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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. All medical imaging is achieved with which type of computers?
10 megabyte
1940s
direct
digital computers
2. What is the name for an 8-bit word?
central processing unit
high
DICOM standard
byte
3. The computer either ____ or ____ selected frequencies during the filtering process.
array detection
raster scan pattern
accentuates or suppresses
window level
4. In what time period did microchip technology come out?
read memory
2^x
1960s
mathematical theory - solid-state electronics - and microchip technology
5. What changes the pixel value by multiplication or division and controls image contrast?
mathematical theory - solid-state electronics - and microchip technology
window width
array processors
0 - 1
6. What are the two types of information computers use?
ENIAC
digital image
fine
programs and data
7. What permit input/output of information to or from the CPU?
1940s
peripherals
CT and MRI
digital computers
8. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
1945
progressive scanning
200 - 500-1000
9. Noise is measured as what?
high
digital imaging and communication in medicine
signal-to-noise ratio
1960s
10. What are the two types of information computers use?
peripherals
detector
electronic sources
programs and data
11. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
health level 7
window level
bus
little
12. 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?
noise
high
digital computers
bus
13. What is an individual matrix box or picture element?
matrix
pixel
inversely
read memory
14. Which type of information consists of operating instructions?
DICOM standard
program
greater
32
15. There is a ___ relationship between subject contrast and acquired data contrast.
CD or DVD
array processors
direct
progressive scanning
16. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
increase
window level
shades of gray
17. Around what time did digital computerization come out for CT and US?
two
signal-to-noise ratio
analog-to-digital converters
1970s-1990s
18. What type of memory storage devices are required for large amounts of data?
window width
scanning
magnetic tape
CD or DVD
19. What is required for collection of input information?
detector
window level
peripherals
raster scan pattern
20. If the window level increases - density will _____.
memory
increase
program
ENIAC
21. 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?
memory
inverse
analog computers
transverse - sagittal - and coronal
22. A larger matrix provides ____ pixels.
smaller
scanning or array detection
fine
RAM
23. Modalities differ in bit depth that is available depending on the capabilities of what?
computers
abacus
1960s
IR
24. What is the equation for determining gray scale bit depth?
1000+
programs and data
expansion or compression
2^x
25. When was ENIAC invented?
digital computers
software
write memory
1945
26. Each pixel is capable of representing a wide range of what?
shades of gray
digital imaging and communication in medicine
frequency
progressive scanning
27. What is an individual matrix box or picture element?
pixel
peripherals
1970s-1990s
ENIAC
28. Which type of information consists of operating instructions?
numerical value
off
program
bus
29. What input device do radiographers use on a normal basis?
matrix size
memory
IRs
high
30. Fluoroscopic noise mostly comes from what?
electronic sources
CT and MRI
filtering
transverse - sagittal - and coronal
31. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
CD or DVD
200 - 500-1000
10 megabyte
software
32. What determines resolution?
pixel size
smaller
transverse - sagittal - and coronal
bus
33. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
hardware
electronic sources
frequency
34. What changes the pixel value by addition or subtraction and controls image density?
bus speed
decreased
scanning
window level
35. A low contrast image has a ___ frequency.
decrease
filtering
raster scan pattern
low
36. 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?
pixel size
1000+
DICOM standard
transverse - sagittal - and coronal
37. The quality of the data acquired from the IR is measured by what three data characteristics?
health level 7
software
increase
frequency - contrast - and noise
38. Changes in window width are sometimes called gray scale ____ or ____.
high-pass filtering
expansion or compression
array detection
bandwidth
39. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
voxel
computers
IRs
fine
40. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
IR
bus
central processing unit
low-pass filter
41. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
voxel
large amount
software
array processors
42. What is the raw data to which a Fourier Transformation is applied to create the digital image?
abacus
frequency
numerical values
off
43. Noise is ____ related to contrast.
inversely
pixel size
digital image
low-pass filter
44. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
pixel
1945
matrix
smoothing
45. What is a square series of boxes that gives form to the image?
digital computers
1945
mathematical theory - solid-state electronics - and microchip technology
matrix
46. What are the two most common output devices?
on
monitors and printers
bus
CD or DVD
47. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
progressive scanning
RAM - ROM
ENIAC
48. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
Fourier Transformation
peripherals
signal-to-noise ratio
2^x
49. What permit input/output of information to or from the CPU?
peripherals
digital imaging and communication in medicine
direct
inverse
50. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
Input devices
filtering
central processing unit
1945