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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. The _____ the matrix size - the better the resolution.
increase
window width
greater
peripherals
2. If the window level increases - density will _____.
band-pass filtering
increase
IR
1945
3. What type of scanning increases resolution slightly by scanning all 525 lines in order?
read memory
progressive scanning
smaller
direct
4. What is an image that has been converted into numerical values for transmission or processing?
byte
digital image
expansion or compression
byte
5. Fluoroscopic noise mostly comes from what?
abacus
electronic sources
smaller
filtering
6. What provides specific instructions for calculations and sequential steps to be followed?
accentuates or suppresses
parallel - serial
200 - 500-1000
software
7. What is the name of the 'modern electronic computer'?
peripherals
electronic sources
2^x
ENIAC
8. What is the mathematical algorithm used to create all medical images?
Fourier Transformation
data
IRs
analog computers
9. What determines resolution?
CT and MRI
pixel size
numerical value
window
10. Resolution is controlled by what?
matrix size
gray scale bit depth
central processing unit
peripherals
11. Digitalization of analog information (increases / reduces) the quality and quantity of information?
progressive scanning
DICOM standard
reduces
electronic sources
12. When detectors acquire their information through ____ they are receiving all the info at once.
monitors and printers
CPU - Bus
inverse
array detection
13. The computer either ____ or ____ selected frequencies during the filtering process.
pixel size
gray scale bit depth
computer - radiographer
accentuates or suppresses
14. What 3 things were required prior to digital computer applications in medical imaging?
voltage
mathematical theory - solid-state electronics - and microchip technology
frequency - contrast - and noise
32
15. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
digital computers
bus
noise
IR
16. What is high-pass filtering also called?
detector
edge enhancement filtering or sharpening
byte
greater
17. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
pixel
fine
analog-to-digital converters
on
18. Which memory can only be extracted without alteration; cannot change?
200 - 500-1000
read memory
byte
binary machine
19. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
scanning
bit
magnetic tape
scanning or array detection
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?
health level 7
IRs
smoothing
window
21. What is the mathematical algorithm used to create all medical images?
1970s-1990s
write memory
reduces
Fourier Transformation
22. What does a 0 in binary code stand for?
off
noise
digital imaging and communication in medicine
frequency - contrast - and noise
23. What is the 'heart' of every computer?
write memory
signal-to-noise ratio
central processing unit
matrix
24. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
transverse - sagittal - and coronal
byte
numerical value
25. What is required for collection of input information?
bus
detector
bit
low-pass - band-pass - and high-pass
26. A low contrast image has a ___ frequency.
smaller
low
array processors
RAM - ROM
27. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
ROM
1-2 lp/mm
bus speed
low-pass - band-pass - and high-pass
28. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
large amount
ROM
hardware
decreased
29. What is critical to how fast the computer system can function?
two
bus speed
byte
high
30. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
two
parallel - serial
CD or DVD
1940s
31. In what time period did mathematical theory and solid-state electronics come out?
10 megabyte
0 - 1
1940s
byte
32. Noise is measured as what?
hardware
IR
CT and MRI
signal-to-noise ratio
33. The human visual range is ___ or fewer shades of gray.
byte
32
band-pass filtering
ENIAC
34. What is the random background information that does not contribute to the image quality?
noise
high-pass filtering
low
frequency - contrast - and noise
35. What is the name for a binary digit?
contrast
DICOM standard
transverse - sagittal - and coronal
bit
36. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
ENIAC
analog-to-digital converters
program
smoothing
37. What is the primary limitation with the resolution on digital images?
digital image
Input devices
pixel
raster scan pattern
38. In what time period did mathematical theory and solid-state electronics come out?
gray scale bit depth
DICOM standard
scanning or array detection
1940s
39. 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?
off
DICOM standard
1940s
32
40. What can memory be transferred as?
analog-to-digital converters
scanning
voltage
numerical values
41. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
frequency
analog-to-digital converters
analog-to-digital converters
42. What directs information to and from various parts of the computer?
health level 7
large amount
central processing unit
detector
43. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
low-pass - band-pass - and high-pass
direct
magnetic tape
44. What is a square series of boxes that gives form to the image?
computers
DICOM standard
matrix
ENIAC
45. What are devices that process information?
electronic sources
computers
programs and data
abacus
46. 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.
0 - 1
Fourier Transformation
DICOM standard
decreased
47. When detectors acquire their information by ____ they are receiving info from a specific area.
window
electronic sources
analog-to-digital converters
scanning
48. The ____ is the heart of the computer while the ___ is the vessels.
edge enhancement filtering or sharpening
CPU - Bus
read memory
low-pass - band-pass - and high-pass
49. What determines resolution?
pixel size
high-pass filtering
transverse - sagittal - and coronal
on
50. 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.
RAM
0 - 1
32
program