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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. What does a 1 in binary code stand for?
window width
on
two
edge enhancement filtering or sharpening
2. What is the name of the 'modern electronic computer'?
ENIAC
ROM
on
matrix
3. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
2^x
Input devices
array processors
health level 7
4. What is required for collection of input information?
1960s
digital image
1000+
detector
5. What is required for collection of input information?
low
decrease
health level 7
detector
6. 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?
parallel - serial
band-pass filtering
low
signal-to-noise ratio
7. Computer memory is often rated in terms of total ____ memory.
parallel - serial
greater
byte
band-pass filtering
8. What is the measure of the differences between the data values referred to as?
CPU - Bus
contrast
digital computers
2^x
9. What type of scanning increases resolution slightly by scanning all 525 lines in order?
raster scan pattern
digital image
window width
progressive scanning
10. What is the raw data to which a Fourier Transformation is applied to create the digital image?
slow scanning
noise
frequency
bandwidth
11. What can memory be transferred as?
electronic sources
CD or DVD
filtering
voltage
12. What does DICOM stand for?
contrast
digital imaging and communication in medicine
1970s-1990s
bit
13. Which type of information consists of operating instructions?
program
smoothing
abacus
1000+
14. What are the 3 classifications of digitized image filters?
decrease
high
1940s
low-pass - band-pass - and high-pass
15. What is the equation for determining gray scale bit depth?
2^x
Input devices
TV camera
progressive scanning
16. If window width increases - image contrast will ____.
decrease
abacus
band-pass filtering
memory
17. What input device do radiographers use on a normal basis?
Input devices
IRs
DICOM standard
low-pass filter
18. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
low-pass filter
voltage
matrix size
ENIAC
19. Digital detectors are capable of producing ______ shades of gray.
1000+
decreased
analog computers
1970s-1990s
20. When subject contrast is high - the acquired data contrast will be ____.
byte
high
RAM
little
21. Computerized digital images are described in terms of what
bus
electronic sources
number of values displayed per image side
array processors
22. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
CPU - Bus
bus
low-pass - band-pass - and high-pass
parallel - serial
23. What 3 things were required prior to digital computer applications in medical imaging?
IR
inversely
mathematical theory - solid-state electronics - and microchip technology
bit
24. Binary systems operate with a ___-symbol language.
digital imaging and communication in medicine
binary machine
two
window level
25. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
voxel
RAM
RAM - ROM
bus
26. Medical imaging is often achieved from information that has been processed by what?
little
analog-to-digital converters
byte
DICOM standard
27. When was ENIAC invented?
large amount
central processing unit
memory
1945
28. A high contrast image has a ___ frequency.
smaller
high
frequency - contrast - and noise
ENIAC
29. In what time period did mathematical theory and solid-state electronics come out?
RAM
1940s
edge enhancement filtering or sharpening
reduces
30. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
memory
RAM
software
bandwidth
31. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
voltage
CT and MRI
magnetic tape
large amount
32. 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.
0 - 1
voltage
expansion or compression
computer - radiographer
33. Window width and contrast have an ____ relationship.
numerical value
read memory
electronic sources
inverse
34. Digitalization of analog information (increases / reduces) the quality and quantity of information?
large amount
raster scan pattern
bandwidth
reduces
35. What type of scanning increases resolution but can't be used in real-time dynamic studies?
scanning or array detection
large amount
peripherals
slow scanning
36. 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?
health level 7
central processing unit
window
high
37. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
central processing unit
ENIAC
RAM
smoothing
38. Noise is ____ related to contrast.
inversely
electronic sources
CPU - Bus
two
39. Which computers handle data composed of definite quantities of current?
1000+
analog-to-digital converters
number of values displayed per image side
digital computers
40. A high S/N indicates ___ noise in the image.
200 - 500-1000
digital computers
bit
little
41. If the window level increases - density will _____.
mathematical theory - solid-state electronics - and microchip technology
increase
transverse - sagittal - and coronal
window
42. Which memory replaces new information with the old; can change?
1000+
write memory
pixel
RAM - ROM
43. Noise is ____ related to contrast.
computers
inversely
progressive scanning
smaller
44. The number of shades of gray is determined by what?
gray scale bit depth
32
scanning
10 megabyte
45. What are the two types of information computers use?
digital computers
low-pass - band-pass - and high-pass
gray scale bit depth
programs and data
46. The number of shades of gray is determined by what?
data
magnetic tape
gray scale bit depth
central processing unit
47. When detectors acquire their information through ____ they are receiving all the info at once.
greater
digital image
array detection
direct
48. Computers operate from ____ ____ language.
window level
gray scale bit depth
decreased
binary machine
49. Increased noise = _____ image contrast.
byte
smaller
RAM
decreased
50. 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?
mathematical theory - solid-state electronics - and microchip technology
window level
band-pass filtering
high-pass filtering