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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. Changes in window width are sometimes called gray scale ____ or ____.
smoothing
expansion or compression
health level 7
program
2. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
CD or DVD
pixel
peripherals
1970s-1990s
3. What 3 things were required prior to digital computer applications in medical imaging?
edge enhancement filtering or sharpening
progressive scanning
voltage
mathematical theory - solid-state electronics - and microchip technology
4. What is the primary limitation with the resolution on digital images?
numerical value
32
raster scan pattern
numerical values
5. Modalities differ in bit depth that is available depending on the capabilities of what?
high-pass filtering
two
IR
fine
6. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
window width
IR
high
7. 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?
smoothing
bus
1945
signal-to-noise ratio
8. In what time period did microchip technology come out?
signal-to-noise ratio
1960s
TV camera
magnetic tape
9. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
central processing unit
fine
window
data
10. Around what time did digital computerization come out for CT and US?
analog computers
2^x
transverse - sagittal - and coronal
1970s-1990s
11. What does DICOM stand for?
digital imaging and communication in medicine
inverse
scanning
byte
12. Computer programs are called what?
shades of gray
pixel size
program
software
13. What is the name for a binary digit?
bit
abacus
transverse - sagittal - and coronal
central processing unit
14. When was ENIAC invented?
pixel
1945
raster scan pattern
electronic sources
15. Which memory can only be extracted without alteration; cannot change?
array detection
increase
0 - 1
read memory
16. What is critical to how fast the computer system can function?
2^x
bus speed
accentuates or suppresses
parallel - serial
17. Computerized digital images are described in terms of what
number of values displayed per image side
bus
two
memory
18. What type of scanning increases resolution but can't be used in real-time dynamic studies?
little
slow scanning
CD or DVD
byte
19. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
bus
numerical values
shades of gray
bit
20. Digital detectors are capable of producing ______ shades of gray.
1000+
window width
magnetic tape
increase
21. Each pixel is capable of representing a wide range of what?
shades of gray
bus speed
bit
CT and MRI
22. What is the raw data to which a Fourier Transformation is applied to create the digital image?
memory
low-pass filter
frequency
inversely
23. Resolution is controlled by what?
matrix size
data
DICOM standard
RAM - ROM
24. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
electronic sources
bus
low
monitors and printers
25. Which computers handle data composed of definite quantities of current?
pixel
data
digital computers
pixel
26. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
IR
progressive scanning
programs and data
smoothing
27. What is the raw data to which a Fourier Transformation is applied to create the digital image?
data
1945
pixel
frequency
28. 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.
edge enhancement filtering or sharpening
digital computers
window
RAM
29. Noise is ____ related to contrast.
bandwidth
inversely
reduces
matrix size
30. Which type of information consists of collected facts?
high
RAM - ROM
analog computers
data
31. 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
1970s-1990s
mathematical theory - solid-state electronics - and microchip technology
ENIAC
32. What is the equation for determining gray scale bit depth?
high-pass filtering
pixel size
2^x
abacus
33. When was ENIAC invented?
1945
array detection
scanning or array detection
TV camera
34. All medical imaging is achieved with which type of computers?
decreased
low-pass - band-pass - and high-pass
digital computers
frequency - contrast - and noise
35. Computer equipment is called what?
electronic sources
signal-to-noise ratio
hardware
RAM
36. If the window level increases - density will _____.
ROM
little
increase
ROM
37. Noise is measured as what?
signal-to-noise ratio
pixel size
bus
10 megabyte
38. Which type of information consists of collected facts?
low-pass - band-pass - and high-pass
shades of gray
data
ROM
39. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
bus
parallel - serial
smaller
40. What is an individual matrix box or picture element?
inversely
pixel
digital image
high
41. All medical imaging is achieved with which type of computers?
low-pass filter
greater
digital computers
window level
42. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
program
shades of gray
high
43. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
progressive scanning
bus
abacus
44. Digital detectors are capable of producing ______ shades of gray.
window level
band-pass filtering
1000+
memory
45. There is a ___ relationship between subject contrast and acquired data contrast.
DICOM standard
software
bus
direct
46. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
numerical value
number of values displayed per image side
pixel
voxel
47. What is the information stored as magnetic variations referred to as?
digital imaging and communication in medicine
RAM
frequency - contrast - and noise
memory
48. 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
edge enhancement filtering or sharpening
byte
high
49. The computer either ____ or ____ selected frequencies during the filtering process.
decrease
magnetic tape
10 megabyte
accentuates or suppresses
50. Which memory replaces new information with the old; can change?
window
write memory
bus speed
mathematical theory - solid-state electronics - and microchip technology