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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 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?
10 megabyte
bus
smoothing
memory
2. Binary systems operate with a ___-symbol language.
two
matrix size
memory
0 - 1
3. A larger matrix provides ____ pixels.
low-pass - band-pass - and high-pass
analog computers
inverse
smaller
4. What does a 0 in binary code stand for?
10 megabyte
bus
greater
off
5. Around what time did digital computerization come out for CT and US?
1970s-1990s
CD or DVD
filtering
two
6. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
1940s
scanning
smoothing
little
7. What is the raw data to which a Fourier Transformation is applied to create the digital image?
inversely
frequency
memory
byte
8. If the window level increases - density will _____.
increase
inversely
decreased
CT and MRI
9. What modalities are array processors useful for?
10 megabyte
digital computers
byte
CT and MRI
10. What permit input/output of information to or from the CPU?
Fourier Transformation
1960s
peripherals
CT and MRI
11. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
central processing unit
array processors
bus
raster scan pattern
12. In what time period did mathematical theory and solid-state electronics come out?
bus
1940s
Input devices
1-2 lp/mm
13. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
voxel
low-pass - band-pass - and high-pass
array processors
bus
14. Increased noise = _____ image contrast.
decreased
frequency
abacus
slow scanning
15. When detectors acquire their information through ____ they are receiving all the info at once.
IR
array detection
software
expansion or compression
16. 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.
mathematical theory - solid-state electronics - and microchip technology
digital computers
window
window level
17. Resolution is controlled by what?
transverse - sagittal - and coronal
matrix size
increase
abacus
18. What does DICOM stand for?
frequency
decrease
digital imaging and communication in medicine
array processors
19. What is the name for an 8-bit word?
10 megabyte
hardware
byte
ROM
20. What determines resolution?
smaller
pixel size
digital imaging and communication in medicine
software
21. What is the 'heart' of every computer?
magnetic tape
central processing unit
peripherals
on
22. What is an image that has been converted into numerical values for transmission or processing?
200 - 500-1000
central processing unit
digital image
contrast
23. Which memory replaces new information with the old; can change?
low-pass filter
direct
magnetic tape
write memory
24. What are the two ways detectors acquire information?
decrease
CT and MRI
scanning or array detection
monitors and printers
25. Noise is ____ related to contrast.
array processors
decreased
32
inversely
26. 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?
bus
array detection
1970s-1990s
pixel
27. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
raster scan pattern
ROM
32
bus
28. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
binary machine
digital imaging and communication in medicine
TV camera
parallel - serial
29. If window width increases - image contrast will ____.
software
smoothing
voltage
decrease
30. In what time period did mathematical theory and solid-state electronics come out?
central processing unit
window
little
1940s
31. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
digital computers
matrix size
0 - 1
peripherals
32. A larger matrix provides ____ pixels.
digital computers
parallel - serial
smaller
peripherals
33. What is the frequency response of the incoming signal called?
peripherals
read memory
bandwidth
RAM - ROM
34. Which computers handle data composed of continuously varying electrical currents?
high-pass filtering
analog computers
computer - radiographer
CT and MRI
35. A high contrast image has a ___ frequency.
high
frequency
1970s-1990s
bus speed
36. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
low-pass filter
accentuates or suppresses
200 - 500-1000
array detection
37. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
software
gray scale bit depth
inversely
38. What type of scanning increases resolution slightly by scanning all 525 lines in order?
transverse - sagittal - and coronal
progressive scanning
analog-to-digital converters
central processing unit
39. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
fine
hardware
ROM
40. Fluoroscopic noise mostly comes from what?
window
digital imaging and communication in medicine
0 - 1
electronic sources
41. What are devices that process information?
10 megabyte
abacus
analog-to-digital converters
computers
42. What is an individual matrix box or picture element?
pixel
noise
high
health level 7
43. Digitalization of analog information (increases / reduces) the quality and quantity of information?
peripherals
byte
large amount
reduces
44. 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.
window level
pixel size
CPU - Bus
0 - 1
45. What directs information to and from various parts of the computer?
high-pass filtering
two
scanning or array detection
central processing unit
46. Window width and contrast have an ____ relationship.
RAM
byte
inverse
mathematical theory - solid-state electronics - and microchip technology
47. All medical imaging is achieved with which type of computers?
parallel - serial
bus
digital computers
digital imaging and communication in medicine
48. What are the two most common output devices?
numerical value
filtering
monitors and printers
program
49. 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?
low-pass filter
numerical values
frequency
health level 7
50. Computerized digital images are described in terms of what
edge enhancement filtering or sharpening
ROM
number of values displayed per image side
array processors