics?
band-pass filtering
detector
increase
frequency - contrast - and noise
46. What determines resolution?
1945
1970s-1990s
signal-to-noise ratio
pixel size
47. All medical imaging is achieved with which type of computers?
hardware
digital computers
high
smoothing
48. What is the frequency response of the incoming signal called?
binary machine
transverse - sagittal - and coronal
health level 7
bandwidth
49. Which computers handle data composed of definite quantities of current?
digital computers
increase
computer - radiographer
window level
50. What is the frequency response of the incoming signal called?
2^x
bandwidth
matrix
peripherals
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