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. Which memory can only be extracted without alteration; cannot change?
decrease
analog-to-digital converters
read memory
scanning or array detection
2. If window width increases - image contrast will ____.
CD or DVD
low-pass - band-pass - and high-pass
decrease
numerical values
3. What does DICOM stand for?
filtering
write memory
digital imaging and communication in medicine
200 - 500-1000
4. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
filtering
data
slow scanning
window
5. What directs information to and from various parts of the computer?
central processing unit
monitors and printers
ENIAC
2^x
6. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
1-2 lp/mm
magnetic tape
ENIAC
CD or DVD
7. Noise is ____ related to contrast.
1-2 lp/mm
smoothing
inversely
IR
8. What permit input/output of information to or from the CPU?
peripherals
pixel
32
1960s
9. In what time period did mathematical theory and solid-state electronics come out?
IRs
frequency - contrast - and noise
1940s
greater
10. Because electrical currents are understood as being either on or off - the binary system consists of information recorded as either a _ for off or a _ for on.
electronic sources
low
low-pass - band-pass - and high-pass
0 - 1
11. What is an image that has been converted into numerical values for transmission or processing?
1945
1000+
digital image
scanning or array detection
12. Which memory can only be extracted without alteration; cannot change?
read memory
slow scanning
software
large amount
13. What is the measure of the differences between the data values referred to as?
contrast
number of values displayed per image side
low
window
14. The _____ the matrix size - the better the resolution.
slow scanning
bandwidth
greater
noise
15. All medical imaging is achieved with which type of computers?
0 - 1
pixel
digital imaging and communication in medicine
digital computers
16. What type of memory storage devices are required for large amounts of data?
Fourier Transformation
decrease
computer - radiographer
CD or DVD
17. What changes the pixel value by multiplication or division and controls image contrast?
IRs
2^x
read memory
window width
18. Computerized digital images are described in terms of what
number of values displayed per image side
raster scan pattern
numerical value
frequency
19. Increased noise = _____ image contrast.
decreased
analog computers
band-pass filtering
bus speed
20. Noise is measured as what?
peripherals
off
signal-to-noise ratio
monitors and printers
21. The ____ is the heart of the computer while the ___ is the vessels.
TV camera
byte
decreased
CPU - Bus
22. Modalities differ in bit depth that is available depending on the capabilities of what?
programs and data
RAM
bit
IR
23. What is the mathematical algorithm used to create all medical images?
central processing unit
Fourier Transformation
10 megabyte
program
24. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
2^x
1940s
1-2 lp/mm
numerical value
25. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
fine
transverse - sagittal - and coronal
computer - radiographer
CD or DVD
26. When detectors acquire their information by ____ they are receiving info from a specific area.
computers
1-2 lp/mm
high
scanning
27. A __ _____ disk will store over 10000000 bytes of information.
bus
array detection
scanning or array detection
10 megabyte
28. What permit input/output of information to or from the CPU?
numerical values
number of values displayed per image side
peripherals
2^x
29. The number of shades of gray is determined by what?
voltage
software
gray scale bit depth
data
30. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
digital computers
contrast
1940s
RAM
31. Which type of information consists of collected facts?
write memory
CPU - Bus
IR
data
32. When detectors acquire their information by ____ they are receiving info from a specific area.
digital image
scanning
mathematical theory - solid-state electronics - and microchip technology
increase
33. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
central processing unit
analog-to-digital converters
voxel
34. What are the two ways detectors acquire information?
Input devices
inversely
scanning or array detection
programs and data
35. If the window level increases - density will _____.
increase
programs and data
array detection
fine
36. If the window level increases - density will _____.
edge enhancement filtering or sharpening
increase
mathematical theory - solid-state electronics - and microchip technology
window width
37. Which memory replaces new information with the old; can change?
write memory
digital computers
ENIAC
bit
38. A low contrast image has a ___ frequency.
two
high
low
noise
39. Around what time did digital computerization come out for CT and US?
RAM
window level
1970s-1990s
bus speed
40. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
number of values displayed per image side
read memory
inverse
200 - 500-1000
41. What is the raw data to which a Fourier Transformation is applied to create the digital image?
increase
frequency
inverse
low
42. What is required for collection of input information?
decrease
magnetic tape
analog computers
detector
43. What is the name for a binary digit?
direct
bit
hardware
10 megabyte
44. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
window level
numerical value
gray scale bit depth
1970s-1990s
45. What was the earliest computer device called?
0 - 1
1940s
abacus
0 - 1
46. What is the name of the 'modern electronic computer'?
ENIAC
filtering
large amount
1-2 lp/mm
47. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
parallel - serial
peripherals
filtering
accentuates or suppresses
48. Computer equipment is called what?
computers
hardware
bandwidth
32
49. What 3 things were required prior to digital computer applications in medical imaging?
byte
raster scan pattern
mathematical theory - solid-state electronics - and microchip technology
low
50. The human visual range is ___ or fewer shades of gray.
32
inversely
abacus
1-2 lp/mm