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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. When detectors acquire their information through ____ they are receiving all the info at once.
scanning or array detection
gray scale bit depth
array detection
1-2 lp/mm
2. What is the name of the 'modern electronic computer'?
low
two
DICOM standard
ENIAC
3. What changes the pixel value by addition or subtraction and controls image density?
Fourier Transformation
window level
accentuates or suppresses
1970s-1990s
4. Noise is ____ related to contrast.
two
memory
analog computers
inversely
5. 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.
array detection
inverse
0 - 1
number of values displayed per image side
6. 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?
1970s-1990s
band-pass filtering
bus speed
number of values displayed per image side
7. What is the raw data to which a Fourier Transformation is applied to create the digital image?
frequency
CT and MRI
inversely
1-2 lp/mm
8. What is the primary limitation with the resolution on digital images?
smoothing
raster scan pattern
direct
bus
9. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
band-pass filtering
digital imaging and communication in medicine
direct
10. What is the name for an 8-bit word?
ROM
reduces
byte
binary machine
11. What is the name of the 'modern electronic computer'?
raster scan pattern
ENIAC
direct
parallel - serial
12. Modalities differ in bit depth that is available depending on the capabilities of what?
CPU - Bus
IR
2^x
byte
13. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
voltage
pixel size
low-pass filter
1970s-1990s
14. What is an image that has been converted into numerical values for transmission or processing?
voxel
digital image
programs and data
0 - 1
15. What type of memory storage devices are required for large amounts of data?
peripherals
raster scan pattern
CD or DVD
analog computers
16. When was ENIAC invented?
greater
accentuates or suppresses
digital computers
1945
17. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
monitors and printers
magnetic tape
byte
peripherals
18. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
signal-to-noise ratio
TV camera
central processing unit
ROM
19. Noise is measured as what?
monitors and printers
ROM
signal-to-noise ratio
transverse - sagittal - and coronal
20. 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?
inversely
noise
memory
health level 7
21. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
digital computers
digital imaging and communication in medicine
RAM - ROM
shades of gray
22. What provides specific instructions for calculations and sequential steps to be followed?
software
contrast
direct
high
23. When subject contrast is high - the acquired data contrast will be ____.
high
frequency
1960s
mathematical theory - solid-state electronics - and microchip technology
24. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
computers
central processing unit
window
large amount
25. What permit input/output of information to or from the CPU?
programs and data
voltage
peripherals
numerical value
26. All medical imaging is achieved with which type of computers?
10 megabyte
IRs
1960s
digital computers
27. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
data
frequency - contrast - and noise
200 - 500-1000
contrast
28. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
window
data
voxel
health level 7
29. If window width increases - image contrast will ____.
Fourier Transformation
CD or DVD
TV camera
decrease
30. Window width and contrast have an ____ relationship.
reduces
inverse
pixel size
peripherals
31. What are the two most common output devices?
high-pass filtering
accentuates or suppresses
monitors and printers
high
32. What does a 0 in binary code stand for?
array processors
contrast
off
window level
33. Which computers handle data composed of definite quantities of current?
32
health level 7
digital computers
slow scanning
34. What does DICOM stand for?
transverse - sagittal - and coronal
scanning or array detection
digital imaging and communication in medicine
expansion or compression
35. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
high
numerical values
byte
scanning
36. What does DICOM stand for?
digital imaging and communication in medicine
array processors
voltage
greater
37. What is an individual matrix box or picture element?
pixel
progressive scanning
little
frequency
38. What 3 things were required prior to digital computer applications in medical imaging?
increase
mathematical theory - solid-state electronics - and microchip technology
CPU - Bus
raster scan pattern
39. What is required for collection of input information?
bit
detector
central processing unit
noise
40. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
analog computers
numerical value
transverse - sagittal - and coronal
smoothing
41. A high contrast image has a ___ frequency.
high
bit
10 megabyte
DICOM standard
42. What is high-pass filtering also called?
peripherals
direct
edge enhancement filtering or sharpening
decreased
43. What does a 1 in binary code stand for?
digital computers
on
CPU - Bus
edge enhancement filtering or sharpening
44. What is the mathematical algorithm used to create all medical images?
CT and MRI
decrease
software
Fourier Transformation
45. 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?
Fourier Transformation
pixel size
health level 7
window level
46. If the window level increases - density will _____.
CPU - Bus
increase
shades of gray
1940s
47. Which memory can only be extracted without alteration; cannot change?
filtering
read memory
1940s
edge enhancement filtering or sharpening
48. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
RAM
smaller
numerical value
two
49. Computer equipment is called what?
smaller
two
hardware
parallel - serial
50. What changes the pixel value by multiplication or division and controls image contrast?
array processors
TV camera
window width
matrix