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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 the information stored as magnetic variations referred to as?
scanning or array detection
digital computers
programs and data
memory
2. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
edge enhancement filtering or sharpening
DICOM standard
voxel
high
3. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
bit
hardware
Input devices
4. What is the random background information that does not contribute to the image quality?
gray scale bit depth
write memory
noise
digital computers
5. In what time period did microchip technology come out?
1960s
raster scan pattern
on
voltage
6. What is the mathematical algorithm used to create all medical images?
1-2 lp/mm
little
little
Fourier Transformation
7. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
RAM - ROM
gray scale bit depth
Fourier Transformation
8. Noise is measured as what?
signal-to-noise ratio
Fourier Transformation
IR
1945
9. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
0 - 1
IRs
bus
digital computers
10. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
2^x
low-pass - band-pass - and high-pass
off
11. Modalities differ in bit depth that is available depending on the capabilities of what?
data
accentuates or suppresses
IR
peripherals
12. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
on
Fourier Transformation
fine
scanning or array detection
13. A __ _____ disk will store over 10000000 bytes of information.
frequency
TV camera
10 megabyte
analog-to-digital converters
14. A high contrast image has a ___ frequency.
bus
filtering
high
raster scan pattern
15. What is the name for a binary digit?
contrast
reduces
bit
gray scale bit depth
16. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
shades of gray
smoothing
IRs
reduces
17. What directs information to and from various parts of the computer?
2^x
window level
programs and data
central processing unit
18. What does a 0 in binary code stand for?
on
off
low-pass filter
magnetic tape
19. When was ENIAC invented?
1945
200 - 500-1000
bus
scanning or array detection
20. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
matrix size
on
decrease
21. Computer memory is often rated in terms of total ____ memory.
detector
byte
numerical values
high
22. Around what time did digital computerization come out for CT and US?
program
1970s-1990s
scanning or array detection
TV camera
23. What was the earliest computer device called?
bus
abacus
RAM
read memory
24. What was the earliest computer device called?
bit
window width
abacus
magnetic tape
25. A high S/N indicates ___ noise in the image.
little
detector
pixel size
bus speed
26. What is the frequency response of the incoming signal called?
200 - 500-1000
byte
magnetic tape
bandwidth
27. A larger matrix provides ____ pixels.
direct
CPU - Bus
CT and MRI
smaller
28. What are the two ways detectors acquire information?
bus
scanning or array detection
window width
ROM
29. What changes the pixel value by multiplication or division and controls image contrast?
window width
window level
32
CPU - Bus
30. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
central processing unit
Input devices
fine
number of values displayed per image side
31. The number of shades of gray is determined by what?
gray scale bit depth
1000+
write memory
array detection
32. The number of shades of gray is determined by what?
gray scale bit depth
32
increase
band-pass filtering
33. Which memory can only be extracted without alteration; cannot change?
read memory
bit
0 - 1
computer - radiographer
34. 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.
voxel
magnetic tape
decreased
window
35. A low contrast image has a ___ frequency.
low
direct
digital computers
analog-to-digital converters
36. All medical imaging is achieved with which type of computers?
digital computers
bus speed
1945
frequency - contrast - and noise
37. Increased noise = _____ image contrast.
parallel - serial
decreased
decrease
bus
38. What are the two ways detectors acquire information?
accentuates or suppresses
data
TV camera
scanning or array detection
39. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
direct
low-pass - band-pass - and high-pass
inverse
magnetic tape
40. Which type of information consists of collected facts?
window level
bit
byte
data
41. When detectors acquire their information by ____ they are receiving info from a specific area.
TV camera
memory
scanning
reduces
42. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
inversely
bandwidth
fine
RAM
43. In what time period did mathematical theory and solid-state electronics come out?
1940s
fine
band-pass filtering
abacus
44. The _____ the matrix size - the better the resolution.
greater
bus speed
bus
number of values displayed per image side
45. What is the 'heart' of every computer?
central processing unit
1-2 lp/mm
digital computers
digital imaging and communication in medicine
46. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
peripherals
1-2 lp/mm
parallel - serial
TV camera
47. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
DICOM standard
two
two
voxel
48. The computer either ____ or ____ selected frequencies during the filtering process.
digital imaging and communication in medicine
decreased
accentuates or suppresses
software
49. What is required for collection of input information?
electronic sources
bit
off
detector
50. What permit input/output of information to or from the CPU?
CPU - Bus
1970s-1990s
peripherals
RAM - ROM