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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 larger matrix provides ____ pixels.
smaller
1-2 lp/mm
high
1940s
2. Digital detectors are capable of producing ______ shades of gray.
1000+
byte
electronic sources
scanning or array detection
3. What is the 'heart' of every computer?
raster scan pattern
numerical values
central processing unit
high
4. What are the two types of information computers use?
edge enhancement filtering or sharpening
inverse
progressive scanning
programs and data
5. 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?
low-pass - band-pass - and high-pass
DICOM standard
inversely
peripherals
6. What is the name for an 8-bit word?
ROM
byte
DICOM standard
shades of gray
7. What determines resolution?
health level 7
frequency
pixel size
inverse
8. The number of shades of gray is determined by what?
computers
gray scale bit depth
low-pass filter
CT and MRI
9. What input device do radiographers use on a normal basis?
edge enhancement filtering or sharpening
RAM
IRs
window
10. A high contrast image has a ___ frequency.
high
bus speed
little
low
11. A low contrast image has a ___ frequency.
matrix size
low
bandwidth
peripherals
12. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
ROM
1-2 lp/mm
smoothing
parallel - serial
13. What are devices that process information?
central processing unit
computers
low
pixel
14. What does a 1 in binary code stand for?
on
little
scanning or array detection
central processing unit
15. What does a 1 in binary code stand for?
1-2 lp/mm
on
number of values displayed per image side
digital image
16. What is the equation for determining gray scale bit depth?
2^x
program
1945
programs and data
17. 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?
low-pass - band-pass - and high-pass
magnetic tape
health level 7
smaller
18. What is the random background information that does not contribute to the image quality?
array detection
noise
software
frequency
19. A low contrast image has a ___ frequency.
transverse - sagittal - and coronal
reduces
low
band-pass filtering
20. What is a square series of boxes that gives form to the image?
numerical value
noise
scanning
matrix
21. The computer either ____ or ____ selected frequencies during the filtering process.
central processing unit
accentuates or suppresses
peripherals
raster scan pattern
22. Which memory replaces new information with the old; can change?
write memory
0 - 1
software
ROM
23. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
data
voxel
bus
raster scan pattern
24. Which computers handle data composed of definite quantities of current?
inversely
digital computers
detector
hardware
25. What is the measure of the differences between the data values referred to as?
bus
progressive scanning
TV camera
contrast
26. What was the earliest computer device called?
scanning or array detection
abacus
on
1960s
27. What is high-pass filtering also called?
edge enhancement filtering or sharpening
1945
noise
1-2 lp/mm
28. What is the measure of the differences between the data values referred to as?
contrast
central processing unit
bandwidth
raster scan pattern
29. What is the primary limitation with the resolution on digital images?
shades of gray
1945
raster scan pattern
1000+
30. What provides specific instructions for calculations and sequential steps to be followed?
signal-to-noise ratio
central processing unit
matrix size
software
31. What is the name for an 8-bit word?
hardware
byte
frequency - contrast - and noise
1960s
32. Computer programs are called what?
signal-to-noise ratio
direct
software
slow scanning
33. What was the earliest computer device called?
voxel
magnetic tape
voltage
abacus
34. What are the two types of information computers use?
peripherals
programs and data
binary machine
memory
35. Computers operate from ____ ____ language.
10 megabyte
Fourier Transformation
binary machine
high
36. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
parallel - serial
ENIAC
peripherals
shades of gray
37. Changes in window width are sometimes called gray scale ____ or ____.
digital computers
numerical values
Fourier Transformation
expansion or compression
38. Binary systems operate with a ___-symbol language.
two
read memory
peripherals
voxel
39. What does DICOM stand for?
health level 7
transverse - sagittal - and coronal
digital imaging and communication in medicine
contrast
40. What changes the pixel value by multiplication or division and controls image contrast?
digital imaging and communication in medicine
greater
0 - 1
window width
41. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
window level
high
voxel
scanning
42. Noise is ____ related to contrast.
decreased
read memory
magnetic tape
inversely
43. Computer equipment is called what?
software
bus
hardware
filtering
44. Resolution is controlled by what?
high
health level 7
matrix size
200 - 500-1000
45. In what time period did microchip technology come out?
1960s
magnetic tape
parallel - serial
matrix size
46. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
smoothing
reduces
pixel
47. What is required for collection of input information?
monitors and printers
high
detector
IRs
48. What is an image that has been converted into numerical values for transmission or processing?
2^x
inversely
digital image
high
49. What are devices that process information?
detector
programs and data
computers
analog computers
50. When subject contrast is high - the acquired data contrast will be ____.
10 megabyte
gray scale bit depth
RAM - ROM
high