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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 required for collection of input information?
Fourier Transformation
byte
computers
detector
2. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
band-pass filtering
software
health level 7
3. All medical imaging is achieved with which type of computers?
digital computers
bus
digital imaging and communication in medicine
parallel - serial
4. Computer memory is often rated in terms of total ____ memory.
smoothing
filtering
byte
expansion or compression
5. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
CT and MRI
fine
array detection
filtering
6. The computer either ____ or ____ selected frequencies during the filtering process.
shades of gray
digital imaging and communication in medicine
bus
accentuates or suppresses
7. If window width increases - image contrast will ____.
numerical values
decrease
IRs
smoothing
8. Computers operate from ____ ____ language.
software
binary machine
ROM
voxel
9. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
on
smoothing
central processing unit
accentuates or suppresses
10. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
digital image
voxel
parallel - serial
1945
11. What is high-pass filtering also called?
edge enhancement filtering or sharpening
band-pass filtering
abacus
data
12. If window width increases - image contrast will ____.
decrease
bus
Input devices
memory
13. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
digital computers
shades of gray
peripherals
programs and data
14. Which computers handle data composed of continuously varying electrical currents?
computers
analog computers
signal-to-noise ratio
fine
15. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
200 - 500-1000
scanning
bus
1-2 lp/mm
16. What is the name for an 8-bit word?
byte
noise
increase
low-pass filter
17. 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.
window
frequency - contrast - and noise
little
fine
18. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
ENIAC
array processors
digital computers
increase
19. What is the name for a binary digit?
number of values displayed per image side
bit
1945
reduces
20. What does a 1 in binary code stand for?
byte
on
reduces
inverse
21. A high contrast image has a ___ frequency.
10 megabyte
high
digital imaging and communication in medicine
byte
22. A high contrast image has a ___ frequency.
high
analog-to-digital converters
matrix size
smaller
23. What is an image that has been converted into numerical values for transmission or processing?
low-pass filter
contrast
digital image
number of values displayed per image side
24. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
bit
parallel - serial
RAM - ROM
RAM
25. Fluoroscopic noise mostly comes from what?
data
IR
bandwidth
electronic sources
26. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
analog computers
bus
parallel - serial
central processing unit
27. What is the equation for determining gray scale bit depth?
health level 7
analog-to-digital converters
low-pass filter
2^x
28. What is an image that has been converted into numerical values for transmission or processing?
low
accentuates or suppresses
digital image
numerical values
29. What is the measure of the differences between the data values referred to as?
contrast
monitors and printers
detector
high
30. What is the primary limitation with the resolution on digital images?
raster scan pattern
digital computers
byte
frequency - contrast - and noise
31. Digital detectors are capable of producing ______ shades of gray.
large amount
1000+
RAM - ROM
data
32. What directs information to and from various parts of the computer?
decrease
inverse
central processing unit
1940s
33. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
software
direct
digital computers
34. 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
numerical value
little
parallel - serial
35. Which memory replaces new information with the old; can change?
write memory
edge enhancement filtering or sharpening
bus
RAM - ROM
36. What type of memory storage devices are required for large amounts of data?
10 megabyte
memory
CD or DVD
RAM
37. In what time period did microchip technology come out?
filtering
window width
1960s
off
38. What does DICOM stand for?
electronic sources
1960s
digital imaging and communication in medicine
expansion or compression
39. Which computers handle data composed of definite quantities of current?
decreased
RAM
window level
digital computers
40. Which memory can only be extracted without alteration; cannot change?
read memory
1970s-1990s
1940s
window
41. Digital detectors are capable of producing ______ shades of gray.
byte
1000+
numerical values
electronic sources
42. 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?
binary machine
health level 7
smoothing
byte
43. 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.
fine
CD or DVD
high-pass filtering
two
44. Resolution is controlled by what?
matrix size
on
low
gray scale bit depth
45. What can memory be transferred as?
expansion or compression
central processing unit
voltage
digital image
46. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
memory
digital image
shades of gray
low-pass filter
47. Medical imaging is often achieved from information that has been processed by what?
signal-to-noise ratio
1945
inverse
analog-to-digital converters
48. What is the digital standard for imaging that is designed to ensure that all equipment fro all manufacturers who choose to adhere to the standard are speaking the same computer language?
window width
increase
DICOM standard
fine
49. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
TV camera
RAM - ROM
DICOM standard
low-pass filter
50. If the window level increases - density will _____.
high
monitors and printers
TV camera
increase
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