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Test your basic knowledge |
Digital Image Processing
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Study First
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. Digitalization of analog information (increases / reduces) the quality and quantity of information?
voltage
reduces
scanning
accentuates or suppresses
2. What is the measure of the differences between the data values referred to as?
peripherals
contrast
frequency
matrix
3. Computer programs are called what?
IR
1940s
digital image
software
4. A __ _____ disk will store over 10000000 bytes of information.
progressive scanning
central processing unit
10 megabyte
large amount
5. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
ENIAC
bit
edge enhancement filtering or sharpening
6. What is the equation for determining gray scale bit depth?
2^x
bit
high-pass filtering
1940s
7. What is the measure of the differences between the data values referred to as?
pixel size
contrast
smoothing
gray scale bit depth
8. When detectors acquire their information by ____ they are receiving info from a specific area.
accentuates or suppresses
scanning
pixel
ENIAC
9. What is the primary limitation with the resolution on digital images?
raster scan pattern
mathematical theory - solid-state electronics - and microchip technology
off
numerical values
10. 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?
DICOM standard
band-pass filtering
memory
analog computers
11. There is a ___ relationship between subject contrast and acquired data contrast.
high
peripherals
direct
voltage
12. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
edge enhancement filtering or sharpening
1000+
peripherals
voltage
13. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
peripherals
increase
smoothing
14. What is the 'noisiest' component of a digital system?
window width
TV camera
abacus
ROM
15. Window width and contrast have an ____ relationship.
TV camera
Fourier Transformation
inverse
32
16. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
array processors
Fourier Transformation
matrix
17. A high S/N indicates ___ noise in the image.
ENIAC
little
0 - 1
DICOM standard
18. Which memory replaces new information with the old; can change?
1960s
write memory
fine
high
19. In what time period did microchip technology come out?
high-pass filtering
bandwidth
digital image
1960s
20. The ____ is the heart of the computer while the ___ is the vessels.
low-pass filter
Input devices
analog-to-digital converters
CPU - Bus
21. What was the earliest computer device called?
array detection
increase
32
abacus
22. What determines resolution?
monitors and printers
pixel size
digital computers
frequency
23. What type of memory storage devices are required for large amounts of data?
contrast
digital computers
CD or DVD
monitors and printers
24. 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
1-2 lp/mm
noise
bus speed
25. 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.
on
Fourier Transformation
10 megabyte
0 - 1
26. Computerized digital images are described in terms of what
number of values displayed per image side
peripherals
large amount
fine
27. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
Fourier Transformation
parallel - serial
IRs
28. The human visual range is ___ or fewer shades of gray.
scanning or array detection
Fourier Transformation
32
monitors and printers
29. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
2^x
software
on
30. When detectors acquire their information by ____ they are receiving info from a specific area.
DICOM standard
2^x
scanning
memory
31. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
window level
accentuates or suppresses
byte
magnetic tape
32. When subject contrast is high - the acquired data contrast will be ____.
analog-to-digital converters
hardware
data
high
33. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
bandwidth
bus
ROM
byte
34. What modalities are array processors useful for?
2^x
memory
CT and MRI
CPU - Bus
35. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
decrease
array detection
binary machine
Input devices
36. Which memory replaces new information with the old; can change?
smoothing
CT and MRI
write memory
program
37. The human visual range is ___ or fewer shades of gray.
1-2 lp/mm
hardware
32
gray scale bit depth
38. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
low-pass - band-pass - and high-pass
voxel
central processing unit
on
39. What are the two ways detectors acquire information?
decreased
ROM
large amount
scanning or array detection
40. What 3 things were required prior to digital computer applications in medical imaging?
Fourier Transformation
central processing unit
bus
mathematical theory - solid-state electronics - and microchip technology
41. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
voxel
read memory
byte
noise
42. What can memory be transferred as?
voltage
frequency
detector
off
43. Which computers handle data composed of definite quantities of current?
smoothing
programs and data
TV camera
digital computers
44. What directs information to and from various parts of the computer?
frequency - contrast - and noise
central processing unit
RAM - ROM
hardware
45. What is required for collection of input information?
detector
expansion or compression
transverse - sagittal - and coronal
software
46. In what time period did microchip technology come out?
1960s
matrix
direct
matrix
47. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
filtering
RAM
binary machine
32
48. What type of scanning increases resolution but can't be used in real-time dynamic studies?
analog computers
slow scanning
filtering
on
49. What are devices that process information?
ROM
magnetic tape
abacus
computers
50. Computer programs are called what?
scanning
software
little
analog computers
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