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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 type of memory storage devices are required for large amounts of data?
pixel
CD or DVD
program
high
2. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
numerical value
parallel - serial
raster scan pattern
computers
3. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
scanning
10 megabyte
array processors
4. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
slow scanning
program
scanning
5. What is an image that has been converted into numerical values for transmission or processing?
1970s-1990s
digital image
little
TV camera
6. Digitalization of analog information (increases / reduces) the quality and quantity of information?
pixel
reduces
digital imaging and communication in medicine
decrease
7. What permit input/output of information to or from the CPU?
noise
peripherals
programs and data
analog-to-digital converters
8. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
program
IR
software
9. Which memory can only be extracted without alteration; cannot change?
read memory
high
ROM
Input devices
10. What was the earliest computer device called?
abacus
slow scanning
voxel
frequency - contrast - and noise
11. Fluoroscopic noise mostly comes from what?
digital computers
smaller
electronic sources
frequency
12. What are the two most common output devices?
1940s
byte
monitors and printers
progressive scanning
13. What is the name for an 8-bit word?
inversely
byte
health level 7
frequency - contrast - and noise
14. 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?
low-pass - band-pass - and high-pass
bus
ROM
scanning or array detection
15. Computerized digital images are described in terms of what
bandwidth
ENIAC
number of values displayed per image side
0 - 1
16. What is the primary limitation with the resolution on digital images?
matrix size
raster scan pattern
central processing unit
edge enhancement filtering or sharpening
17. What is high-pass filtering also called?
digital computers
high-pass filtering
200 - 500-1000
edge enhancement filtering or sharpening
18. Medical imaging is often achieved from information that has been processed by what?
gray scale bit depth
program
analog-to-digital converters
health level 7
19. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
matrix
frequency - contrast - and noise
CD or DVD
filtering
20. What determines resolution?
reduces
pixel size
slow scanning
scanning
21. Noise is measured as what?
high-pass filtering
voxel
signal-to-noise ratio
frequency - contrast - and noise
22. Which computers handle data composed of definite quantities of current?
10 megabyte
digital computers
programs and data
increase
23. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
greater
fine
bandwidth
smaller
24. What is required for collection of input information?
1940s
fine
detector
raster scan pattern
25. 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.
progressive scanning
32
high-pass filtering
off
26. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
2^x
magnetic tape
bus speed
27. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
low-pass filter
read memory
electronic sources
DICOM standard
28. In what time period did mathematical theory and solid-state electronics come out?
1940s
expansion or compression
CPU - Bus
expansion or compression
29. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
1970s-1990s
progressive scanning
large amount
analog computers
30. A low contrast image has a ___ frequency.
software
bus
digital computers
low
31. Noise is ____ related to contrast.
transverse - sagittal - and coronal
0 - 1
inversely
bit
32. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
expansion or compression
32
bandwidth
numerical values
33. All medical imaging is achieved with which type of computers?
analog computers
IR
gray scale bit depth
digital computers
34. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
peripherals
byte
computer - radiographer
35. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
Fourier Transformation
numerical values
detector
10 megabyte
36. When subject contrast is high - the acquired data contrast will be ____.
digital computers
ENIAC
fine
high
37. What changes the pixel value by addition or subtraction and controls image density?
window level
computer - radiographer
numerical value
byte
38. What modalities are array processors useful for?
matrix size
shades of gray
DICOM standard
CT and MRI
39. In what time period did mathematical theory and solid-state electronics come out?
numerical value
byte
two
1940s
40. What can memory be transferred as?
data
1970s-1990s
direct
voltage
41. When detectors acquire their information by ____ they are receiving info from a specific area.
peripherals
fine
health level 7
scanning
42. Each pixel is capable of representing a wide range of what?
shades of gray
peripherals
digital computers
CPU - Bus
43. What are the two ways detectors acquire information?
scanning or array detection
peripherals
smaller
binary machine
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?
transverse - sagittal - and coronal
health level 7
large amount
byte
45. Computer memory is often rated in terms of total ____ memory.
32
frequency
window width
byte
46. Binary systems operate with a ___-symbol language.
bus speed
two
smaller
electronic sources
47. What is the mathematical algorithm used to create all medical images?
central processing unit
numerical value
1000+
Fourier Transformation
48. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
decreased
ROM
detector
2^x
49. What is an image that has been converted into numerical values for transmission or processing?
data
digital image
analog-to-digital converters
high
50. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
number of values displayed per image side
low-pass - band-pass - and high-pass
digital computers