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 determines resolution?
32
pixel size
detector
accentuates or suppresses
2. If the window level increases - density will _____.
decreased
increase
pixel
reduces
3. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
low-pass - band-pass - and high-pass
ROM
32
IRs
4. Computers operate from ____ ____ language.
bus speed
electronic sources
analog computers
binary machine
5. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
1970s-1990s
numerical values
CD or DVD
6. What type of scanning increases resolution slightly by scanning all 525 lines in order?
1940s
progressive scanning
bus
smoothing
7. When subject contrast is high - the acquired data contrast will be ____.
edge enhancement filtering or sharpening
ENIAC
peripherals
high
8. What is the information stored as magnetic variations referred to as?
memory
on
software
transverse - sagittal - and coronal
9. A high S/N indicates ___ noise in the image.
electronic sources
analog-to-digital converters
little
window width
10. When was ENIAC invented?
high
1945
200 - 500-1000
DICOM standard
11. What changes the pixel value by addition or subtraction and controls image density?
window level
raster scan pattern
peripherals
inverse
12. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
edge enhancement filtering or sharpening
health level 7
program
high-pass filtering
13. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
IR
direct
magnetic tape
DICOM standard
14. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
smoothing
program
expansion or compression
15. What is the information stored as magnetic variations referred to as?
scanning or array detection
memory
bit
monitors and printers
16. In what time period did mathematical theory and solid-state electronics come out?
1940s
peripherals
software
high-pass filtering
17. When detectors acquire their information through ____ they are receiving all the info at once.
1000+
two
array detection
band-pass filtering
18. What is the system of conductors that connects the various components of a computer system and permits the CPU to accept inputs from any point along the conductor?
peripherals
software
digital image
bus
19. What changes the pixel value by multiplication or division and controls image contrast?
array detection
signal-to-noise ratio
matrix
window width
20. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
signal-to-noise ratio
band-pass filtering
200 - 500-1000
memory
21. What is required for collection of input information?
high-pass filtering
detector
progressive scanning
bus
22. Which computers handle data composed of continuously varying electrical currents?
analog computers
inverse
high-pass filtering
expansion or compression
23. What are the two most common output devices?
memory
direct
bit
monitors and printers
24. What provides specific instructions for calculations and sequential steps to be followed?
software
bus speed
RAM
decreased
25. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
central processing unit
smaller
bus
26. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
array processors
decrease
RAM
digital computers
27. Computer programs are called what?
parallel - serial
software
signal-to-noise ratio
TV camera
28. What is the frequency response of the incoming signal called?
32
band-pass filtering
1940s
bandwidth
29. Which type of information consists of collected facts?
byte
data
mathematical theory - solid-state electronics - and microchip technology
CD or DVD
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?
200 - 500-1000
signal-to-noise ratio
pixel
band-pass filtering
31. What is the mathematical algorithm used to create all medical images?
window
1940s
low
Fourier Transformation
32. The quality of the data acquired from the IR is measured by what three data characteristics?
computer - radiographer
scanning or array detection
edge enhancement filtering or sharpening
frequency - contrast - and noise
33. What are the 3 classifications of digitized image filters?
digital image
CD or DVD
Fourier Transformation
low-pass - band-pass - and high-pass
34. Who or What is responsible for density changes on a digital image? On a manual image
on
computer - radiographer
DICOM standard
DICOM standard
35. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
increase
window width
32
36. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
computers
programs and data
bus
memory
37. 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?
2^x
0 - 1
high-pass filtering
DICOM standard
38. When was ENIAC invented?
2^x
1945
number of values displayed per image side
CD or DVD
39. Around what time did digital computerization come out for CT and US?
smaller
gray scale bit depth
1970s-1990s
0 - 1
40. It is important that the radiographer understand anatomy from different perspectives due to the methods of digital processing and image information? What are the 3 perspectives?
low
transverse - sagittal - and coronal
peripherals
write memory
41. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
bus
bit
mathematical theory - solid-state electronics - and microchip technology
numerical value
42. The ____ is the heart of the computer while the ___ is the vessels.
digital computers
window
reduces
CPU - Bus
43. Which memory can only be extracted without alteration; cannot change?
increase
low-pass - band-pass - and high-pass
raster scan pattern
read memory
44. In what time period did mathematical theory and solid-state electronics come out?
bandwidth
matrix size
byte
1940s
45. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
programs and data
expansion or compression
array processors
ROM
46. What are the 3 classifications of digitized image filters?
10 megabyte
IR
increase
low-pass - band-pass - and high-pass
47. Each pixel is capable of representing a wide range of what?
digital image
reduces
shades of gray
data
48. The ____ is the heart of the computer while the ___ is the vessels.
scanning or array detection
scanning
CPU - Bus
voltage
49. If the window level increases - density will _____.
Fourier Transformation
increase
voltage
programs and data
50. Binary systems operate with a ___-symbol language.
two
window level
central processing unit
decrease