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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. If window width increases - image contrast will ____.
memory
magnetic tape
decrease
array processors
2. Noise is measured as what?
signal-to-noise ratio
bandwidth
memory
hardware
3. Digital detectors are capable of producing ______ shades of gray.
abacus
1000+
1945
contrast
4. When was ENIAC invented?
off
1945
CT and MRI
hardware
5. Noise is ____ related to contrast.
ROM
mathematical theory - solid-state electronics - and microchip technology
inversely
peripherals
6. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
fine
inversely
digital computers
shades of gray
7. Which computers handle data composed of continuously varying electrical currents?
bit
raster scan pattern
window
analog computers
8. What directs information to and from various parts of the computer?
window width
decreased
central processing unit
digital computers
9. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
RAM - ROM
array detection
IRs
numerical value
10. Computer equipment is called what?
bus
hardware
central processing unit
central processing unit
11. 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?
transverse - sagittal - and coronal
health level 7
raster scan pattern
decreased
12. All medical imaging is achieved with which type of computers?
IR
low-pass - band-pass - and high-pass
large amount
digital computers
13. Computerized digital images are described in terms of what
detector
matrix
number of values displayed per image side
inversely
14. Noise is ____ related to contrast.
CD or DVD
array processors
inversely
smoothing
15. What does a 1 in binary code stand for?
voxel
analog-to-digital converters
on
RAM
16. The quality of the data acquired from the IR is measured by what three data characteristics?
digital computers
CD or DVD
voxel
frequency - contrast - and noise
17. What is the 'noisiest' component of a digital system?
TV camera
raster scan pattern
1000+
abacus
18. A high contrast image has a ___ frequency.
filtering
numerical value
slow scanning
high
19. What is the 'noisiest' component of a digital system?
TV camera
digital computers
peripherals
analog-to-digital converters
20. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
software
decreased
ROM
frequency
21. What is the 'heart' of every computer?
CD or DVD
central processing unit
transverse - sagittal - and coronal
shades of gray
22. In what time period did microchip technology come out?
mathematical theory - solid-state electronics - and microchip technology
matrix size
numerical value
1960s
23. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
high-pass filtering
RAM - ROM
window
ENIAC
24. 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?
DICOM standard
health level 7
programs and data
window level
25. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
CD or DVD
window level
number of values displayed per image side
large amount
26. What is the frequency response of the incoming signal called?
numerical value
frequency
high
bandwidth
27. Changes in window width are sometimes called gray scale ____ or ____.
accentuates or suppresses
expansion or compression
CT and MRI
write memory
28. Modalities differ in bit depth that is available depending on the capabilities of what?
monitors and printers
large amount
high
IR
29. Binary systems operate with a ___-symbol language.
progressive scanning
smaller
two
magnetic tape
30. Window width and contrast have an ____ relationship.
abacus
0 - 1
computers
inverse
31. What input device do radiographers use on a normal basis?
numerical values
health level 7
IRs
peripherals
32. What is the measure of the differences between the data values referred to as?
matrix
edge enhancement filtering or sharpening
contrast
peripherals
33. When detectors acquire their information through ____ they are receiving all the info at once.
noise
array detection
computer - radiographer
memory
34. What are the 3 classifications of digitized image filters?
accentuates or suppresses
scanning or array detection
progressive scanning
low-pass - band-pass - and high-pass
35. 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?
byte
health level 7
computers
transverse - sagittal - and coronal
36. The quality of the data acquired from the IR is measured by what three data characteristics?
CPU - Bus
read memory
byte
frequency - contrast - and noise
37. What does DICOM stand for?
memory
low-pass filter
read memory
digital imaging and communication in medicine
38. A high contrast image has a ___ frequency.
noise
high
smoothing
1960s
39. What is high-pass filtering also called?
scanning or array detection
frequency
slow scanning
edge enhancement filtering or sharpening
40. What is the information stored as magnetic variations referred to as?
off
read memory
memory
TV camera
41. A high S/N indicates ___ noise in the image.
off
shades of gray
little
digital computers
42. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
two
1960s
numerical values
software
43. What is the primary limitation with the resolution on digital images?
raster scan pattern
large amount
direct
bus speed
44. What are the two most common output devices?
high
RAM
monitors and printers
contrast
45. What permit input/output of information to or from the CPU?
peripherals
abacus
analog computers
data
46. What is the information stored as magnetic variations referred to as?
hardware
two
voxel
memory
47. What provides specific instructions for calculations and sequential steps to be followed?
software
gray scale bit depth
frequency - contrast - and noise
reduces
48. The human visual range is ___ or fewer shades of gray.
decreased
two
central processing unit
32
49. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
0 - 1
bit
little
50. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
1940s
Input devices
RAM
monitors and printers