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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. Which computers handle data composed of definite quantities of current?
digital computers
direct
filtering
RAM - ROM
2. What is the 'noisiest' component of a digital system?
smaller
TV camera
matrix size
matrix
3. The computer either ____ or ____ selected frequencies during the filtering process.
frequency
little
accentuates or suppresses
bus
4. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
signal-to-noise ratio
on
parallel - serial
gray scale bit depth
5. What is the 'heart' of every computer?
1000+
software
raster scan pattern
central processing unit
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
byte
DICOM standard
abacus
7. What is the measure of the differences between the data values referred to as?
high
write memory
inverse
contrast
8. The _____ the matrix size - the better the resolution.
signal-to-noise ratio
RAM
computer - radiographer
greater
9. What was the earliest computer device called?
memory
central processing unit
abacus
transverse - sagittal - and coronal
10. What is a square series of boxes that gives form to the image?
array processors
mathematical theory - solid-state electronics - and microchip technology
10 megabyte
matrix
11. Binary systems operate with a ___-symbol language.
two
peripherals
gray scale bit depth
inverse
12. What are devices that process information?
pixel size
digital computers
software
computers
13. What does a 0 in binary code stand for?
greater
frequency - contrast - and noise
off
peripherals
14. What type of memory storage devices are required for large amounts of data?
raster scan pattern
memory
CD or DVD
CPU - Bus
15. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
analog computers
bit
monitors and printers
16. What is high-pass filtering also called?
1970s-1990s
edge enhancement filtering or sharpening
bandwidth
pixel
17. What is the name of the 'modern electronic computer'?
1000+
ENIAC
IR
computer - radiographer
18. Changes in window width are sometimes called gray scale ____ or ____.
200 - 500-1000
shades of gray
array detection
expansion or compression
19. The number of shades of gray is determined by what?
gray scale bit depth
central processing unit
fine
RAM - ROM
20. What is an individual matrix box or picture element?
central processing unit
1960s
pixel
raster scan pattern
21. Digital detectors are capable of producing ______ shades of gray.
1000+
parallel - serial
bus speed
digital computers
22. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1945
low
voxel
1-2 lp/mm
23. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
decrease
bit
Input devices
low-pass filter
24. The human visual range is ___ or fewer shades of gray.
numerical values
32
frequency - contrast - and noise
direct
25. In what time period did mathematical theory and solid-state electronics come out?
numerical value
Fourier Transformation
data
1940s
26. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
data
central processing unit
analog-to-digital converters
27. Computers operate from ____ ____ language.
smaller
window width
number of values displayed per image side
binary machine
28. 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?
digital computers
IR
monitors and printers
bus
29. What 3 things were required prior to digital computer applications in medical imaging?
mathematical theory - solid-state electronics - and microchip technology
IRs
inversely
2^x
30. What is an image that has been converted into numerical values for transmission or processing?
decrease
peripherals
RAM - ROM
digital image
31. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
abacus
high
numerical value
fine
32. 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
0 - 1
analog computers
peripherals
33. What is an image that has been converted into numerical values for transmission or processing?
decreased
digital image
bus
filtering
34. Window width and contrast have an ____ relationship.
expansion or compression
software
decreased
inverse
35. What 3 things were required prior to digital computer applications in medical imaging?
mathematical theory - solid-state electronics - and microchip technology
numerical value
off
bus
36. In what time period did microchip technology come out?
1960s
electronic sources
central processing unit
bandwidth
37. If the window level increases - density will _____.
increase
RAM - ROM
digital computers
health level 7
38. 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.
edge enhancement filtering or sharpening
decrease
window
bus speed
39. A high contrast image has a ___ frequency.
window
signal-to-noise ratio
high
32
40. What is the 'heart' of every computer?
central processing unit
large amount
mathematical theory - solid-state electronics - and microchip technology
two
41. What changes the pixel value by multiplication or division and controls image contrast?
software
little
window width
central processing unit
42. When detectors acquire their information through ____ they are receiving all the info at once.
pixel
10 megabyte
peripherals
array detection
43. What are the two most common output devices?
on
monitors and printers
slow scanning
programs and data
44. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
little
hardware
large amount
array detection
45. What does a 1 in binary code stand for?
window width
on
frequency
scanning
46. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
1945
voltage
Fourier Transformation
47. A __ _____ disk will store over 10000000 bytes of information.
mathematical theory - solid-state electronics - and microchip technology
programs and data
reduces
10 megabyte
48. What directs information to and from various parts of the computer?
central processing unit
parallel - serial
peripherals
frequency - contrast - and noise
49. What is the name for a binary digit?
bit
low-pass filter
computers
off
50. A low contrast image has a ___ frequency.
bit
shades of gray
200 - 500-1000
low