SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
0 - 1
high
pixel size
2. Digital detectors are capable of producing ______ shades of gray.
write memory
1000+
little
programs and data
3. What is the name for a binary digit?
bit
2^x
frequency
low-pass filter
4. 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?
pixel
DICOM standard
detector
ENIAC
5. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
programs and data
numerical value
numerical value
200 - 500-1000
6. What was the earliest computer device called?
array detection
increase
fine
abacus
7. Which memory replaces new information with the old; can change?
write memory
peripherals
IR
frequency
8. When subject contrast is high - the acquired data contrast will be ____.
high
Input devices
window level
window level
9. What is high-pass filtering also called?
software
accentuates or suppresses
edge enhancement filtering or sharpening
smaller
10. What does a 0 in binary code stand for?
low-pass - band-pass - and high-pass
decreased
programs and data
off
11. Medical imaging is often achieved from information that has been processed by what?
digital image
mathematical theory - solid-state electronics - and microchip technology
analog-to-digital converters
1-2 lp/mm
12. Each pixel is capable of representing a wide range of what?
window
shades of gray
high
ENIAC
13. What are the two most common output devices?
on
CD or DVD
monitors and printers
two
14. What does DICOM stand for?
byte
shades of gray
digital imaging and communication in medicine
programs and data
15. 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?
read memory
voxel
health level 7
pixel
16. All medical imaging is achieved with which type of computers?
digital computers
voxel
edge enhancement filtering or sharpening
central processing unit
17. 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?
abacus
Input devices
band-pass filtering
noise
18. Computer equipment is called what?
1940s
window width
hardware
CD or DVD
19. What modalities are array processors useful for?
10 megabyte
CT and MRI
pixel
inversely
20. Computers operate from ____ ____ language.
Input devices
binary machine
byte
edge enhancement filtering or sharpening
21. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
high-pass filtering
large amount
magnetic tape
hardware
22. 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?
expansion or compression
band-pass filtering
ENIAC
digital computers
23. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
parallel - serial
inversely
numerical values
band-pass filtering
24. What is the random background information that does not contribute to the image quality?
digital image
bus
noise
CT and MRI
25. Noise is measured as what?
DICOM standard
array processors
signal-to-noise ratio
little
26. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
off
edge enhancement filtering or sharpening
on
27. What are the two ways detectors acquire information?
software
scanning or array detection
smoothing
peripherals
28. What type of scanning increases resolution but can't be used in real-time dynamic studies?
write memory
smaller
slow scanning
reduces
29. What is the frequency response of the incoming signal called?
bandwidth
TV camera
1940s
software
30. Window width and contrast have an ____ relationship.
inverse
10 megabyte
matrix
on
31. What is required for collection of input information?
software
1940s
1940s
detector
32. What modalities are array processors useful for?
CT and MRI
inversely
monitors and printers
progressive scanning
33. When detectors acquire their information by ____ they are receiving info from a specific area.
off
1945
write memory
scanning
34. A larger matrix provides ____ pixels.
smaller
fine
signal-to-noise ratio
read memory
35. A high contrast image has a ___ frequency.
inverse
high
scanning
transverse - sagittal - and coronal
36. Which type of information consists of collected facts?
decrease
data
slow scanning
decreased
37. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
IRs
low-pass filter
frequency
10 megabyte
38. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
large amount
low-pass filter
central processing unit
expansion or compression
39. Which type of information consists of operating instructions?
program
direct
frequency
progressive scanning
40. Which computers handle data composed of continuously varying electrical currents?
binary machine
signal-to-noise ratio
analog computers
200 - 500-1000
41. A low contrast image has a ___ frequency.
low
central processing unit
smoothing
frequency
42. What is the name for an 8-bit word?
byte
off
raster scan pattern
data
43. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
0 - 1
ROM
peripherals
computer - radiographer
44. What is the equation for determining gray scale bit depth?
software
bus speed
2^x
fine
45. What was the earliest computer device called?
DICOM standard
1-2 lp/mm
abacus
window
46. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
decrease
central processing unit
inverse
47. Computerized digital images are described in terms of what
pixel size
program
number of values displayed per image side
magnetic tape
48. When detectors acquire their information by ____ they are receiving info from a specific area.
window
expansion or compression
shades of gray
scanning
49. What does DICOM stand for?
1940s
10 megabyte
digital imaging and communication in medicine
magnetic tape
50. What directs information to and from various parts of the computer?
numerical value
shades of gray
matrix size
central processing unit