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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. What is the name for a binary digit?
parallel - serial
slow scanning
bit
inverse
2. What provides specific instructions for calculations and sequential steps to be followed?
raster scan pattern
on
low
software
3. What is required for collection of input information?
low-pass - band-pass - and high-pass
detector
program
mathematical theory - solid-state electronics - and microchip technology
4. The number of shades of gray is determined by what?
on
bus speed
direct
gray scale bit depth
5. Each pixel is capable of representing a wide range of what?
number of values displayed per image side
shades of gray
read memory
10 megabyte
6. The number of shades of gray is determined by what?
fine
direct
0 - 1
gray scale bit depth
7. Computer memory is often rated in terms of total ____ memory.
health level 7
byte
1000+
memory
8. What 3 things were required prior to digital computer applications in medical imaging?
two
digital computers
mathematical theory - solid-state electronics - and microchip technology
array detection
9. Medical imaging is often achieved from information that has been processed by what?
analog-to-digital converters
off
numerical value
smoothing
10. What directs information to and from various parts of the computer?
RAM
central processing unit
voxel
abacus
11. The _____ the matrix size - the better the resolution.
greater
bus
ENIAC
band-pass filtering
12. When was ENIAC invented?
1945
IR
band-pass filtering
monitors and printers
13. What type of scanning increases resolution slightly by scanning all 525 lines in order?
bus
peripherals
progressive scanning
200 - 500-1000
14. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
1940s
fine
inversely
magnetic tape
15. What is the mathematical algorithm used to create all medical images?
two
Fourier Transformation
transverse - sagittal - and coronal
computer - radiographer
16. Digital detectors are capable of producing ______ shades of gray.
1000+
monitors and printers
low-pass filter
CT and MRI
17. If window width increases - image contrast will ____.
decrease
hardware
RAM
low
18. What is the 'heart' of every computer?
central processing unit
1960s
bus
ENIAC
19. Fluoroscopic noise mostly comes from what?
electronic sources
memory
bus
1945
20. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
edge enhancement filtering or sharpening
on
inversely
200 - 500-1000
21. A high S/N indicates ___ noise in the image.
little
bus speed
shades of gray
memory
22. Computerized digital images are described in terms of what
number of values displayed per image side
accentuates or suppresses
numerical value
health level 7
23. What is the 'noisiest' component of a digital system?
increase
inversely
TV camera
electronic sources
24. What is the equation for determining gray scale bit depth?
low-pass filter
raster scan pattern
2^x
bus speed
25. What was the earliest computer device called?
DICOM standard
numerical values
abacus
band-pass filtering
26. 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
shades of gray
high-pass filtering
27. Medical imaging is often achieved from information that has been processed by what?
1945
analog-to-digital converters
matrix
number of values displayed per image side
28. 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?
read memory
parallel - serial
data
band-pass filtering
29. In what time period did mathematical theory and solid-state electronics come out?
pixel
abacus
1940s
bit
30. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
1940s
RAM
1000+
number of values displayed per image side
31. A low contrast image has a ___ frequency.
low
TV camera
high-pass filtering
raster scan pattern
32. 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?
number of values displayed per image side
abacus
bus speed
health level 7
33. A low contrast image has a ___ frequency.
on
central processing unit
signal-to-noise ratio
low
34. Each pixel is capable of representing a wide range of what?
shades of gray
1-2 lp/mm
expansion or compression
bus
35. What is the mathematical algorithm used to create all medical images?
program
filtering
ENIAC
Fourier Transformation
36. Window width and contrast have an ____ relationship.
inverse
reduces
pixel size
TV camera
37. Which memory can only be extracted without alteration; cannot change?
on
read memory
computers
RAM
38. What determines resolution?
health level 7
pixel size
write memory
CD or DVD
39. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
byte
read memory
fine
Fourier Transformation
40. What is an image that has been converted into numerical values for transmission or processing?
digital image
large amount
write memory
computer - radiographer
41. Binary systems operate with a ___-symbol language.
frequency - contrast - and noise
two
computers
low-pass filter
42. What is the random background information that does not contribute to the image quality?
low
noise
computers
data
43. What is required for collection of input information?
bit
gray scale bit depth
bandwidth
detector
44. What is the primary limitation with the resolution on digital images?
fine
inverse
raster scan pattern
signal-to-noise ratio
45. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
program
accentuates or suppresses
band-pass filtering
bus
46. If the window level increases - density will _____.
frequency
memory
increase
RAM
47. What can memory be transferred as?
peripherals
smoothing
TV camera
voltage
48. 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?
bus
decrease
frequency - contrast - and noise
inversely
49. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
inverse
mathematical theory - solid-state electronics - and microchip technology
shades of gray
50. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
fine
contrast
parallel - serial
RAM
Can you answer 50 questions in 15 minutes?
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