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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 raw data to which a Fourier Transformation is applied to create the digital image?
high
frequency
CT and MRI
accentuates or suppresses
2. In what time period did mathematical theory and solid-state electronics come out?
program
1940s
CPU - Bus
frequency
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?
two
slow scanning
Fourier Transformation
health level 7
4. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
on
detector
ROM
matrix
5. What was the earliest computer device called?
CT and MRI
abacus
200 - 500-1000
parallel - serial
6. Which memory can only be extracted without alteration; cannot change?
read memory
memory
analog-to-digital converters
software
7. What are the two most common output devices?
two
monitors and printers
1945
analog-to-digital converters
8. What is high-pass filtering also called?
array detection
edge enhancement filtering or sharpening
CPU - Bus
slow scanning
9. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
decrease
read memory
byte
parallel - serial
10. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
read memory
pixel
RAM
ROM
11. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
parallel - serial
bus
high
digital computers
12. What are the 3 classifications of digitized image filters?
digital computers
low-pass - band-pass - and high-pass
voxel
window width
13. When was ENIAC invented?
1945
bit
Input devices
scanning
14. Increased noise = _____ image contrast.
RAM
decreased
high
band-pass filtering
15. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
frequency - contrast - and noise
digital imaging and communication in medicine
RAM
large amount
16. What changes the pixel value by addition or subtraction and controls image density?
window level
200 - 500-1000
high-pass filtering
frequency
17. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
edge enhancement filtering or sharpening
off
voltage
Input devices
18. Computer equipment is called what?
CD or DVD
hardware
array detection
health level 7
19. Which computers handle data composed of definite quantities of current?
software
edge enhancement filtering or sharpening
smoothing
digital computers
20. What directs information to and from various parts of the computer?
1970s-1990s
scanning or array detection
direct
central processing unit
21. A low contrast image has a ___ frequency.
1945
IRs
byte
low
22. What is the information stored as magnetic variations referred to as?
array processors
bandwidth
programs and data
memory
23. If window width increases - image contrast will ____.
binary machine
computers
memory
decrease
24. A larger matrix provides ____ pixels.
pixel size
binary machine
data
smaller
25. Which type of information consists of collected facts?
window
bus
Input devices
data
26. What are the two types of information computers use?
expansion or compression
programs and data
inversely
inverse
27. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
1960s
abacus
frequency - contrast - and noise
numerical values
28. What changes the pixel value by addition or subtraction and controls image density?
1945
software
window level
Fourier Transformation
29. In what time period did mathematical theory and solid-state electronics come out?
progressive scanning
1940s
software
software
30. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
Input devices
shades of gray
accentuates or suppresses
31. What is the random background information that does not contribute to the image quality?
accentuates or suppresses
CD or DVD
gray scale bit depth
noise
32. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
filtering
decrease
0 - 1
33. A high contrast image has a ___ frequency.
high
RAM - ROM
ROM
software
34. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
scanning or array detection
array detection
1-2 lp/mm
gray scale bit depth
35. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
matrix
ENIAC
little
high-pass filtering
36. What are the two ways detectors acquire information?
scanning or array detection
little
raster scan pattern
smaller
37. 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?
IR
CT and MRI
CD or DVD
transverse - sagittal - and coronal
38. When was ENIAC invented?
health level 7
1945
decrease
matrix size
39. What type of scanning increases resolution slightly by scanning all 525 lines in order?
CPU - Bus
smoothing
digital imaging and communication in medicine
progressive scanning
40. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
ROM
little
programs and data
fine
41. What is required for collection of input information?
accentuates or suppresses
computers
detector
on
42. What is the name for a binary digit?
parallel - serial
read memory
2^x
bit
43. What input device do radiographers use on a normal basis?
frequency - contrast - and noise
filtering
off
IRs
44. What does DICOM stand for?
1000+
window width
digital imaging and communication in medicine
IRs
45. What does a 0 in binary code stand for?
matrix size
off
smoothing
matrix
46. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
pixel size
bus
greater
analog computers
47. Which type of information consists of collected facts?
data
bus speed
read memory
10 megabyte
48. What is an image that has been converted into numerical values for transmission or processing?
voxel
digital image
1000+
10 megabyte
49. Computer programs are called what?
software
CPU - Bus
two
IR
50. What permit input/output of information to or from the CPU?
data
peripherals
low-pass filter
array detection