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Test your basic knowledge |
Digital Image Processing
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Subject
:
engineering
Instructions:
Answer 50 questions in 15 minutes.
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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. Who or What is responsible for density changes on a digital image? On a manual image
bandwidth
mathematical theory - solid-state electronics - and microchip technology
computer - radiographer
array detection
2. What is the random background information that does not contribute to the image quality?
window level
bus speed
IRs
noise
3. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
inversely
matrix size
IR
filtering
4. The number of shades of gray is determined by what?
raster scan pattern
smaller
gray scale bit depth
noise
5. What modalities are array processors useful for?
10 megabyte
write memory
CT and MRI
DICOM standard
6. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
magnetic tape
bus speed
fine
7. A high S/N indicates ___ noise in the image.
edge enhancement filtering or sharpening
magnetic tape
little
health level 7
8. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
program
fine
window level
peripherals
9. The quality of the data acquired from the IR is measured by what three data characteristics?
CT and MRI
edge enhancement filtering or sharpening
frequency - contrast - and noise
Fourier Transformation
10. What is critical to how fast the computer system can function?
memory
direct
1945
bus speed
11. Binary systems operate with a ___-symbol language.
byte
analog-to-digital converters
two
DICOM standard
12. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
edge enhancement filtering or sharpening
1940s
1970s-1990s
13. Which computers handle data composed of definite quantities of current?
array detection
IR
digital computers
band-pass filtering
14. What can memory be transferred as?
voltage
digital computers
decreased
RAM - ROM
15. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
computer - radiographer
1000+
ROM
monitors and printers
16. 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?
digital computers
digital image
health level 7
scanning or array detection
17. What changes the pixel value by addition or subtraction and controls image density?
RAM - ROM
computer - radiographer
monitors and printers
window level
18. Digital detectors are capable of producing ______ shades of gray.
1000+
gray scale bit depth
ENIAC
peripherals
19. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
progressive scanning
window level
edge enhancement filtering or sharpening
20. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
frequency
200 - 500-1000
progressive scanning
array processors
21. What is the equation for determining gray scale bit depth?
2^x
1970s-1990s
on
progressive scanning
22. What are the two most common output devices?
program
hardware
monitors and printers
band-pass filtering
23. Computer programs are called what?
200 - 500-1000
software
monitors and printers
increase
24. 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.
Input devices
0 - 1
central processing unit
increase
25. The _____ the matrix size - the better the resolution.
CD or DVD
32
window width
greater
26. In what time period did microchip technology come out?
window
transverse - sagittal - and coronal
expansion or compression
1960s
27. What is a square series of boxes that gives form to the image?
matrix
greater
10 megabyte
1940s
28. If window width increases - image contrast will ____.
decrease
parallel - serial
noise
IRs
29. Each pixel is capable of representing a wide range of what?
shades of gray
window width
smoothing
expansion or compression
30. Which memory replaces new information with the old; can change?
write memory
ROM
1-2 lp/mm
Fourier Transformation
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
decreased
transverse - sagittal - and coronal
parallel - serial
32. Around what time did digital computerization come out for CT and US?
software
1970s-1990s
greater
CD or DVD
33. What is the 'noisiest' component of a digital system?
high-pass filtering
on
TV camera
1000+
34. What is the raw data to which a Fourier Transformation is applied to create the digital image?
Input devices
progressive scanning
frequency
digital computers
35. There is a ___ relationship between subject contrast and acquired data contrast.
direct
decreased
TV camera
signal-to-noise ratio
36. When detectors acquire their information through ____ they are receiving all the info at once.
hardware
array detection
1000+
CPU - Bus
37. What is the mathematical algorithm used to create all medical images?
mathematical theory - solid-state electronics - and microchip technology
central processing unit
Fourier Transformation
window
38. What are the two most common output devices?
matrix
Fourier Transformation
monitors and printers
high
39. If the window level increases - density will _____.
write memory
byte
signal-to-noise ratio
increase
40. A low contrast image has a ___ frequency.
filtering
low
Input devices
band-pass filtering
41. 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?
TV camera
10 megabyte
bus
decrease
42. Which computers handle data composed of continuously varying electrical currents?
analog computers
1970s-1990s
inverse
off
43. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
noise
program
digital computers
44. When detectors acquire their information through ____ they are receiving all the info at once.
digital computers
ROM
array detection
digital imaging and communication in medicine
45. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
computer - radiographer
electronic sources
binary machine
parallel - serial
46. What is an image that has been converted into numerical values for transmission or processing?
bit
bit
expansion or compression
digital image
47. 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?
computers
two
increase
band-pass filtering
48. 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?
transverse - sagittal - and coronal
CT and MRI
peripherals
TV camera
49. A high contrast image has a ___ frequency.
binary machine
high
monitors and printers
decreased
50. What is the mathematical algorithm used to create all medical images?
data
Fourier Transformation
10 megabyte
direct
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