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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 the measure of the differences between the data values referred to as?
0 - 1
raster scan pattern
contrast
program
2. What are the two ways detectors acquire information?
edge enhancement filtering or sharpening
magnetic tape
scanning or array detection
CD or DVD
3. Window width and contrast have an ____ relationship.
inverse
transverse - sagittal - and coronal
binary machine
smaller
4. The number of shades of gray is determined by what?
gray scale bit depth
voxel
window level
transverse - sagittal - and coronal
5. What is critical to how fast the computer system can function?
bus speed
shades of gray
fine
low
6. Changes in window width are sometimes called gray scale ____ or ____.
expansion or compression
parallel - serial
signal-to-noise ratio
inversely
7. What can memory be transferred as?
increase
bit
noise
voltage
8. 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?
high
transverse - sagittal - and coronal
bandwidth
central processing unit
9. What are the 3 classifications of digitized image filters?
parallel - serial
program
low-pass - band-pass - and high-pass
scanning
10. What is the equation for determining gray scale bit depth?
voxel
1945
Fourier Transformation
2^x
11. What modalities are array processors useful for?
bus
window
software
CT and MRI
12. What is high-pass filtering also called?
contrast
fine
edge enhancement filtering or sharpening
off
13. What is the 'heart' of every computer?
central processing unit
high
digital computers
Fourier Transformation
14. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ENIAC
IR
ROM
numerical values
15. The number of shades of gray is determined by what?
gray scale bit depth
parallel - serial
health level 7
decrease
16. Who or What is responsible for density changes on a digital image? On a manual image
computer - radiographer
smaller
2^x
electronic sources
17. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
direct
peripherals
data
array detection
18. Modalities differ in bit depth that is available depending on the capabilities of what?
ROM
IR
low-pass filter
smaller
19. When subject contrast is high - the acquired data contrast will be ____.
software
inverse
parallel - serial
high
20. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
frequency
program
array processors
transverse - sagittal - and coronal
21. 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?
CPU - Bus
health level 7
digital imaging and communication in medicine
edge enhancement filtering or sharpening
22. If window width increases - image contrast will ____.
decrease
byte
software
byte
23. What type of scanning increases resolution slightly by scanning all 525 lines in order?
ROM
voxel
1940s
progressive scanning
24. Which computers handle data composed of definite quantities of current?
inverse
bit
digital computers
off
25. What type of scanning increases resolution slightly by scanning all 525 lines in order?
byte
progressive scanning
high-pass filtering
high
26. What does a 0 in binary code stand for?
off
matrix
progressive scanning
high-pass filtering
27. What is the mathematical algorithm used to create all medical images?
signal-to-noise ratio
programs and data
memory
Fourier Transformation
28. What does DICOM stand for?
digital imaging and communication in medicine
central processing unit
digital computers
matrix
29. What is an individual matrix box or picture element?
shades of gray
programs and data
direct
pixel
30. What is the frequency response of the incoming signal called?
2^x
analog-to-digital converters
bandwidth
filtering
31. Binary systems operate with a ___-symbol language.
IR
two
1970s-1990s
frequency - contrast - and noise
32. Noise is ____ related to contrast.
digital imaging and communication in medicine
inversely
1960s
array processors
33. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
voxel
transverse - sagittal - and coronal
software
bit
34. The human visual range is ___ or fewer shades of gray.
contrast
32
window
abacus
35. What are the two most common output devices?
1960s
monitors and printers
inverse
parallel - serial
36. What is the measure of the differences between the data values referred to as?
low-pass filter
contrast
increase
program
37. Digital detectors are capable of producing ______ shades of gray.
analog computers
1000+
matrix
inverse
38. What permit input/output of information to or from the CPU?
frequency
digital computers
peripherals
fine
39. What type of scanning increases resolution but can't be used in real-time dynamic studies?
electronic sources
slow scanning
voltage
analog computers
40. Which type of information consists of collected facts?
shades of gray
low-pass filter
data
parallel - serial
41. What 3 things were required prior to digital computer applications in medical imaging?
peripherals
mathematical theory - solid-state electronics - and microchip technology
ROM
fine
42. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
bit
reduces
computers
low-pass filter
43. In what time period did microchip technology come out?
1960s
monitors and printers
edge enhancement filtering or sharpening
two
44. The human visual range is ___ or fewer shades of gray.
ROM
inverse
32
IR
45. Resolution is controlled by what?
matrix size
detector
two
off
46. What is a square series of boxes that gives form to the image?
raster scan pattern
low
pixel size
matrix
47. Which memory replaces new information with the old; can change?
software
noise
low-pass - band-pass - and high-pass
write memory
48. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
ROM
numerical value
noise
RAM
49. What type of memory storage devices are required for large amounts of data?
CD or DVD
voxel
numerical value
programs and data
50. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
computer - radiographer
number of values displayed per image side
inverse
low-pass filter