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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. Medical imaging is often achieved from information that has been processed by what?
filtering
array detection
frequency
analog-to-digital converters
2. What is high-pass filtering also called?
bandwidth
bandwidth
analog-to-digital converters
edge enhancement filtering or sharpening
3. 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?
slow scanning
band-pass filtering
bandwidth
window level
4. What are devices that process information?
analog-to-digital converters
computers
on
matrix size
5. What is the random background information that does not contribute to the image quality?
mathematical theory - solid-state electronics - and microchip technology
2^x
noise
health level 7
6. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
little
analog computers
scanning
7. The computer either ____ or ____ selected frequencies during the filtering process.
central processing unit
filtering
analog computers
accentuates or suppresses
8. What is high-pass filtering also called?
software
edge enhancement filtering or sharpening
shades of gray
Input devices
9. All medical imaging is achieved with which type of computers?
digital computers
software
central processing unit
abacus
10. What determines resolution?
numerical values
pixel size
gray scale bit depth
large amount
11. Which computers handle data composed of definite quantities of current?
binary machine
software
low
digital computers
12. What does a 1 in binary code stand for?
central processing unit
smaller
on
detector
13. Modalities differ in bit depth that is available depending on the capabilities of what?
IR
little
window width
10 megabyte
14. What are the two ways detectors acquire information?
computers
shades of gray
bit
scanning or array detection
15. When was ENIAC invented?
frequency
decrease
detector
1945
16. What is the mathematical algorithm used to create all medical images?
high
numerical value
Fourier Transformation
2^x
17. What type of scanning increases resolution but can't be used in real-time dynamic studies?
high-pass filtering
low-pass filter
slow scanning
bandwidth
18. Increased noise = _____ image contrast.
decreased
fine
inversely
parallel - serial
19. Modalities differ in bit depth that is available depending on the capabilities of what?
frequency - contrast - and noise
abacus
high
IR
20. Which computers handle data composed of definite quantities of current?
slow scanning
digital computers
progressive scanning
32
21. What type of memory storage devices are required for large amounts of data?
0 - 1
smoothing
CD or DVD
shades of gray
22. What does a 1 in binary code stand for?
digital computers
on
TV camera
gray scale bit depth
23. Computer memory is often rated in terms of total ____ memory.
byte
bandwidth
peripherals
central processing unit
24. The quality of the data acquired from the IR is measured by what three data characteristics?
progressive scanning
peripherals
frequency - contrast - and noise
signal-to-noise ratio
25. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
central processing unit
frequency - contrast - and noise
low-pass filter
abacus
26. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
IRs
voltage
fine
2^x
27. Computer memory is often rated in terms of total ____ memory.
array processors
write memory
byte
peripherals
28. Computer equipment is called what?
1940s
software
hardware
parallel - serial
29. Binary systems operate with a ___-symbol language.
off
1945
two
Input devices
30. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
software
RAM - ROM
write memory
electronic sources
31. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
computer - radiographer
TV camera
Fourier Transformation
array processors
32. What was the earliest computer device called?
1960s
high-pass filtering
abacus
computer - radiographer
33. If the window level increases - density will _____.
increase
IR
peripherals
voltage
34. If the window level increases - density will _____.
CD or DVD
increase
direct
computers
35. What are the two types of information computers use?
programs and data
2^x
CPU - Bus
array detection
36. Which memory can only be extracted without alteration; cannot change?
1-2 lp/mm
hardware
read memory
1000+
37. Which memory can only be extracted without alteration; cannot change?
read memory
reduces
pixel size
frequency - contrast - and noise
38. The _____ the matrix size - the better the resolution.
byte
greater
bus speed
numerical value
39. Noise is measured as what?
signal-to-noise ratio
mathematical theory - solid-state electronics - and microchip technology
high
peripherals
40. Computers operate from ____ ____ language.
binary machine
numerical value
two
greater
41. What is the random background information that does not contribute to the image quality?
electronic sources
noise
10 megabyte
CD or DVD
42. When subject contrast is high - the acquired data contrast will be ____.
signal-to-noise ratio
write memory
bandwidth
high
43. What directs information to and from various parts of the computer?
central processing unit
1940s
inversely
computer - radiographer
44. What input device do radiographers use on a normal basis?
contrast
IRs
number of values displayed per image side
central processing unit
45. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
parallel - serial
low-pass filter
RAM - ROM
46. A high S/N indicates ___ noise in the image.
Fourier Transformation
numerical value
digital imaging and communication in medicine
little
47. Which type of information consists of collected facts?
peripherals
data
filtering
1970s-1990s
48. Around what time did digital computerization come out for CT and US?
direct
IRs
1970s-1990s
smaller
49. 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?
mathematical theory - solid-state electronics - and microchip technology
DICOM standard
accentuates or suppresses
bit
50. What are the two most common output devices?
window width
monitors and printers
byte
detector