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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. 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
progressive scanning
abacus
scanning or array detection
2. What does a 0 in binary code stand for?
off
accentuates or suppresses
parallel - serial
numerical value
3. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
digital image
low-pass - band-pass - and high-pass
bus
1970s-1990s
4. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
contrast
array processors
high
memory
5. What permit input/output of information to or from the CPU?
CPU - Bus
peripherals
TV camera
frequency - contrast - and noise
6. 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?
pixel
transverse - sagittal - and coronal
numerical value
array detection
7. Because the range of stored densities is so much wider than the visual range - any digital image is only a small part of the total data obtained - each image is a _____ on the total range of data.
ROM
1-2 lp/mm
window
direct
8. Computer programs are called what?
bus
digital imaging and communication in medicine
software
smaller
9. What is the frequency response of the incoming signal called?
frequency - contrast - and noise
smaller
bandwidth
health level 7
10. What are the two ways detectors acquire information?
low
voltage
digital computers
scanning or array detection
11. What is high-pass filtering also called?
software
bus
edge enhancement filtering or sharpening
1970s-1990s
12. Around what time did digital computerization come out for CT and US?
program
1970s-1990s
direct
analog-to-digital converters
13. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
two
frequency - contrast - and noise
array processors
14. A high S/N indicates ___ noise in the image.
computer - radiographer
bus
contrast
little
15. Binary systems operate with a ___-symbol language.
32
200 - 500-1000
two
RAM - ROM
16. A larger matrix provides ____ pixels.
health level 7
increase
parallel - serial
smaller
17. What is the random background information that does not contribute to the image quality?
CT and MRI
noise
write memory
read memory
18. What permit input/output of information to or from the CPU?
window
Input devices
peripherals
mathematical theory - solid-state electronics - and microchip technology
19. What type of memory storage devices are required for large amounts of data?
CD or DVD
slow scanning
transverse - sagittal - and coronal
noise
20. What is the name of the 'modern electronic computer'?
progressive scanning
RAM - ROM
digital computers
ENIAC
21. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
fine
byte
low-pass filter
1960s
22. What does a 1 in binary code stand for?
Input devices
1970s-1990s
on
CT and MRI
23. Fluoroscopic noise mostly comes from what?
electronic sources
inversely
DICOM standard
pixel
24. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
RAM - ROM
1-2 lp/mm
low-pass filter
program
25. Which memory replaces new information with the old; can change?
smoothing
edge enhancement filtering or sharpening
write memory
little
26. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
1945
RAM
IR
transverse - sagittal - and coronal
27. Computerized digital images are described in terms of what
gray scale bit depth
greater
gray scale bit depth
number of values displayed per image side
28. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
TV camera
low-pass filter
low
29. Which computers handle data composed of definite quantities of current?
voltage
fine
Fourier Transformation
digital computers
30. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
central processing unit
gray scale bit depth
bus
gray scale bit depth
31. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
edge enhancement filtering or sharpening
RAM
number of values displayed per image side
1970s-1990s
32. What directs information to and from various parts of the computer?
programs and data
central processing unit
reduces
binary machine
33. What is the name for a binary digit?
bit
high-pass filtering
contrast
IRs
34. All medical imaging is achieved with which type of computers?
Fourier Transformation
array processors
digital imaging and communication in medicine
digital computers
35. 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
parallel - serial
software
1-2 lp/mm
36. What are the two types of information computers use?
low-pass filter
programs and data
pixel
noise
37. Noise is measured as what?
signal-to-noise ratio
increase
32
bus
38. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
data
ROM
window width
2^x
39. What is a square series of boxes that gives form to the image?
RAM - ROM
matrix
monitors and printers
accentuates or suppresses
40. What is required for collection of input information?
window
detector
1940s
write memory
41. There is a ___ relationship between subject contrast and acquired data contrast.
software
direct
low-pass - band-pass - and high-pass
parallel - serial
42. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
window width
smaller
32
43. Modalities differ in bit depth that is available depending on the capabilities of what?
filtering
IR
on
array processors
44. What determines resolution?
window width
little
CD or DVD
pixel size
45. What is the equation for determining gray scale bit depth?
transverse - sagittal - and coronal
DICOM standard
off
2^x
46. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
ENIAC
high
large amount
contrast
47. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
RAM - ROM
decrease
smaller
computers
48. Computers operate from ____ ____ language.
detector
electronic sources
smoothing
binary machine
49. What provides specific instructions for calculations and sequential steps to be followed?
accentuates or suppresses
transverse - sagittal - and coronal
software
TV camera
50. Around what time did digital computerization come out for CT and US?
1970s-1990s
decreased
bandwidth
central processing unit