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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. What is the frequency response of the incoming signal called?
32
bus
bandwidth
frequency
2. In what time period did microchip technology come out?
1960s
computers
program
frequency
3. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
low-pass filter
1970s-1990s
data
number of values displayed per image side
4. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
noise
array detection
array processors
IRs
5. What is an individual matrix box or picture element?
pixel
on
central processing unit
1945
6. Computer programs are called what?
software
digital computers
pixel
digital image
7. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
binary machine
TV camera
peripherals
two
8. Computer equipment is called what?
read memory
software
shades of gray
hardware
9. Computer memory is often rated in terms of total ____ memory.
byte
CPU - Bus
reduces
1945
10. The number of shades of gray is determined by what?
data
pixel size
IRs
gray scale bit depth
11. The quality of the data acquired from the IR is measured by what three data characteristics?
central processing unit
frequency - contrast - and noise
scanning or array detection
low-pass filter
12. What determines resolution?
smoothing
reduces
pixel size
frequency - contrast - and noise
13. Digital detectors are capable of producing ______ shades of gray.
Fourier Transformation
1000+
electronic sources
bus
14. A larger matrix provides ____ pixels.
bandwidth
smaller
decreased
fine
15. What are the two types of information computers use?
RAM - ROM
accentuates or suppresses
programs and data
hardware
16. Modalities differ in bit depth that is available depending on the capabilities of what?
IR
window
array detection
DICOM standard
17. What does a 0 in binary code stand for?
off
digital image
high
analog-to-digital converters
18. When detectors acquire their information by ____ they are receiving info from a specific area.
expansion or compression
numerical values
detector
scanning
19. What is the name of the 'modern electronic computer'?
ENIAC
bus
bus speed
pixel
20. What 3 things were required prior to digital computer applications in medical imaging?
direct
raster scan pattern
mathematical theory - solid-state electronics - and microchip technology
edge enhancement filtering or sharpening
21. What is the name for an 8-bit word?
1945
matrix
scanning or array detection
byte
22. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
analog-to-digital converters
greater
200 - 500-1000
IRs
23. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
32
high
ROM
digital imaging and communication in medicine
24. What are the 3 classifications of digitized image filters?
CPU - Bus
high
low-pass - band-pass - and high-pass
detector
25. Computerized digital images are described in terms of what
little
decreased
parallel - serial
number of values displayed per image side
26. Window width and contrast have an ____ relationship.
1-2 lp/mm
inverse
1940s
expansion or compression
27. What is the name for a binary digit?
band-pass filtering
pixel
bit
1-2 lp/mm
28. Fluoroscopic noise mostly comes from what?
electronic sources
low-pass filter
programs and data
inverse
29. 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.
IR
analog computers
number of values displayed per image side
high-pass filtering
30. Resolution is controlled by what?
Input devices
matrix size
CD or DVD
IRs
31. When subject contrast is high - the acquired data contrast will be ____.
read memory
parallel - serial
high
noise
32. What is a square series of boxes that gives form to the image?
bus speed
matrix
numerical values
window width
33. What is the name for a binary digit?
analog-to-digital converters
parallel - serial
smoothing
bit
34. Computer equipment is called what?
smaller
computers
bus speed
hardware
35. What is required for collection of input information?
detector
0 - 1
ROM
little
36. There is a ___ relationship between subject contrast and acquired data contrast.
electronic sources
DICOM standard
expansion or compression
direct
37. 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?
ROM
software
window width
bus
38. What was the earliest computer device called?
abacus
computers
raster scan pattern
1960s
39. When was ENIAC invented?
signal-to-noise ratio
bandwidth
Fourier Transformation
1945
40. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
noise
byte
hardware
41. What changes the pixel value by addition or subtraction and controls image density?
peripherals
write memory
window level
200 - 500-1000
42. What input device do radiographers use on a normal basis?
Input devices
scanning or array detection
increase
IRs
43. What are the two types of information computers use?
slow scanning
programs and data
direct
write memory
44. What is the frequency response of the incoming signal called?
contrast
computer - radiographer
bandwidth
numerical values
45. What determines resolution?
fine
analog-to-digital converters
bit
pixel size
46. What is critical to how fast the computer system can function?
IRs
bus speed
accentuates or suppresses
10 megabyte
47. What is the raw data to which a Fourier Transformation is applied to create the digital image?
software
frequency
edge enhancement filtering or sharpening
software
48. What permit input/output of information to or from the CPU?
detector
peripherals
1-2 lp/mm
software
49. 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?
band-pass filtering
bus
accentuates or suppresses
high
50. A high contrast image has a ___ frequency.
high
binary machine
1000+
write memory
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