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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 provides specific instructions for calculations and sequential steps to be followed?
increase
RAM
bus
software
2. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
numerical value
matrix
large amount
array processors
3. What is the equation for determining gray scale bit depth?
2^x
CD or DVD
inversely
progressive scanning
4. Which memory replaces new information with the old; can change?
pixel
computers
write memory
window level
5. Computer equipment is called what?
hardware
CT and MRI
programs and data
IR
6. A high contrast image has a ___ frequency.
shades of gray
high
200 - 500-1000
pixel
7. A __ _____ disk will store over 10000000 bytes of information.
gray scale bit depth
array processors
10 megabyte
digital imaging and communication in medicine
8. Resolution is controlled by what?
matrix size
digital computers
off
slow scanning
9. What are the 3 classifications of digitized image filters?
low-pass - band-pass - and high-pass
bus
bandwidth
parallel - serial
10. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
reduces
ENIAC
peripherals
byte
11. All medical imaging is achieved with which type of computers?
bandwidth
mathematical theory - solid-state electronics - and microchip technology
digital computers
matrix size
12. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
TV camera
smoothing
high
0 - 1
13. Computerized digital images are described in terms of what
2^x
number of values displayed per image side
smoothing
signal-to-noise ratio
14. What is the raw data to which a Fourier Transformation is applied to create the digital image?
digital image
on
ROM
frequency
15. When detectors acquire their information by ____ they are receiving info from a specific area.
window
scanning
frequency - contrast - and noise
on
16. What does a 0 in binary code stand for?
1940s
off
bus
mathematical theory - solid-state electronics - and microchip technology
17. Noise is ____ related to contrast.
1-2 lp/mm
peripherals
inversely
Input devices
18. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
memory
Input devices
peripherals
1960s
19. Digital detectors are capable of producing ______ shades of gray.
frequency - contrast - and noise
memory
1000+
contrast
20. What changes the pixel value by addition or subtraction and controls image density?
32
decreased
window level
ENIAC
21. What is the equation for determining gray scale bit depth?
computer - radiographer
2^x
bus
IR
22. The human visual range is ___ or fewer shades of gray.
matrix
mathematical theory - solid-state electronics - and microchip technology
progressive scanning
32
23. What 3 things were required prior to digital computer applications in medical imaging?
magnetic tape
hardware
mathematical theory - solid-state electronics - and microchip technology
200 - 500-1000
24. A high contrast image has a ___ frequency.
decreased
DICOM standard
high
ROM
25. Fluoroscopic noise mostly comes from what?
monitors and printers
low
two
electronic sources
26. When detectors acquire their information through ____ they are receiving all the info at once.
low-pass - band-pass - and high-pass
array detection
monitors and printers
matrix
27. Digitalization of analog information (increases / reduces) the quality and quantity of information?
edge enhancement filtering or sharpening
reduces
2^x
fine
28. The number of shades of gray is determined by what?
pixel
gray scale bit depth
byte
software
29. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
low-pass - band-pass - and high-pass
filtering
1940s
voltage
30. 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?
digital imaging and communication in medicine
transverse - sagittal - and coronal
window width
array detection
31. Computers operate from ____ ____ language.
greater
binary machine
2^x
RAM
32. Which computers handle data composed of continuously varying electrical currents?
voxel
detector
analog computers
little
33. Which type of information consists of operating instructions?
program
digital imaging and communication in medicine
pixel
signal-to-noise ratio
34. 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?
fine
1940s
bus
filtering
35. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
write memory
off
byte
36. What is an individual matrix box or picture element?
pixel
transverse - sagittal - and coronal
on
band-pass filtering
37. When subject contrast is high - the acquired data contrast will be ____.
bus speed
computer - radiographer
off
high
38. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
transverse - sagittal - and coronal
bus
computer - radiographer
39. What is a square series of boxes that gives form to the image?
numerical values
200 - 500-1000
matrix
large amount
40. Computer memory is often rated in terms of total ____ memory.
digital computers
voltage
high
byte
41. A low contrast image has a ___ frequency.
voltage
reduces
low
off
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.
expansion or compression
noise
low-pass filter
computer - radiographer
43. What are the two types of information computers use?
programs and data
voltage
1000+
progressive scanning
44. What are the two most common output devices?
raster scan pattern
2^x
bus speed
monitors and printers
45. What is high-pass filtering also called?
edge enhancement filtering or sharpening
data
1940s
window width
46. In what time period did mathematical theory and solid-state electronics come out?
high
1940s
analog-to-digital converters
IRs
47. Each pixel is capable of representing a wide range of what?
shades of gray
little
data
scanning
48. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
1945
array processors
fine
frequency
49. 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?
slow scanning
fine
program
bus
50. 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.
matrix
window
accentuates or suppresses
health level 7