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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. Around what time did digital computerization come out for CT and US?
1970s-1990s
low
frequency
expansion or compression
2. What is the measure of the differences between the data values referred to as?
high-pass filtering
contrast
window level
programs and data
3. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
mathematical theory - solid-state electronics - and microchip technology
numerical value
2^x
write memory
4. What is the measure of the differences between the data values referred to as?
abacus
contrast
little
computer - radiographer
5. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
slow scanning
peripherals
parallel - serial
noise
6. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
contrast
scanning
Input devices
7. What 3 things were required prior to digital computer applications in medical imaging?
programs and data
filtering
mathematical theory - solid-state electronics - and microchip technology
on
8. What is the primary limitation with the resolution on digital images?
bit
scanning
raster scan pattern
peripherals
9. Which computers handle data composed of definite quantities of current?
greater
filtering
fine
digital computers
10. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
1960s
array processors
reduces
off
11. Computer programs are called what?
software
bus speed
memory
off
12. What changes the pixel value by addition or subtraction and controls image density?
programs and data
window level
bit
Input devices
13. What are the two types of information computers use?
digital imaging and communication in medicine
programs and data
little
number of values displayed per image side
14. Which memory replaces new information with the old; can change?
magnetic tape
gray scale bit depth
edge enhancement filtering or sharpening
write memory
15. What is the mathematical algorithm used to create all medical images?
high
IR
Fourier Transformation
frequency - contrast - and noise
16. What is the name for a binary digit?
noise
high
bit
smoothing
17. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
IRs
bus
inverse
2^x
18. What is the 'noisiest' component of a digital system?
raster scan pattern
high
TV camera
software
19. A high contrast image has a ___ frequency.
high
1-2 lp/mm
program
ROM
20. What type of scanning increases resolution but can't be used in real-time dynamic studies?
voxel
array processors
slow scanning
low
21. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
central processing unit
shades of gray
bus
numerical value
22. 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?
DICOM standard
ENIAC
software
200 - 500-1000
23. Computer memory is often rated in terms of total ____ memory.
byte
window level
high-pass filtering
abacus
24. Computers operate from ____ ____ language.
analog computers
array detection
binary machine
peripherals
25. What input device do radiographers use on a normal basis?
digital computers
off
window width
IRs
26. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
inversely
memory
monitors and printers
large amount
27. The computer either ____ or ____ selected frequencies during the filtering process.
low-pass filter
accentuates or suppresses
voxel
edge enhancement filtering or sharpening
28. What provides specific instructions for calculations and sequential steps to be followed?
inversely
software
peripherals
contrast
29. A low contrast image has a ___ frequency.
low
200 - 500-1000
read memory
analog computers
30. What is the frequency response of the incoming signal called?
contrast
bit
computers
bandwidth
31. Fluoroscopic noise mostly comes from what?
analog-to-digital converters
edge enhancement filtering or sharpening
software
electronic sources
32. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
direct
central processing unit
1-2 lp/mm
0 - 1
33. What is an individual matrix box or picture element?
window level
pixel
high-pass filtering
matrix size
34. When subject contrast is high - the acquired data contrast will be ____.
200 - 500-1000
inversely
abacus
high
35. What is critical to how fast the computer system can function?
decreased
bus speed
CPU - Bus
RAM - ROM
36. Which computers handle data composed of continuously varying electrical currents?
analog computers
bus
decrease
numerical value
37. What modalities are array processors useful for?
RAM - ROM
Fourier Transformation
bit
CT and MRI
38. Modalities differ in bit depth that is available depending on the capabilities of what?
bit
IR
IRs
scanning
39. What permit input/output of information to or from the CPU?
byte
direct
peripherals
analog computers
40. What are devices that process information?
bus
low-pass - band-pass - and high-pass
computers
transverse - sagittal - and coronal
41. What is a square series of boxes that gives form to the image?
smoothing
voltage
low-pass filter
matrix
42. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
low
peripherals
decreased
ROM
43. What is the frequency response of the incoming signal called?
band-pass filtering
bandwidth
peripherals
pixel
44. Increased noise = _____ image contrast.
2^x
DICOM standard
decreased
programs and data
45. What can memory be transferred as?
voltage
off
parallel - serial
monitors and printers
46. Which type of information consists of operating instructions?
Fourier Transformation
peripherals
high
program
47. What are the 3 classifications of digitized image filters?
mathematical theory - solid-state electronics - and microchip technology
low
low-pass - band-pass - and high-pass
pixel
48. When was ENIAC invented?
1940s
on
window
1945
49. Which type of information consists of operating instructions?
CD or DVD
1940s
program
digital computers
50. A larger matrix provides ____ pixels.
smaller
data
abacus
RAM