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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. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
contrast
low-pass filter
progressive scanning
CT and MRI
2. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
window
computers
frequency
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?
bus
band-pass filtering
filtering
digital image
4. When detectors acquire their information through ____ they are receiving all the info at once.
digital computers
array detection
window
frequency - contrast - and noise
5. The quality of the data acquired from the IR is measured by what three data characteristics?
matrix size
frequency - contrast - and noise
electronic sources
200 - 500-1000
6. The human visual range is ___ or fewer shades of gray.
high-pass filtering
scanning or array detection
32
RAM - ROM
7. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
mathematical theory - solid-state electronics - and microchip technology
RAM - ROM
on
peripherals
8. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
CT and MRI
transverse - sagittal - and coronal
raster scan pattern
hardware
9. Which memory replaces new information with the old; can change?
write memory
DICOM standard
electronic sources
bit
10. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
window
1970s-1990s
Fourier Transformation
parallel - serial
11. What is the name of the 'modern electronic computer'?
Fourier Transformation
frequency
voxel
ENIAC
12. 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
computer - radiographer
CT and MRI
low-pass filter
13. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
CD or DVD
off
computer - radiographer
14. 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?
band-pass filtering
window width
program
10 megabyte
15. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
parallel - serial
analog computers
electronic sources
16. A low contrast image has a ___ frequency.
1945
low
fine
smaller
17. What permit input/output of information to or from the CPU?
1940s
numerical values
fine
peripherals
18. What is the 'heart' of every computer?
1945
bus speed
noise
central processing unit
19. What does a 0 in binary code stand for?
2^x
programs and data
software
off
20. What changes the pixel value by addition or subtraction and controls image density?
window level
edge enhancement filtering or sharpening
contrast
smoothing
21. Window width and contrast have an ____ relationship.
ROM
shades of gray
array processors
inverse
22. Computer memory is often rated in terms of total ____ memory.
little
frequency - contrast - and noise
byte
IR
23. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
low-pass filter
high-pass filtering
frequency - contrast - and noise
24. What changes the pixel value by multiplication or division and controls image contrast?
hardware
mathematical theory - solid-state electronics - and microchip technology
array detection
window width
25. What is the random background information that does not contribute to the image quality?
window level
low-pass - band-pass - and high-pass
noise
1-2 lp/mm
26. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
low-pass filter
numerical values
off
voxel
27. What is a square series of boxes that gives form to the image?
32
matrix
detector
2^x
28. What is the 'noisiest' component of a digital system?
progressive scanning
TV camera
window width
32
29. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
read memory
TV camera
decrease
30. What are devices that process information?
computers
bus speed
central processing unit
high
31. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
1970s-1990s
window width
digital computers
Input devices
32. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
smoothing
transverse - sagittal - and coronal
decreased
Input devices
33. Modalities differ in bit depth that is available depending on the capabilities of what?
RAM - ROM
bandwidth
slow scanning
IR
34. In what time period did microchip technology come out?
monitors and printers
1960s
1970s-1990s
programs and data
35. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
IRs
high
health level 7
36. What does a 1 in binary code stand for?
digital computers
on
raster scan pattern
analog-to-digital converters
37. The _____ the matrix size - the better the resolution.
window
greater
0 - 1
binary machine
38. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
filtering
detector
low
program
39. Computers operate from ____ ____ language.
program
Input devices
1-2 lp/mm
binary machine
40. In what time period did microchip technology come out?
bus
1960s
signal-to-noise ratio
DICOM standard
41. What type of memory storage devices are required for large amounts of data?
raster scan pattern
CD or DVD
health level 7
peripherals
42. What is the equation for determining gray scale bit depth?
gray scale bit depth
memory
matrix
2^x
43. 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?
bus
software
IR
array processors
44. 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?
binary machine
Fourier Transformation
data
health level 7
45. What is required for collection of input information?
detector
IRs
programs and data
1970s-1990s
46. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
high
32
high
47. Around what time did digital computerization come out for CT and US?
bus
1970s-1990s
noise
high
48. What is the name for an 8-bit word?
low-pass - band-pass - and high-pass
software
byte
TV camera
49. What is the raw data to which a Fourier Transformation is applied to create the digital image?
200 - 500-1000
parallel - serial
frequency
2^x
50. Fluoroscopic noise mostly comes from what?
electronic sources
bus
decreased
signal-to-noise ratio