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 modalities are array processors useful for?
TV camera
CT and MRI
accentuates or suppresses
software
2. What type of scanning increases resolution slightly by scanning all 525 lines in order?
magnetic tape
bus speed
progressive scanning
shades of gray
3. Computer memory is often rated in terms of total ____ memory.
Input devices
off
low-pass - band-pass - and high-pass
byte
4. What modalities are array processors useful for?
computers
digital computers
CT and MRI
central processing unit
5. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
slow scanning
array processors
large amount
magnetic tape
6. What is an image that has been converted into numerical values for transmission or processing?
array processors
digital image
2^x
on
7. There is a ___ relationship between subject contrast and acquired data contrast.
direct
fine
array processors
software
8. When subject contrast is high - the acquired data contrast will be ____.
1945
peripherals
noise
high
9. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
contrast
32
low-pass filter
shades of gray
10. Resolution is controlled by what?
ROM
frequency
matrix size
DICOM standard
11. What does a 1 in binary code stand for?
10 megabyte
on
edge enhancement filtering or sharpening
progressive scanning
12. What is the raw data to which a Fourier Transformation is applied to create the digital image?
IR
binary machine
number of values displayed per image side
frequency
13. All medical imaging is achieved with which type of computers?
digital computers
reduces
peripherals
bit
14. What is the frequency response of the incoming signal called?
bandwidth
read memory
memory
digital imaging and communication in medicine
15. What is the 'noisiest' component of a digital system?
ROM
TV camera
high
expansion or compression
16. Computer programs are called what?
digital computers
0 - 1
health level 7
software
17. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
voxel
frequency - contrast - and noise
frequency - contrast - and noise
bus speed
18. What is the random background information that does not contribute to the image quality?
1-2 lp/mm
noise
inversely
ROM
19. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
data
numerical value
high
low-pass filter
20. What is a square series of boxes that gives form to the image?
digital computers
1960s
bus
matrix
21. What is required for collection of input information?
hardware
analog-to-digital converters
detector
parallel - serial
22. Window width and contrast have an ____ relationship.
10 megabyte
inverse
voltage
0 - 1
23. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
bus speed
on
parallel - serial
24. What changes the pixel value by addition or subtraction and controls image density?
window level
off
little
slow scanning
25. 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?
signal-to-noise ratio
analog-to-digital converters
health level 7
detector
26. A __ _____ disk will store over 10000000 bytes of information.
2^x
10 megabyte
detector
high
27. What are the two most common output devices?
hardware
progressive scanning
monitors and printers
array detection
28. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
inversely
edge enhancement filtering or sharpening
voltage
29. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
progressive scanning
1945
smoothing
IR
30. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
analog-to-digital converters
CD or DVD
digital computers
31. What is the mathematical algorithm used to create all medical images?
parallel - serial
window level
Fourier Transformation
byte
32. Each pixel is capable of representing a wide range of what?
bit
ROM
shades of gray
program
33. What is the frequency response of the incoming signal called?
TV camera
magnetic tape
mathematical theory - solid-state electronics - and microchip technology
bandwidth
34. What changes the pixel value by multiplication or division and controls image contrast?
window width
large amount
smoothing
DICOM standard
35. What directs information to and from various parts of the computer?
central processing unit
array processors
low-pass filter
1940s
36. What does DICOM stand for?
off
digital imaging and communication in medicine
electronic sources
bus
37. What type of memory storage devices are required for large amounts of data?
central processing unit
CD or DVD
programs and data
direct
38. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
frequency
RAM - ROM
2^x
39. Digitalization of analog information (increases / reduces) the quality and quantity of information?
central processing unit
raster scan pattern
digital image
reduces
40. What is the name for an 8-bit word?
mathematical theory - solid-state electronics - and microchip technology
high-pass filtering
mathematical theory - solid-state electronics - and microchip technology
byte
41. What is critical to how fast the computer system can function?
bit
programs and data
bus speed
gray scale bit depth
42. In what time period did microchip technology come out?
1960s
digital computers
matrix size
bus
43. A high contrast image has a ___ frequency.
CD or DVD
detector
high
pixel size
44. If window width increases - image contrast will ____.
bit
decrease
memory
health level 7
45. Which computers handle data composed of continuously varying electrical currents?
electronic sources
analog computers
fine
little
46. What is the measure of the differences between the data values referred to as?
on
contrast
numerical value
on
47. When detectors acquire their information through ____ they are receiving all the info at once.
0 - 1
array detection
read memory
greater
48. Which computers handle data composed of continuously varying electrical currents?
bandwidth
TV camera
array detection
analog computers
49. Noise is ____ related to contrast.
frequency - contrast - and noise
byte
digital computers
inversely
50. A larger matrix provides ____ pixels.
high
CT and MRI
bus speed
smaller