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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 are the 3 classifications of digitized image filters?
RAM - ROM
fine
inverse
low-pass - band-pass - and high-pass
2. Increased noise = _____ image contrast.
TV camera
greater
decreased
central processing unit
3. Computers operate from ____ ____ language.
binary machine
inverse
greater
Input devices
4. Noise is ____ related to contrast.
analog computers
little
low-pass - band-pass - and high-pass
inversely
5. What is the equation for determining gray scale bit depth?
abacus
read memory
central processing unit
2^x
6. Each pixel is capable of representing a wide range of what?
data
shades of gray
1-2 lp/mm
voxel
7. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
health level 7
scanning
large amount
data
8. What is high-pass filtering also called?
edge enhancement filtering or sharpening
digital computers
mathematical theory - solid-state electronics - and microchip technology
fine
9. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
window level
software
200 - 500-1000
2^x
10. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
peripherals
RAM
health level 7
digital image
11. In what time period did microchip technology come out?
peripherals
hardware
high
1960s
12. Who or What is responsible for density changes on a digital image? On a manual image
data
computer - radiographer
array detection
1940s
13. What is the 'noisiest' component of a digital system?
TV camera
window width
32
transverse - sagittal - and coronal
14. 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?
1-2 lp/mm
programs and data
edge enhancement filtering or sharpening
bus
15. 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?
computers
frequency - contrast - and noise
health level 7
two
16. When was ENIAC invented?
Input devices
fine
1945
DICOM standard
17. What determines resolution?
pixel size
noise
digital image
mathematical theory - solid-state electronics - and microchip technology
18. Window width and contrast have an ____ relationship.
2^x
inverse
window width
32
19. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
central processing unit
array processors
ROM
number of values displayed per image side
20. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
health level 7
voltage
gray scale bit depth
21. Computer equipment is called what?
10 megabyte
decrease
parallel - serial
hardware
22. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
high
software
200 - 500-1000
programs and data
23. What is the mathematical algorithm used to create all medical images?
memory
band-pass filtering
digital computers
Fourier Transformation
24. 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?
filtering
shades of gray
band-pass filtering
high
25. Which memory can only be extracted without alteration; cannot change?
expansion or compression
expansion or compression
read memory
low
26. What type of memory storage devices are required for large amounts of data?
CD or DVD
software
expansion or compression
smoothing
27. What can memory be transferred as?
voltage
memory
digital image
abacus
28. The ____ is the heart of the computer while the ___ is the vessels.
noise
CPU - Bus
progressive scanning
electronic sources
29. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
high
byte
accentuates or suppresses
30. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
array processors
noise
fine
scanning
31. What was the earliest computer device called?
IRs
abacus
200 - 500-1000
greater
32. Resolution is controlled by what?
number of values displayed per image side
matrix size
2^x
central processing unit
33. What type of memory storage devices are required for large amounts of data?
contrast
CD or DVD
read memory
software
34. What is the information stored as magnetic variations referred to as?
fine
binary machine
memory
progressive scanning
35. 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?
software
decrease
noise
DICOM standard
36. What is the raw data to which a Fourier Transformation is applied to create the digital image?
low-pass - band-pass - and high-pass
numerical value
frequency
smaller
37. Around what time did digital computerization come out for CT and US?
1970s-1990s
CT and MRI
digital imaging and communication in medicine
1000+
38. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
analog computers
1-2 lp/mm
high
pixel
39. If the window level increases - density will _____.
matrix size
low-pass - band-pass - and high-pass
increase
detector
40. What provides specific instructions for calculations and sequential steps to be followed?
detector
frequency - contrast - and noise
decreased
software
41. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
200 - 500-1000
health level 7
high
42. The computer either ____ or ____ selected frequencies during the filtering process.
binary machine
binary machine
accentuates or suppresses
expansion or compression
43. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
direct
1-2 lp/mm
accentuates or suppresses
signal-to-noise ratio
44. The human visual range is ___ or fewer shades of gray.
array processors
32
software
CD or DVD
45. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.
1945
bus speed
0 - 1
gray scale bit depth
46. In what time period did microchip technology come out?
window
parallel - serial
direct
1960s
47. The _____ the matrix size - the better the resolution.
pixel size
magnetic tape
inverse
greater
48. When detectors acquire their information through ____ they are receiving all the info at once.
abacus
health level 7
array detection
high
49. Noise is measured as what?
increase
1960s
signal-to-noise ratio
pixel size
50. Who or What is responsible for density changes on a digital image? On a manual image
parallel - serial
RAM
1-2 lp/mm
computer - radiographer