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Test your basic knowledge |
Digital Image Processing
Start Test
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 are the two types of information computers use?
contrast
off
high-pass filtering
programs and data
2. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
high-pass filtering
transverse - sagittal - and coronal
frequency - contrast - and noise
3. What is the frequency response of the incoming signal called?
off
parallel - serial
signal-to-noise ratio
bandwidth
4. What changes the pixel value by addition or subtraction and controls image density?
reduces
electronic sources
window level
central processing unit
5. What is the information stored as magnetic variations referred to as?
hardware
memory
signal-to-noise ratio
program
6. Noise is measured as what?
signal-to-noise ratio
RAM
reduces
smaller
7. 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.
10 megabyte
window
0 - 1
write memory
8. In what time period did microchip technology come out?
numerical value
abacus
binary machine
1960s
9. What directs information to and from various parts of the computer?
abacus
detector
central processing unit
off
10. What is a square series of boxes that gives form to the image?
hardware
digital computers
memory
matrix
11. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
bus
electronic sources
numerical value
matrix size
12. Resolution is controlled by what?
frequency
inverse
matrix size
IRs
13. The computer either ____ or ____ selected frequencies during the filtering process.
raster scan pattern
accentuates or suppresses
analog-to-digital converters
software
14. In what time period did mathematical theory and solid-state electronics come out?
2^x
1940s
read memory
read memory
15. What are the two ways detectors acquire information?
scanning or array detection
accentuates or suppresses
low-pass filter
band-pass filtering
16. What can memory be transferred as?
1970s-1990s
analog-to-digital converters
voltage
reduces
17. What is the name for an 8-bit word?
mathematical theory - solid-state electronics - and microchip technology
CD or DVD
1940s
byte
18. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
bus speed
detector
large amount
raster scan pattern
19. What type of scanning increases resolution slightly by scanning all 525 lines in order?
reduces
CD or DVD
progressive scanning
window
20. What provides specific instructions for calculations and sequential steps to be followed?
window width
bandwidth
software
computer - radiographer
21. What changes the pixel value by multiplication or division and controls image contrast?
window width
CT and MRI
slow scanning
computer - radiographer
22. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
programs and data
scanning or array detection
numerical values
RAM - ROM
23. There is a ___ relationship between subject contrast and acquired data contrast.
direct
signal-to-noise ratio
numerical values
off
24. Computer programs are called what?
software
high-pass filtering
raster scan pattern
voxel
25. What type of memory storage devices are required for large amounts of data?
smaller
CD or DVD
computer - radiographer
TV camera
26. The quality of the data acquired from the IR is measured by what three data characteristics?
expansion or compression
frequency - contrast - and noise
hardware
Input devices
27. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
2^x
array detection
bandwidth
numerical values
28. Which computers handle data composed of continuously varying electrical currents?
band-pass filtering
electronic sources
health level 7
analog computers
29. Medical imaging is often achieved from information that has been processed by what?
on
analog-to-digital converters
voltage
bus speed
30. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
window width
off
magnetic tape
1940s
31. Computerized digital images are described in terms of what
bus speed
raster scan pattern
on
number of values displayed per image side
32. What are devices that process information?
binary machine
CPU - Bus
computers
smaller
33. Computer memory is often rated in terms of total ____ memory.
filtering
byte
two
voltage
34. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
filtering
matrix size
RAM - ROM
pixel size
35. What is the equation for determining gray scale bit depth?
low
digital imaging and communication in medicine
pixel
2^x
36. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
1000+
magnetic tape
signal-to-noise ratio
37. Computerized digital images are described in terms of what
decrease
computers
computer - radiographer
number of values displayed per image side
38. What is the mathematical algorithm used to create all medical images?
scanning or array detection
program
digital computers
Fourier Transformation
39. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.
IR
0 - 1
window
byte
40. What is an image that has been converted into numerical values for transmission or processing?
matrix
inversely
2^x
digital image
41. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
bit
accentuates or suppresses
software
42. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
parallel - serial
CPU - Bus
digital computers
43. What is the primary limitation with the resolution on digital images?
bandwidth
Fourier Transformation
array detection
raster scan pattern
44. DICOM imaging now includes compatibility via a database system that includes linage of the patient images with the patient's EMR. This database system is called what?
hardware
mathematical theory - solid-state electronics - and microchip technology
health level 7
noise
45. What was the earliest computer device called?
numerical value
abacus
matrix
noise
46. Modalities differ in bit depth that is available depending on the capabilities of what?
IR
byte
peripherals
transverse - sagittal - and coronal
47. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
off
analog computers
raster scan pattern
48. What does a 1 in binary code stand for?
on
RAM
transverse - sagittal - and coronal
inverse
49. Noise is ____ related to contrast.
inversely
direct
edge enhancement filtering or sharpening
peripherals
50. Window width and contrast have an ____ relationship.
voltage
mathematical theory - solid-state electronics - and microchip technology
inverse
1000+
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