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Test your basic knowledge |
Digital Image Processing
Start Test
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. What is the frequency response of the incoming signal called?
bandwidth
detector
matrix size
mathematical theory - solid-state electronics - and microchip technology
2. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
Fourier Transformation
reduces
RAM - ROM
IRs
3. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
1970s-1990s
noise
low-pass filter
progressive scanning
4. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
1940s
decrease
mathematical theory - solid-state electronics - and microchip technology
5. What type of scanning increases resolution slightly by scanning all 525 lines in order?
byte
progressive scanning
computer - radiographer
frequency - contrast - and noise
6. The human visual range is ___ or fewer shades of gray.
voltage
32
window level
bus
7. Computers operate from ____ ____ language.
decrease
contrast
central processing unit
binary machine
8. Which type of information consists of operating instructions?
data
peripherals
on
program
9. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
0 - 1
health level 7
software
10. If window width increases - image contrast will ____.
bus
decrease
RAM
electronic sources
11. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
bus
digital image
low-pass filter
12. What does a 0 in binary code stand for?
gray scale bit depth
expansion or compression
off
scanning
13. What are the 3 classifications of digitized image filters?
bit
IRs
electronic sources
low-pass - band-pass - and high-pass
14. What is the frequency response of the incoming signal called?
digital computers
two
bandwidth
low
15. What are devices that process information?
1960s
computers
signal-to-noise ratio
voxel
16. When subject contrast is high - the acquired data contrast will be ____.
digital computers
edge enhancement filtering or sharpening
high
1-2 lp/mm
17. All medical imaging is achieved with which type of computers?
memory
contrast
digital computers
reduces
18. What modalities are array processors useful for?
CT and MRI
IR
bus speed
noise
19. The human visual range is ___ or fewer shades of gray.
filtering
high-pass filtering
1000+
32
20. What permit input/output of information to or from the CPU?
peripherals
software
ENIAC
detector
21. Which type of information consists of operating instructions?
bandwidth
monitors and printers
program
low
22. Computerized digital images are described in terms of what
bus speed
peripherals
contrast
number of values displayed per image side
23. What is required for collection of input information?
decreased
detector
memory
central processing unit
24. All medical imaging is achieved with which type of computers?
on
Fourier Transformation
DICOM standard
digital computers
25. What provides specific instructions for calculations and sequential steps to be followed?
electronic sources
low
software
fine
26. If window width increases - image contrast will ____.
decrease
numerical values
voltage
low-pass filter
27. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
IRs
32
fine
28. 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.
2^x
noise
0 - 1
progressive scanning
29. What is the name for an 8-bit word?
smaller
two
byte
1000+
30. Binary systems operate with a ___-symbol language.
matrix size
scanning
frequency
two
31. What directs information to and from various parts of the computer?
central processing unit
detector
array processors
numerical values
32. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
window width
fine
numerical value
33. Digital detectors are capable of producing ______ shades of gray.
decreased
band-pass filtering
1000+
abacus
34. Each pixel is capable of representing a wide range of what?
software
1960s
2^x
shades of gray
35. A larger matrix provides ____ pixels.
IR
smaller
decreased
decrease
36. What is the measure of the differences between the data values referred to as?
analog-to-digital converters
analog-to-digital converters
contrast
TV camera
37. Computers operate from ____ ____ language.
peripherals
binary machine
matrix
pixel size
38. In what time period did microchip technology come out?
number of values displayed per image side
1960s
1-2 lp/mm
program
39. What is the 'noisiest' component of a digital system?
peripherals
gray scale bit depth
TV camera
numerical value
40. What is the measure of the differences between the data values referred to as?
inversely
pixel
contrast
IRs
41. What is the random background information that does not contribute to the image quality?
0 - 1
noise
low
decrease
42. What is the information stored as magnetic variations referred to as?
memory
1000+
magnetic tape
bus speed
43. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
little
200 - 500-1000
scanning
Input devices
44. Computer programs are called what?
byte
software
progressive scanning
TV camera
45. What 3 things were required prior to digital computer applications in medical imaging?
mathematical theory - solid-state electronics - and microchip technology
signal-to-noise ratio
edge enhancement filtering or sharpening
abacus
46. What does a 0 in binary code stand for?
DICOM standard
1945
numerical values
off
47. What is high-pass filtering also called?
edge enhancement filtering or sharpening
IRs
peripherals
read memory
48. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
band-pass filtering
contrast
Fourier Transformation
49. When subject contrast is high - the acquired data contrast will be ____.
high
slow scanning
write memory
abacus
50. 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.
high-pass filtering
two
greater
signal-to-noise ratio
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