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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. What is required for collection of input information?
on
CD or DVD
detector
scanning
2. Changes in window width are sometimes called gray scale ____ or ____.
DICOM standard
200 - 500-1000
fine
expansion or compression
3. What does a 0 in binary code stand for?
off
high-pass filtering
window level
mathematical theory - solid-state electronics - and microchip technology
4. If the window level increases - density will _____.
increase
smaller
numerical value
on
5. What is the name of the 'modern electronic computer'?
programs and data
analog-to-digital converters
ENIAC
smoothing
6. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
1945
low-pass - band-pass - and high-pass
32
7. Which type of information consists of collected facts?
smaller
1-2 lp/mm
data
program
8. What is the name for a binary digit?
digital image
bit
high-pass filtering
filtering
9. What changes the pixel value by multiplication or division and controls image contrast?
gray scale bit depth
digital computers
pixel size
window width
10. If window width increases - image contrast will ____.
inverse
decrease
pixel
peripherals
11. Which computers handle data composed of continuously varying electrical currents?
analog computers
greater
32
low-pass - band-pass - and high-pass
12. Which computers handle data composed of definite quantities of current?
CT and MRI
digital computers
matrix
central processing unit
13. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
peripherals
byte
window width
magnetic tape
14. Fluoroscopic noise mostly comes from what?
electronic sources
central processing unit
central processing unit
greater
15. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
matrix size
analog computers
peripherals
RAM
16. Which computers handle data composed of definite quantities of current?
digital computers
RAM - ROM
memory
digital image
17. Binary systems operate with a ___-symbol language.
CT and MRI
expansion or compression
1960s
two
18. What 3 things were required prior to digital computer applications in medical imaging?
accentuates or suppresses
mathematical theory - solid-state electronics - and microchip technology
bus
DICOM standard
19. Which type of information consists of collected facts?
smaller
detector
data
computers
20. Modalities differ in bit depth that is available depending on the capabilities of what?
computers
shades of gray
1940s
IR
21. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.
RAM - ROM
inverse
decreased
window
22. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
direct
pixel
32
200 - 500-1000
23. What are devices that process information?
voltage
on
1-2 lp/mm
computers
24. Noise is ____ related to contrast.
2^x
inversely
program
high
25. A __ _____ disk will store over 10000000 bytes of information.
10 megabyte
software
health level 7
little
26. 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.
inverse
software
0 - 1
peripherals
27. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
smaller
decrease
Input devices
monitors and printers
28. 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?
digital computers
DICOM standard
bit
expansion or compression
29. What are devices that process information?
raster scan pattern
scanning or array detection
off
computers
30. Resolution is controlled by what?
high
inversely
matrix size
programs and data
31. Computer equipment is called what?
signal-to-noise ratio
low-pass filter
hardware
digital imaging and communication in medicine
32. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
smoothing
data
hardware
33. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
scanning
CPU - Bus
large amount
Fourier Transformation
34. What type of memory storage devices are required for large amounts of data?
CD or DVD
peripherals
1945
on
35. Digitalization of analog information (increases / reduces) the quality and quantity of information?
array processors
pixel
reduces
2^x
36. The _____ the matrix size - the better the resolution.
scanning or array detection
bit
greater
software
37. What is the random background information that does not contribute to the image quality?
noise
detector
voltage
magnetic tape
38. What is the primary limitation with the resolution on digital images?
IR
raster scan pattern
memory
IRs
39. What is high-pass filtering also called?
filtering
byte
1000+
edge enhancement filtering or sharpening
40. Which memory can only be extracted without alteration; cannot change?
1970s-1990s
inversely
raster scan pattern
read memory
41. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
detector
numerical value
low-pass filter
RAM - ROM
42. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.
peripherals
signal-to-noise ratio
digital image
window
43. When detectors acquire their information by ____ they are receiving info from a specific area.
transverse - sagittal - and coronal
electronic sources
scanning
2^x
44. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
inverse
numerical value
slow scanning
1-2 lp/mm
45. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
1940s
numerical value
magnetic tape
expansion or compression
46. All medical imaging is achieved with which type of computers?
off
bandwidth
digital computers
numerical value
47. Window width and contrast have an ____ relationship.
digital computers
parallel - serial
inverse
read memory
48. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
10 megabyte
frequency - contrast - and noise
high-pass filtering
49. What is an individual matrix box or picture element?
digital computers
bus
pixel
smoothing
50. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
signal-to-noise ratio
CT and MRI
two