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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 does a 0 in binary code stand for?
Input devices
decrease
off
magnetic tape
2. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
bus speed
Input devices
accentuates or suppresses
CT and MRI
3. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
direct
slow scanning
Input devices
numerical values
4. 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?
32
peripherals
computer - radiographer
DICOM standard
5. Who or What is responsible for density changes on a digital image? On a manual image
pixel
computer - radiographer
edge enhancement filtering or sharpening
RAM
6. Computer memory is often rated in terms of total ____ memory.
byte
magnetic tape
CD or DVD
progressive scanning
7. What type of scanning increases resolution slightly by scanning all 525 lines in order?
increase
digital image
progressive scanning
inverse
8. What is the primary limitation with the resolution on digital images?
pixel
raster scan pattern
computers
filtering
9. Resolution is controlled by what?
accentuates or suppresses
matrix size
noise
1960s
10. A larger matrix provides ____ pixels.
detector
decreased
smaller
fine
11. What is required for collection of input information?
1-2 lp/mm
detector
matrix
little
12. Which memory can only be extracted without alteration; cannot change?
DICOM standard
read memory
bus
window
13. Computer programs are called what?
ROM
direct
computer - radiographer
software
14. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
magnetic tape
numerical value
ENIAC
15. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
byte
1-2 lp/mm
digital image
16. What is required for collection of input information?
bus
window
computers
detector
17. Who or What is responsible for density changes on a digital image? On a manual image
CPU - Bus
matrix size
computer - radiographer
analog-to-digital converters
18. 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.
1970s-1990s
slow scanning
1000+
high-pass filtering
19. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
programs and data
contrast
array processors
IRs
20. The ____ is the heart of the computer while the ___ is the vessels.
direct
scanning or array detection
byte
CPU - Bus
21. Increased noise = _____ image contrast.
decreased
contrast
inversely
0 - 1
22. What is the 'noisiest' component of a digital system?
32
TV camera
abacus
contrast
23. Digital detectors are capable of producing ______ shades of gray.
1945
1000+
computer - radiographer
IR
24. What are devices that process information?
byte
0 - 1
digital computers
computers
25. Computer equipment is called what?
bus
hardware
shades of gray
binary machine
26. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
expansion or compression
fine
byte
27. Each pixel is capable of representing a wide range of what?
shades of gray
bus
1940s
byte
28. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
contrast
two
shades of gray
29. Window width and contrast have an ____ relationship.
software
1000+
pixel size
inverse
30. When detectors acquire their information by ____ they are receiving info from a specific area.
write memory
scanning
digital computers
bus speed
31. What are the 3 classifications of digitized image filters?
IRs
low-pass - band-pass - and high-pass
noise
bus
32. Binary systems operate with a ___-symbol language.
high-pass filtering
high
two
TV camera
33. Window width and contrast have an ____ relationship.
array processors
RAM - ROM
inverse
contrast
34. When detectors acquire their information by ____ they are receiving info from a specific area.
high-pass filtering
high-pass filtering
scanning
voltage
35. What is the name for a binary digit?
voltage
scanning or array detection
reduces
bit
36. 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?
numerical value
DICOM standard
high
bus
37. What are the two most common output devices?
TV camera
software
monitors and printers
CT and MRI
38. What input device do radiographers use on a normal basis?
analog computers
0 - 1
inversely
IRs
39. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
high-pass filtering
smoothing
window
pixel size
40. 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?
transverse - sagittal - and coronal
array processors
detector
detector
41. What is the name for an 8-bit word?
expansion or compression
byte
abacus
write memory
42. Which memory replaces new information with the old; can change?
high
write memory
electronic sources
voltage
43. What can memory be transferred as?
digital computers
10 megabyte
parallel - serial
voltage
44. What type of scanning increases resolution but can't be used in real-time dynamic studies?
increase
slow scanning
digital imaging and communication in medicine
write memory
45. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
hardware
Fourier Transformation
1970s-1990s
fine
46. What can memory be transferred as?
binary machine
data
voltage
little
47. What permit input/output of information to or from the CPU?
high
peripherals
digital image
analog-to-digital converters
48. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
frequency - contrast - and noise
accentuates or suppresses
electronic sources
voxel
49. What input device do radiographers use on a normal basis?
low-pass - band-pass - and high-pass
memory
software
IRs
50. When detectors acquire their information through ____ they are receiving all the info at once.
reduces
array detection
memory
read memory