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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. There is a ___ relationship between subject contrast and acquired data contrast.
band-pass filtering
1960s
direct
window level
2. What is the frequency response of the incoming signal called?
bandwidth
digital image
decreased
RAM
3. In what time period did microchip technology come out?
frequency
abacus
fine
1960s
4. What determines resolution?
health level 7
inverse
CD or DVD
pixel size
5. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
binary machine
ROM
bus
6. Window width and contrast have an ____ relationship.
read memory
inverse
reduces
matrix
7. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
smaller
array processors
slow scanning
8. Digital detectors are capable of producing ______ shades of gray.
1000+
pixel size
programs and data
parallel - serial
9. What is high-pass filtering also called?
edge enhancement filtering or sharpening
1970s-1990s
matrix size
scanning or array detection
10. What modalities are array processors useful for?
peripherals
1945
magnetic tape
CT and MRI
11. What is the measure of the differences between the data values referred to as?
signal-to-noise ratio
contrast
magnetic tape
10 megabyte
12. The quality of the data acquired from the IR is measured by what three data characteristics?
CPU - Bus
computer - radiographer
frequency - contrast - and noise
digital imaging and communication in medicine
13. A larger matrix provides ____ pixels.
read memory
smaller
low
parallel - serial
14. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
shades of gray
array processors
RAM - ROM
CPU - Bus
15. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
200 - 500-1000
pixel size
scanning or array detection
16. The _____ the matrix size - the better the resolution.
shades of gray
greater
pixel
CD or DVD
17. What permit input/output of information to or from the CPU?
CT and MRI
peripherals
DICOM standard
matrix size
18. A low contrast image has a ___ frequency.
CD or DVD
write memory
digital computers
low
19. What was the earliest computer device called?
2^x
abacus
write memory
matrix
20. What does a 0 in binary code stand for?
200 - 500-1000
off
voltage
10 megabyte
21. Noise is ____ related to contrast.
health level 7
slow scanning
inversely
low-pass - band-pass - and high-pass
22. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
array processors
pixel size
numerical value
off
23. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
greater
200 - 500-1000
pixel
peripherals
24. What is the information stored as magnetic variations referred to as?
memory
voxel
edge enhancement filtering or sharpening
matrix
25. There is a ___ relationship between subject contrast and acquired data contrast.
matrix
direct
CT and MRI
1000+
26. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
number of values displayed per image side
parallel - serial
smoothing
edge enhancement filtering or sharpening
27. Changes in window width are sometimes called gray scale ____ or ____.
expansion or compression
accentuates or suppresses
frequency - contrast - and noise
32
28. What type of memory storage devices are required for large amounts of data?
CD or DVD
200 - 500-1000
accentuates or suppresses
memory
29. 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.
little
window
ROM
32
30. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
number of values displayed per image side
filtering
RAM - ROM
RAM
31. When was ENIAC invented?
off
central processing unit
1960s
1945
32. What determines resolution?
decreased
magnetic tape
scanning or array detection
pixel size
33. In what time period did mathematical theory and solid-state electronics come out?
off
1940s
window
RAM
34. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
high-pass filtering
smoothing
fine
ENIAC
35. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
Input devices
RAM
0 - 1
decreased
36. Computers operate from ____ ____ language.
binary machine
software
band-pass filtering
voltage
37. A low contrast image has a ___ frequency.
low
pixel size
RAM - ROM
numerical value
38. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
direct
voxel
peripherals
bus speed
39. 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.
hardware
high-pass filtering
mathematical theory - solid-state electronics - and microchip technology
mathematical theory - solid-state electronics - and microchip technology
40. Which computers handle data composed of definite quantities of current?
digital computers
pixel size
RAM - ROM
low-pass filter
41. Which type of filter amplifies or deletes all but a selected range or band of frequencies and is useful in the elimination of characteristic emission peaks?
large amount
digital computers
matrix size
band-pass filtering
42. When detectors acquire their information through ____ they are receiving all the info at once.
high
computers
0 - 1
array detection
43. What is the name for a binary digit?
peripherals
window
health level 7
bit
44. What can memory be transferred as?
voltage
write memory
RAM
ROM
45. What does a 1 in binary code stand for?
little
on
low
voxel
46. What does DICOM stand for?
frequency - contrast - and noise
digital imaging and communication in medicine
byte
signal-to-noise ratio
47. 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
number of values displayed per image side
IR
48. What is the raw data to which a Fourier Transformation is applied to create the digital image?
parallel - serial
slow scanning
frequency
low-pass - band-pass - and high-pass
49. The quality of the data acquired from the IR is measured by what three data characteristics?
data
bandwidth
frequency - contrast - and noise
10 megabyte
50. What is an image that has been converted into numerical values for transmission or processing?
digital image
gray scale bit depth
bus
IR