SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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 'heart' of every computer?
expansion or compression
mathematical theory - solid-state electronics - and microchip technology
1960s
central processing unit
2. Window width and contrast have an ____ relationship.
digital computers
array processors
voxel
inverse
3. What is the random background information that does not contribute to the image quality?
noise
electronic sources
greater
byte
4. What is the equation for determining gray scale bit depth?
number of values displayed per image side
RAM
2^x
central processing unit
5. A __ _____ disk will store over 10000000 bytes of information.
Fourier Transformation
analog-to-digital converters
RAM
10 megabyte
6. What is the measure of the differences between the data values referred to as?
digital computers
smoothing
voltage
contrast
7. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
1945
accentuates or suppresses
pixel
8. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
binary machine
scanning or array detection
1970s-1990s
array processors
9. The ____ is the heart of the computer while the ___ is the vessels.
32
accentuates or suppresses
CPU - Bus
on
10. The _____ the matrix size - the better the resolution.
memory
RAM - ROM
greater
binary machine
11. Computer memory is often rated in terms of total ____ memory.
byte
smoothing
window level
Input devices
12. What is high-pass filtering also called?
RAM - ROM
edge enhancement filtering or sharpening
DICOM standard
1970s-1990s
13. 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.
high-pass filtering
byte
frequency
smaller
14. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
peripherals
fine
numerical values
RAM
15. What does a 1 in binary code stand for?
on
0 - 1
CD or DVD
mathematical theory - solid-state electronics - and microchip technology
16. Increased noise = _____ image contrast.
decreased
matrix
inversely
ROM
17. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
window width
array processors
analog-to-digital converters
filtering
18. 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
1945
computers
two
19. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
digital image
contrast
scanning
20. If the window level increases - density will _____.
voltage
increase
inversely
noise
21. Which type of information consists of collected facts?
CPU - Bus
data
peripherals
1000+
22. What is an image that has been converted into numerical values for transmission or processing?
shades of gray
data
10 megabyte
digital image
23. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
bit
central processing unit
programs and data
24. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
health level 7
numerical value
transverse - sagittal - and coronal
25. The ____ is the heart of the computer while the ___ is the vessels.
band-pass filtering
pixel size
CPU - Bus
high-pass filtering
26. What provides specific instructions for calculations and sequential steps to be followed?
computers
inversely
software
digital computers
27. What changes the pixel value by multiplication or division and controls image contrast?
ENIAC
window width
parallel - serial
pixel
28. What is the name for an 8-bit word?
computers
parallel - serial
byte
smaller
29. What is required for collection of input information?
DICOM standard
detector
central processing unit
off
30. What are the two types of information computers use?
scanning or array detection
programs and data
byte
1000+
31. Noise is ____ related to contrast.
ENIAC
DICOM standard
filtering
inversely
32. What does a 0 in binary code stand for?
fine
off
on
fine
33. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
low-pass - band-pass - and high-pass
RAM
hardware
34. What is critical to how fast the computer system can function?
matrix size
bus speed
inversely
pixel size
35. What is the measure of the differences between the data values referred to as?
detector
Fourier Transformation
transverse - sagittal - and coronal
contrast
36. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
software
expansion or compression
peripherals
bandwidth
37. In what time period did microchip technology come out?
slow scanning
inverse
1970s-1990s
1960s
38. If window width increases - image contrast will ____.
decrease
signal-to-noise ratio
frequency
contrast
39. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
scanning or array detection
health level 7
200 - 500-1000
40. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
low-pass - band-pass - and high-pass
detector
1000+
numerical values
41. Which computers handle data composed of continuously varying electrical currents?
shades of gray
edge enhancement filtering or sharpening
low-pass - band-pass - and high-pass
analog computers
42. What is the 'noisiest' component of a digital system?
TV camera
inverse
mathematical theory - solid-state electronics - and microchip technology
CD or DVD
43. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
bus speed
RAM - ROM
window width
DICOM standard
44. What determines resolution?
frequency
fine
memory
pixel size
45. Who or What is responsible for density changes on a digital image? On a manual image
noise
computer - radiographer
matrix size
RAM
46. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
CPU - Bus
progressive scanning
filtering
central processing unit
47. Who or What is responsible for density changes on a digital image? On a manual image
TV camera
computer - radiographer
filtering
Fourier Transformation
48. What does DICOM stand for?
digital imaging and communication in medicine
reduces
window width
scanning or array detection
49. Resolution is controlled by what?
direct
mathematical theory - solid-state electronics - and microchip technology
increase
matrix size
50. 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.
binary machine
software
software
window