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 are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
analog-to-digital converters
200 - 500-1000
analog-to-digital converters
Input devices
2. Noise is measured as what?
DICOM standard
analog-to-digital converters
pixel
signal-to-noise ratio
3. What are devices that process information?
computers
reduces
health level 7
decreased
4. Which type of information consists of collected facts?
fine
bus
TV camera
data
5. What determines resolution?
bus
smaller
pixel size
low-pass filter
6. Each pixel is capable of representing a wide range of what?
shades of gray
ENIAC
inverse
analog computers
7. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
transverse - sagittal - and coronal
write memory
ENIAC
inversely
8. What is an image that has been converted into numerical values for transmission or processing?
central processing unit
Input devices
digital image
on
9. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
transverse - sagittal - and coronal
scanning or array detection
peripherals
accentuates or suppresses
10. When was ENIAC invented?
1945
1000+
greater
hardware
11. What are devices that process information?
1-2 lp/mm
computers
computer - radiographer
smaller
12. The _____ the matrix size - the better the resolution.
voltage
low-pass filter
array detection
greater
13. Fluoroscopic noise mostly comes from what?
electronic sources
central processing unit
inversely
increase
14. 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.
0 - 1
hardware
detector
high-pass filtering
15. What provides specific instructions for calculations and sequential steps to be followed?
software
1-2 lp/mm
health level 7
array processors
16. What type of scanning increases resolution but can't be used in real-time dynamic studies?
transverse - sagittal - and coronal
abacus
slow scanning
fine
17. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
bus speed
smoothing
electronic sources
parallel - serial
18. Medical imaging is often achieved from information that has been processed by what?
raster scan pattern
voxel
analog-to-digital converters
slow scanning
19. When detectors acquire their information through ____ they are receiving all the info at once.
analog computers
computers
array detection
little
20. If window width increases - image contrast will ____.
fine
1940s
electronic sources
decrease
21. What is the 'noisiest' component of a digital system?
TV camera
bus speed
increase
inverse
22. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
1940s
central processing unit
number of values displayed per image side
peripherals
23. What permit input/output of information to or from the CPU?
peripherals
RAM
Input devices
smaller
24. A low contrast image has a ___ frequency.
array detection
low
number of values displayed per image side
scanning or array detection
25. Resolution is controlled by what?
signal-to-noise ratio
matrix size
digital computers
low
26. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
peripherals
analog-to-digital converters
1940s
fine
27. 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?
inverse
edge enhancement filtering or sharpening
1-2 lp/mm
health level 7
28. What are the two most common output devices?
monitors and printers
pixel size
software
noise
29. 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?
band-pass filtering
noise
inversely
smaller
30. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
Fourier Transformation
1960s
analog computers
peripherals
31. What is critical to how fast the computer system can function?
gray scale bit depth
read memory
bus speed
bandwidth
32. Noise is ____ related to contrast.
expansion or compression
digital computers
inversely
hardware
33. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
voxel
RAM - ROM
analog-to-digital converters
IRs
34. Increased noise = _____ image contrast.
decreased
filtering
binary machine
byte
35. What was the earliest computer device called?
abacus
inverse
TV camera
detector
36. What is high-pass filtering also called?
accentuates or suppresses
peripherals
edge enhancement filtering or sharpening
10 megabyte
37. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
expansion or compression
contrast
smoothing
38. The number of shades of gray is determined by what?
gray scale bit depth
high
hardware
analog computers
39. What determines resolution?
pixel size
programs and data
on
computers
40. What type of memory storage devices are required for large amounts of data?
high-pass filtering
CD or DVD
byte
0 - 1
41. In what time period did microchip technology come out?
2^x
raster scan pattern
byte
1960s
42. Computer memory is often rated in terms of total ____ memory.
CD or DVD
smaller
digital imaging and communication in medicine
byte
43. What provides specific instructions for calculations and sequential steps to be followed?
software
window
read memory
0 - 1
44. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
noise
parallel - serial
low-pass filter
1-2 lp/mm
45. Who or What is responsible for density changes on a digital image? On a manual image
pixel size
voltage
computer - radiographer
analog-to-digital converters
46. Noise is ____ related to contrast.
health level 7
CT and MRI
inversely
low-pass - band-pass - and high-pass
47. 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?
bit
frequency
bus
byte
48. What does a 1 in binary code stand for?
on
RAM - ROM
peripherals
1000+
49. Computer programs are called what?
direct
software
on
analog computers
50. What are the two ways detectors acquire information?
1970s-1990s
raster scan pattern
scanning or array detection
band-pass filtering