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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. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
peripherals
program
bus
slow scanning
2. What does DICOM stand for?
central processing unit
digital imaging and communication in medicine
pixel size
direct
3. The number of shades of gray is determined by what?
window width
voxel
gray scale bit depth
on
4. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
IR
data
digital image
parallel - serial
5. Binary systems operate with a ___-symbol language.
two
on
CT and MRI
bandwidth
6. If window width increases - image contrast will ____.
decrease
analog computers
window width
shades of gray
7. Fluoroscopic noise mostly comes from what?
peripherals
electronic sources
2^x
scanning
8. What are the two types of information computers use?
RAM - ROM
Fourier Transformation
digital computers
programs and data
9. Computer memory is often rated in terms of total ____ memory.
byte
DICOM standard
memory
DICOM standard
10. Medical imaging is often achieved from information that has been processed by what?
high-pass filtering
on
hardware
analog-to-digital converters
11. Changes in window width are sometimes called gray scale ____ or ____.
noise
expansion or compression
number of values displayed per image side
ENIAC
12. The computer either ____ or ____ selected frequencies during the filtering process.
numerical value
accentuates or suppresses
bus speed
reduces
13. What is accomplished by transforming the image into frequencies and making mathematical alteration to reproduce the image?
RAM
filtering
voxel
central processing unit
14. What is the primary limitation with the resolution on digital images?
write memory
on
1960s
raster scan pattern
15. The quality of the data acquired from the IR is measured by what three data characteristics?
1-2 lp/mm
frequency - contrast - and noise
data
CD or DVD
16. Noise is ____ related to contrast.
IR
large amount
inversely
RAM - ROM
17. 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.
IRs
read memory
0 - 1
digital image
18. What is the raw data to which a Fourier Transformation is applied to create the digital image?
software
frequency
peripherals
increase
19. Increased noise = _____ image contrast.
decreased
direct
transverse - sagittal - and coronal
matrix
20. Digital detectors are capable of producing ______ shades of gray.
CD or DVD
1000+
two
on
21. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
200 - 500-1000
scanning or array detection
low-pass - band-pass - and high-pass
RAM - ROM
22. What is the primary limitation with the resolution on digital images?
programs and data
noise
central processing unit
raster scan pattern
23. What is the mathematical algorithm used to create all medical images?
matrix
health level 7
Fourier Transformation
matrix size
24. Computerized digital images are described in terms of what
32
number of values displayed per image side
data
CPU - Bus
25. 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?
noise
gray scale bit depth
array detection
transverse - sagittal - and coronal
26. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
filtering
window
data
magnetic tape
27. A __ _____ disk will store over 10000000 bytes of information.
contrast
digital imaging and communication in medicine
10 megabyte
ROM
28. A high S/N indicates ___ noise in the image.
contrast
programs and data
detector
little
29. What is the information stored as magnetic variations referred to as?
fine
memory
low
CPU - Bus
30. What is the 'noisiest' component of a digital system?
hardware
low-pass - band-pass - and high-pass
hardware
TV camera
31. What is the measure of the differences between the data values referred to as?
write memory
transverse - sagittal - and coronal
1940s
contrast
32. What is the equation for determining gray scale bit depth?
2^x
pixel size
high
on
33. What type of scanning increases resolution but can't be used in real-time dynamic studies?
IRs
ROM
slow scanning
DICOM standard
34. Computerized digital images are described in terms of what
1970s-1990s
number of values displayed per image side
voxel
gray scale bit depth
35. What is a square series of boxes that gives form to the image?
matrix
direct
electronic sources
memory
36. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
reduces
numerical value
high
computer - radiographer
37. Changes in window width are sometimes called gray scale ____ or ____.
central processing unit
window
expansion or compression
reduces
38. What was the earliest computer device called?
array processors
abacus
two
1940s
39. What is the equation for determining gray scale bit depth?
RAM - ROM
TV camera
frequency - contrast - and noise
2^x
40. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
digital computers
byte
bus
41. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
parallel - serial
numerical values
voxel
peripherals
42. When subject contrast is high - the acquired data contrast will be ____.
Fourier Transformation
high
noise
detector
43. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
smoothing
ENIAC
scanning or array detection
band-pass filtering
44. When detectors acquire their information through ____ they are receiving all the info at once.
200 - 500-1000
array detection
bus
raster scan pattern
45. Which type of information consists of collected facts?
data
low
CD or DVD
1960s
46. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
array processors
byte
central processing unit
1970s-1990s
47. Binary systems operate with a ___-symbol language.
byte
two
voxel
32
48. 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?
low
abacus
health level 7
low-pass - band-pass - and high-pass
49. A low contrast image has a ___ frequency.
electronic sources
low
contrast
bus speed
50. What is high-pass filtering also called?
magnetic tape
edge enhancement filtering or sharpening
inversely
digital computers