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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. Which type of information consists of collected facts?
data
voxel
bus
frequency - contrast - and noise
2. Which computers handle data composed of continuously varying electrical currents?
binary machine
analog computers
IRs
number of values displayed per image side
3. What is the name for a binary digit?
high
bit
ROM
200 - 500-1000
4. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
increase
reduces
monitors and printers
5. The ____ is the heart of the computer while the ___ is the vessels.
low-pass filter
magnetic tape
CPU - Bus
large amount
6. What type of scanning increases resolution slightly by scanning all 525 lines in order?
abacus
progressive scanning
digital imaging and communication in medicine
bandwidth
7. What input device do radiographers use on a normal basis?
window
two
window level
IRs
8. What determines resolution?
high
high-pass filtering
RAM - ROM
pixel size
9. What is the random background information that does not contribute to the image quality?
high-pass filtering
write memory
noise
pixel size
10. What is the primary limitation with the resolution on digital images?
program
0 - 1
raster scan pattern
parallel - serial
11. What is critical to how fast the computer system can function?
analog-to-digital converters
little
program
bus speed
12. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
1970s-1990s
0 - 1
ROM
parallel - serial
13. What are the two most common output devices?
RAM - ROM
TV camera
byte
monitors and printers
14. What is the name for an 8-bit word?
read memory
shades of gray
analog computers
byte
15. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
detector
bus
digital image
16. Which memory can only be extracted without alteration; cannot change?
read memory
smoothing
health level 7
transverse - sagittal - and coronal
17. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
low-pass filter
array processors
filtering
analog-to-digital converters
18. What determines resolution?
large amount
pixel size
analog-to-digital converters
scanning or array detection
19. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
computers
IR
CPU - Bus
20. What does DICOM stand for?
raster scan pattern
program
digital imaging and communication in medicine
matrix
21. If the window level increases - density will _____.
mathematical theory - solid-state electronics - and microchip technology
hardware
low-pass - band-pass - and high-pass
increase
22. The ____ is the heart of the computer while the ___ is the vessels.
gray scale bit depth
CPU - Bus
contrast
voltage
23. Which memory replaces new information with the old; can change?
bit
computer - radiographer
program
write memory
24. What is required for collection of input information?
detector
voxel
TV camera
memory
25. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
digital computers
window
voxel
1940s
26. What does DICOM stand for?
digital imaging and communication in medicine
computers
on
direct
27. What 3 things were required prior to digital computer applications in medical imaging?
progressive scanning
mathematical theory - solid-state electronics - and microchip technology
program
array processors
28. What does a 0 in binary code stand for?
1960s
magnetic tape
1-2 lp/mm
off
29. What is the mathematical algorithm used to create all medical images?
hardware
low-pass - band-pass - and high-pass
memory
Fourier Transformation
30. 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?
band-pass filtering
large amount
central processing unit
bus
31. In what time period did mathematical theory and solid-state electronics come out?
1940s
bus speed
signal-to-noise ratio
expansion or compression
32. 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?
health level 7
pixel
1-2 lp/mm
Fourier Transformation
33. The number of shades of gray is determined by what?
gray scale bit depth
CD or DVD
DICOM standard
data
34. Computer programs are called what?
numerical value
software
scanning or array detection
abacus
35. What modalities are array processors useful for?
analog-to-digital converters
bus
analog-to-digital converters
CT and MRI
36. What are devices that process information?
computers
noise
filtering
1-2 lp/mm
37. What input device do radiographers use on a normal basis?
IRs
abacus
greater
1960s
38. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
memory
shades of gray
computers
200 - 500-1000
39. What is the equation for determining gray scale bit depth?
read memory
software
1940s
2^x
40. Digital detectors are capable of producing ______ shades of gray.
bus
1000+
Input devices
decrease
41. Increased noise = _____ image contrast.
binary machine
magnetic tape
bandwidth
decreased
42. What does a 0 in binary code stand for?
decrease
numerical value
off
ENIAC
43. A high contrast image has a ___ frequency.
high
ROM
software
memory
44. A high S/N indicates ___ noise in the image.
little
progressive scanning
digital computers
software
45. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
digital computers
bus
filtering
DICOM standard
46. When detectors acquire their information through ____ they are receiving all the info at once.
ROM
array detection
high-pass filtering
scanning
47. When was ENIAC invented?
1945
software
digital computers
TV camera
48. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
1-2 lp/mm
window level
RAM - ROM
transverse - sagittal - and coronal
49. What is the name of the 'modern electronic computer'?
programs and data
CD or DVD
inverse
ENIAC
50. In what time period did mathematical theory and solid-state electronics come out?
1940s
1-2 lp/mm
gray scale bit depth
scanning