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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. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
monitors and printers
low-pass filter
detector
2. What permit input/output of information to or from the CPU?
array processors
peripherals
1940s
32
3. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
edge enhancement filtering or sharpening
programs and data
smoothing
4. Digitalization of analog information (increases / reduces) the quality and quantity of information?
digital computers
high
IRs
reduces
5. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?
read memory
inversely
mathematical theory - solid-state electronics - and microchip technology
DICOM standard
6. Computer memory is often rated in terms of total ____ memory.
ROM
byte
Fourier Transformation
CT and MRI
7. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
array processors
reduces
raster scan pattern
fine
8. What is a square series of boxes that gives form to the image?
10 megabyte
expansion or compression
matrix
analog computers
9. 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?
array processors
health level 7
200 - 500-1000
low-pass filter
10. What type of memory storage devices are required for large amounts of data?
matrix size
bus speed
CD or DVD
computers
11. Modalities differ in bit depth that is available depending on the capabilities of what?
32
low-pass filter
IR
binary machine
12. In what time period did microchip technology come out?
byte
1960s
voltage
array detection
13. What determines resolution?
pixel size
peripherals
TV camera
inverse
14. What type of scanning increases resolution slightly by scanning all 525 lines in order?
ROM
high
progressive scanning
bus speed
15. What type of scanning increases resolution but can't be used in real-time dynamic studies?
1940s
accentuates or suppresses
slow scanning
number of values displayed per image side
16. What is the mathematical algorithm used to create all medical images?
CD or DVD
central processing unit
mathematical theory - solid-state electronics - and microchip technology
Fourier Transformation
17. What directs information to and from various parts of the computer?
central processing unit
slow scanning
decrease
Input devices
18. Which type of information consists of collected facts?
data
analog-to-digital converters
1970s-1990s
central processing unit
19. A low contrast image has a ___ frequency.
1000+
little
low
increase
20. What does DICOM stand for?
numerical values
digital imaging and communication in medicine
central processing unit
32
21. All medical imaging is achieved with which type of computers?
digital imaging and communication in medicine
detector
health level 7
digital computers
22. What type of scanning increases resolution slightly by scanning all 525 lines in order?
fine
progressive scanning
mathematical theory - solid-state electronics - and microchip technology
voltage
23. What is the 'noisiest' component of a digital system?
RAM - ROM
TV camera
mathematical theory - solid-state electronics - and microchip technology
1945
24. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
program
1970s-1990s
computer - radiographer
bus
25. What does a 0 in binary code stand for?
matrix
off
CD or DVD
binary machine
26. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
edge enhancement filtering or sharpening
RAM
TV camera
direct
27. What does a 1 in binary code stand for?
on
programs and data
pixel
smaller
28. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
decrease
shades of gray
on
1-2 lp/mm
29. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
CT and MRI
decreased
200 - 500-1000
smoothing
30. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
Fourier Transformation
TV camera
RAM - ROM
inverse
31. In what time period did microchip technology come out?
1960s
frequency
monitors and printers
CD or DVD
32. What are devices that process information?
computers
signal-to-noise ratio
window level
read memory
33. 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?
direct
computer - radiographer
array processors
transverse - sagittal - and coronal
34. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
matrix
slow scanning
CPU - Bus
array processors
35. What is an individual matrix box or picture element?
electronic sources
two
pixel
off
36. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
bus speed
low-pass filter
low
data
37. What is the frequency response of the incoming signal called?
inverse
digital imaging and communication in medicine
bandwidth
progressive scanning
38. If window width increases - image contrast will ____.
1940s
digital image
software
decrease
39. What is critical to how fast the computer system can function?
2^x
frequency
number of values displayed per image side
bus speed
40. What is required for collection of input information?
write memory
detector
matrix
1000+
41. In what time period did mathematical theory and solid-state electronics come out?
RAM
voltage
1940s
matrix
42. What is high-pass filtering also called?
1970s-1990s
computer - radiographer
central processing unit
edge enhancement filtering or sharpening
43. What are the two types of information computers use?
fine
Input devices
high
programs and data
44. 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
greater
Fourier Transformation
numerical values
45. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
frequency
magnetic tape
peripherals
46. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
frequency
TV camera
parallel - serial
200 - 500-1000
47. What are the two ways detectors acquire information?
IR
scanning or array detection
digital computers
slow scanning
48. What is critical to how fast the computer system can function?
computers
bus speed
frequency - contrast - and noise
byte
49. Around what time did digital computerization come out for CT and US?
shades of gray
frequency - contrast - and noise
data
1970s-1990s
50. Noise is ____ related to contrast.
inversely
parallel - serial
0 - 1
number of values displayed per image side