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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. A __ _____ disk will store over 10000000 bytes of information.
write memory
10 megabyte
low-pass - band-pass - and high-pass
band-pass filtering
2. 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?
1-2 lp/mm
write memory
health level 7
low-pass filter
3. What is the frequency response of the incoming signal called?
accentuates or suppresses
bandwidth
read memory
scanning
4. The computer either ____ or ____ selected frequencies during the filtering process.
frequency - contrast - and noise
array processors
accentuates or suppresses
number of values displayed per image side
5. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
large amount
low
fine
transverse - sagittal - and coronal
6. The computer either ____ or ____ selected frequencies during the filtering process.
matrix
accentuates or suppresses
digital imaging and communication in medicine
edge enhancement filtering or sharpening
7. What directs information to and from various parts of the computer?
large amount
central processing unit
analog-to-digital converters
digital image
8. What is the name for a binary digit?
bit
1000+
large amount
inverse
9. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
peripherals
1940s
scanning or array detection
smoothing
10. Which memory can only be extracted without alteration; cannot change?
greater
bus
bus speed
read memory
11. Which memory replaces new information with the old; can change?
window width
inverse
write memory
Fourier Transformation
12. Computer equipment is called what?
high
TV camera
hardware
byte
13. What 3 things were required prior to digital computer applications in medical imaging?
mathematical theory - solid-state electronics - and microchip technology
analog computers
IR
numerical values
14. 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?
IRs
DICOM standard
computer - radiographer
voltage
15. What is an individual matrix box or picture element?
pixel
high-pass filtering
smoothing
digital imaging and communication in medicine
16. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
program
low-pass filter
array processors
10 megabyte
17. If the window level increases - density will _____.
two
increase
10 megabyte
noise
18. What is an image that has been converted into numerical values for transmission or processing?
filtering
digital image
progressive scanning
analog-to-digital converters
19. What is the name for a binary digit?
bit
200 - 500-1000
progressive scanning
programs and data
20. Binary systems operate with a ___-symbol language.
two
200 - 500-1000
analog computers
monitors and printers
21. Who or What is responsible for density changes on a digital image? On a manual image
large amount
software
computer - radiographer
digital image
22. Which computers handle data composed of definite quantities of current?
byte
ENIAC
digital computers
accentuates or suppresses
23. What does DICOM stand for?
CD or DVD
window level
bus
digital imaging and communication in medicine
24. Computers operate from ____ ____ language.
inverse
bit
binary machine
scanning
25. Noise is measured as what?
signal-to-noise ratio
software
voxel
computer - radiographer
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?
accentuates or suppresses
number of values displayed per image side
shades of gray
bus
27. What type of memory storage devices are required for large amounts of data?
on
CD or DVD
bus
memory
28. When detectors acquire their information through ____ they are receiving all the info at once.
digital image
byte
IR
array detection
29. What is the 'heart' of every computer?
central processing unit
CD or DVD
software
Input devices
30. Modalities differ in bit depth that is available depending on the capabilities of what?
numerical values
Fourier Transformation
IR
byte
31. What is required for collection of input information?
electronic sources
200 - 500-1000
detector
accentuates or suppresses
32. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
data
computer - radiographer
byte
33. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
1945
200 - 500-1000
RAM
magnetic tape
34. When was ENIAC invented?
1945
write memory
ENIAC
progressive scanning
35. What is the name for an 8-bit word?
byte
increase
electronic sources
pixel size
36. Digitalization of analog information (increases / reduces) the quality and quantity of information?
shades of gray
analog computers
reduces
matrix
37. If window width increases - image contrast will ____.
numerical value
decrease
inverse
detector
38. Who or What is responsible for density changes on a digital image? On a manual image
inversely
computer - radiographer
pixel size
1960s
39. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
low-pass filter
RAM - ROM
parallel - serial
bit
40. What changes the pixel value by addition or subtraction and controls image density?
shades of gray
window width
window level
IRs
41. Which memory replaces new information with the old; can change?
bandwidth
write memory
bus
pixel
42. What does a 0 in binary code stand for?
off
low-pass - band-pass - and high-pass
raster scan pattern
bus
43. Computer programs are called what?
electronic sources
1970s-1990s
software
TV camera
44. A larger matrix provides ____ pixels.
1-2 lp/mm
smaller
pixel size
IR
45. What are the two ways detectors acquire information?
mathematical theory - solid-state electronics - and microchip technology
inverse
scanning or array detection
slow scanning
46. The human visual range is ___ or fewer shades of gray.
computers
scanning or array detection
computers
32
47. A high contrast image has a ___ frequency.
1970s-1990s
decrease
high
central processing unit
48. Medical imaging is often achieved from information that has been processed by what?
write memory
programs and data
analog-to-digital converters
array processors
49. The ____ is the heart of the computer while the ___ is the vessels.
greater
computers
low-pass - band-pass - and high-pass
CPU - Bus
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.
electronic sources
low-pass filter
gray scale bit depth
frequency