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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. Medical imaging is often achieved from information that has been processed by what?
1970s-1990s
low-pass - band-pass - and high-pass
numerical value
analog-to-digital converters
2. What directs information to and from various parts of the computer?
1-2 lp/mm
central processing unit
32
peripherals
3. When detectors acquire their information by ____ they are receiving info from a specific area.
number of values displayed per image side
scanning
200 - 500-1000
high-pass filtering
4. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
accentuates or suppresses
array processors
band-pass filtering
filtering
5. The number of shades of gray is determined by what?
gray scale bit depth
two
digital computers
transverse - sagittal - and coronal
6. What is a square series of boxes that gives form to the image?
matrix
software
ENIAC
computers
7. What can memory be transferred as?
increase
voltage
IR
window width
8. 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?
little
health level 7
two
accentuates or suppresses
9. When was ENIAC invented?
1945
32
DICOM standard
analog computers
10. A __ _____ disk will store over 10000000 bytes of information.
10 megabyte
numerical values
scanning or array detection
digital image
11. Digitalization of analog information (increases / reduces) the quality and quantity of information?
peripherals
off
reduces
0 - 1
12. A __ _____ disk will store over 10000000 bytes of information.
analog-to-digital converters
1940s
little
10 megabyte
13. What is the name of the 'modern electronic computer'?
ENIAC
gray scale bit depth
CPU - Bus
byte
14. What is an image that has been converted into numerical values for transmission or processing?
digital image
200 - 500-1000
high-pass filtering
peripherals
15. Noise is ____ related to contrast.
bandwidth
32
pixel size
inversely
16. Which computers handle data composed of continuously varying electrical currents?
on
digital image
write memory
analog computers
17. A low contrast image has a ___ frequency.
low
increase
parallel - serial
array detection
18. What does DICOM stand for?
inverse
digital imaging and communication in medicine
frequency
1970s-1990s
19. What are the 3 classifications of digitized image filters?
frequency
1-2 lp/mm
low-pass - band-pass - and high-pass
pixel size
20. What are the two ways detectors acquire information?
gray scale bit depth
noise
edge enhancement filtering or sharpening
scanning or array detection
21. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
magnetic tape
large amount
low-pass - band-pass - and high-pass
raster scan pattern
22. What permit input/output of information to or from the CPU?
high
ENIAC
peripherals
scanning or array detection
23. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
ROM
bus
central processing unit
array processors
24. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
pixel
peripherals
low-pass - band-pass - and high-pass
2^x
25. What is an image that has been converted into numerical values for transmission or processing?
digital image
bandwidth
abacus
slow scanning
26. A larger matrix provides ____ pixels.
bit
on
off
smaller
27. What determines resolution?
on
pixel size
parallel - serial
1-2 lp/mm
28. What directs information to and from various parts of the computer?
health level 7
little
central processing unit
ENIAC
29. The ____ is the heart of the computer while the ___ is the vessels.
high
programs and data
CPU - Bus
low-pass filter
30. Noise is measured as what?
signal-to-noise ratio
software
1-2 lp/mm
off
31. What does a 0 in binary code stand for?
peripherals
matrix size
off
1000+
32. Resolution is controlled by what?
bandwidth
matrix size
32
low-pass - band-pass - and high-pass
33. Digitalization of analog information (increases / reduces) the quality and quantity of information?
contrast
reduces
monitors and printers
frequency - contrast - and noise
34. What are the two ways detectors acquire information?
RAM - ROM
200 - 500-1000
analog-to-digital converters
scanning or array detection
35. Which computers handle data composed of definite quantities of current?
RAM - ROM
digital computers
edge enhancement filtering or sharpening
array detection
36. The ____ is the heart of the computer while the ___ is the vessels.
data
CPU - Bus
contrast
pixel size
37. A high contrast image has a ___ frequency.
greater
high
voxel
parallel - serial
38. Computerized digital images are described in terms of what
number of values displayed per image side
voltage
parallel - serial
RAM - ROM
39. 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
inverse
mathematical theory - solid-state electronics - and microchip technology
digital image
40. If window width increases - image contrast will ____.
noise
1-2 lp/mm
accentuates or suppresses
decrease
41. Changes in window width are sometimes called gray scale ____ or ____.
voltage
pixel
expansion or compression
numerical values
42. What is the frequency response of the incoming signal called?
CT and MRI
bandwidth
raster scan pattern
decrease
43. Fluoroscopic noise mostly comes from what?
electronic sources
voltage
gray scale bit depth
filtering
44. Computer memory is often rated in terms of total ____ memory.
analog-to-digital converters
byte
IR
mathematical theory - solid-state electronics - and microchip technology
45. What 3 things were required prior to digital computer applications in medical imaging?
abacus
1940s
pixel size
mathematical theory - solid-state electronics - and microchip technology
46. Which memory can only be extracted without alteration; cannot change?
CPU - Bus
bus
progressive scanning
read memory
47. Computerized digital images are described in terms of what
number of values displayed per image side
frequency
0 - 1
1000+
48. The human visual range is ___ or fewer shades of gray.
32
low-pass - band-pass - and high-pass
large amount
mathematical theory - solid-state electronics - and microchip technology
49. What changes the pixel value by multiplication or division and controls image contrast?
1-2 lp/mm
pixel
numerical values
window width
50. 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
digital computers
progressive scanning
high-pass filtering