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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. Computers operate from ____ ____ language.
matrix
signal-to-noise ratio
binary machine
decrease
2. Resolution is controlled by what?
data
matrix size
expansion or compression
transverse - sagittal - and coronal
3. What is the primary limitation with the resolution on digital images?
raster scan pattern
large amount
ENIAC
1970s-1990s
4. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
off
large amount
bus speed
analog computers
5. A __ _____ disk will store over 10000000 bytes of information.
two
byte
mathematical theory - solid-state electronics - and microchip technology
10 megabyte
6. What is critical to how fast the computer system can function?
bus speed
edge enhancement filtering or sharpening
10 megabyte
raster scan pattern
7. There is a ___ relationship between subject contrast and acquired data contrast.
array detection
direct
inverse
off
8. The _____ the matrix size - the better the resolution.
reduces
filtering
greater
0 - 1
9. When detectors acquire their information through ____ they are receiving all the info at once.
peripherals
transverse - sagittal - and coronal
bus
array detection
10. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
CPU - Bus
analog computers
noise
11. If window width increases - image contrast will ____.
filtering
increase
edge enhancement filtering or sharpening
decrease
12. What does a 0 in binary code stand for?
off
DICOM standard
health level 7
window
13. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
smoothing
matrix size
array processors
progressive scanning
14. What modalities are array processors useful for?
ROM
CT and MRI
little
low
15. When subject contrast is high - the acquired data contrast will be ____.
1000+
CPU - Bus
2^x
high
16. Medical imaging is often achieved from information that has been processed by what?
greater
ROM
analog-to-digital converters
band-pass filtering
17. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
gray scale bit depth
electronic sources
magnetic tape
high-pass filtering
18. What are the two most common output devices?
monitors and printers
digital image
TV camera
computers
19. What permit input/output of information to or from the CPU?
TV camera
peripherals
voxel
pixel
20. When was ENIAC invented?
1945
digital computers
programs and data
little
21. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
pixel
digital image
voxel
RAM
22. Computer memory is often rated in terms of total ____ memory.
DICOM standard
window level
byte
fine
23. What is the information stored as magnetic variations referred to as?
digital computers
shades of gray
ROM
memory
24. What is the raw data to which a Fourier Transformation is applied to create the digital image?
off
ROM
frequency
matrix
25. Digitalization of analog information (increases / reduces) the quality and quantity of information?
matrix
electronic sources
reduces
peripherals
26. Computer equipment is called what?
bus
bandwidth
hardware
array detection
27. In what time period did mathematical theory and solid-state electronics come out?
read memory
progressive scanning
digital image
1940s
28. What provides specific instructions for calculations and sequential steps to be followed?
peripherals
software
2^x
inverse
29. A high contrast image has a ___ frequency.
RAM - ROM
central processing unit
off
high
30. What is an image that has been converted into numerical values for transmission or processing?
data
digital image
reduces
1945
31. The computer either ____ or ____ selected frequencies during the filtering process.
abacus
memory
accentuates or suppresses
monitors and printers
32. The ____ is the heart of the computer while the ___ is the vessels.
0 - 1
low-pass filter
analog computers
CPU - Bus
33. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
contrast
digital computers
digital computers
34. Modalities differ in bit depth that is available depending on the capabilities of what?
direct
filtering
peripherals
IR
35. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
2^x
1945
detector
RAM
36. Which type of information consists of collected facts?
data
peripherals
byte
noise
37. What can memory be transferred as?
1945
voltage
200 - 500-1000
numerical values
38. What is the frequency response of the incoming signal called?
2^x
bandwidth
CT and MRI
matrix
39. 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?
bandwidth
transverse - sagittal - and coronal
data
two
40. Around what time did digital computerization come out for CT and US?
1-2 lp/mm
inversely
window level
1970s-1990s
41. Changes in window width are sometimes called gray scale ____ or ____.
byte
expansion or compression
memory
window level
42. What are the two types of information computers use?
window level
computer - radiographer
programs and data
noise
43. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
CT and MRI
bus
IRs
contrast
44. What provides specific instructions for calculations and sequential steps to be followed?
1945
software
health level 7
1960s
45. What can memory be transferred as?
10 megabyte
voltage
magnetic tape
pixel
46. What permit input/output of information to or from the CPU?
numerical values
peripherals
RAM - ROM
low-pass - band-pass - and high-pass
47. Computerized digital images are described in terms of what
RAM
number of values displayed per image side
progressive scanning
shades of gray
48. What is the random background information that does not contribute to the image quality?
1-2 lp/mm
noise
32
digital image
49. What type of scanning increases resolution slightly by scanning all 525 lines in order?
byte
IRs
progressive scanning
window
50. What are devices that process information?
window
computers
greater
low-pass - band-pass - and high-pass