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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 random background information that does not contribute to the image quality?
direct
numerical values
voxel
noise
2. 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?
decrease
1970s-1990s
band-pass filtering
little
3. 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?
bus
shades of gray
health level 7
noise
4. Who or What is responsible for density changes on a digital image? On a manual image
digital imaging and communication in medicine
scanning
computer - radiographer
progressive scanning
5. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
central processing unit
numerical value
little
peripherals
6. Noise is ____ related to contrast.
accentuates or suppresses
1970s-1990s
numerical values
inversely
7. In what time period did mathematical theory and solid-state electronics come out?
edge enhancement filtering or sharpening
low-pass - band-pass - and high-pass
data
1940s
8. What are the two types of information computers use?
frequency
programs and data
numerical value
data
9. Digital detectors are capable of producing ______ shades of gray.
IR
200 - 500-1000
1000+
off
10. 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
read memory
peripherals
read memory
11. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
window width
0 - 1
high-pass filtering
parallel - serial
12. Computerized digital images are described in terms of what
programs and data
pixel size
Fourier Transformation
number of values displayed per image side
13. What is an image that has been converted into numerical values for transmission or processing?
noise
DICOM standard
digital image
matrix
14. All medical imaging is achieved with which type of computers?
computers
200 - 500-1000
program
digital computers
15. What does a 1 in binary code stand for?
expansion or compression
on
shades of gray
array detection
16. Computer programs are called what?
computers
software
matrix
detector
17. When subject contrast is high - the acquired data contrast will be ____.
read memory
slow scanning
byte
high
18. 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?
on
byte
increase
transverse - sagittal - and coronal
19. Changes in window width are sometimes called gray scale ____ or ____.
peripherals
fine
expansion or compression
bit
20. 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?
window
scanning
band-pass filtering
health level 7
21. What permit input/output of information to or from the CPU?
detector
pixel size
peripherals
on
22. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
1960s
matrix
progressive scanning
23. The ____ is the heart of the computer while the ___ is the vessels.
two
little
CPU - Bus
inversely
24. What does a 0 in binary code stand for?
mathematical theory - solid-state electronics - and microchip technology
off
matrix
digital computers
25. A __ _____ disk will store over 10000000 bytes of information.
transverse - sagittal - and coronal
peripherals
10 megabyte
IRs
26. Which computers handle data composed of continuously varying electrical currents?
inversely
expansion or compression
analog computers
digital imaging and communication in medicine
27. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
large amount
byte
filtering
voxel
28. 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.
digital computers
bandwidth
CT and MRI
window
29. What changes the pixel value by addition or subtraction and controls image density?
window level
computer - radiographer
1000+
reduces
30. A high contrast image has a ___ frequency.
two
2^x
0 - 1
high
31. What is an individual matrix box or picture element?
pixel
digital computers
RAM
IRs
32. What determines resolution?
10 megabyte
1940s
pixel size
CD or DVD
33. Computer memory is often rated in terms of total ____ memory.
1945
byte
read memory
contrast
34. What are devices that process information?
computers
TV camera
software
window level
35. Window width and contrast have an ____ relationship.
inverse
Input devices
detector
1000+
36. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
inversely
bus
voxel
number of values displayed per image side
37. Each pixel is capable of representing a wide range of what?
voxel
shades of gray
increase
computers
38. 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?
high-pass filtering
signal-to-noise ratio
central processing unit
DICOM standard
39. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
IRs
Input devices
RAM - ROM
TV camera
40. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
voltage
200 - 500-1000
parallel - serial
bit
41. What modalities are array processors useful for?
accentuates or suppresses
2^x
contrast
CT and MRI
42. Window width and contrast have an ____ relationship.
array detection
1000+
inverse
ENIAC
43. Medical imaging is often achieved from information that has been processed by what?
digital imaging and communication in medicine
contrast
analog-to-digital converters
200 - 500-1000
44. What is the 'heart' of every computer?
window
central processing unit
bit
2^x
45. 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?
transverse - sagittal - and coronal
gray scale bit depth
0 - 1
bus
46. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
electronic sources
2^x
pixel size
large amount
47. The quality of the data acquired from the IR is measured by what three data characteristics?
programs and data
bus
frequency - contrast - and noise
array detection
48. What can memory be transferred as?
scanning
increase
voltage
hardware
49. When detectors acquire their information through ____ they are receiving all the info at once.
analog computers
32
bandwidth
array detection
50. Fluoroscopic noise mostly comes from what?
signal-to-noise ratio
electronic sources
1000+
computers