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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 required for collection of input information?
detector
numerical value
low
filtering
2. Which type of information consists of operating instructions?
bus speed
CD or DVD
write memory
program
3. There is a ___ relationship between subject contrast and acquired data contrast.
gray scale bit depth
array processors
direct
software
4. A high S/N indicates ___ noise in the image.
little
memory
off
DICOM standard
5. What is the information stored as magnetic variations referred to as?
window width
CPU - Bus
memory
progressive scanning
6. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
peripherals
read memory
fine
raster scan pattern
7. What is required for collection of input information?
detector
large amount
mathematical theory - solid-state electronics - and microchip technology
voltage
8. What is an image that has been converted into numerical values for transmission or processing?
software
digital image
central processing unit
signal-to-noise ratio
9. What are the two ways detectors acquire information?
scanning or array detection
computer - radiographer
32
digital imaging and communication in medicine
10. Which type of information consists of collected facts?
expansion or compression
bit
data
pixel size
11. Computer programs are called what?
frequency
health level 7
greater
software
12. A high contrast image has a ___ frequency.
CPU - Bus
digital computers
increase
high
13. 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?
32
DICOM standard
IR
two
14. What does DICOM stand for?
digital imaging and communication in medicine
smaller
inversely
computer - radiographer
15. Increased noise = _____ image contrast.
decreased
numerical value
gray scale bit depth
signal-to-noise ratio
16. Increased noise = _____ image contrast.
decreased
bit
pixel size
RAM
17. What type of scanning increases resolution slightly by scanning all 525 lines in order?
progressive scanning
inversely
1970s-1990s
array processors
18. The computer either ____ or ____ selected frequencies during the filtering process.
signal-to-noise ratio
1-2 lp/mm
smoothing
accentuates or suppresses
19. Who or What is responsible for density changes on a digital image? On a manual image
pixel
computer - radiographer
CD or DVD
low-pass filter
20. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
fine
RAM - ROM
ROM
1-2 lp/mm
21. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
voxel
mathematical theory - solid-state electronics - and microchip technology
progressive scanning
off
22. If window width increases - image contrast will ____.
decrease
TV camera
byte
two
23. Which computers handle data composed of continuously varying electrical currents?
analog computers
number of values displayed per image side
bandwidth
IR
24. The ____ is the heart of the computer while the ___ is the vessels.
slow scanning
shades of gray
RAM - ROM
CPU - Bus
25. 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?
software
health level 7
0 - 1
little
26. What was the earliest computer device called?
programs and data
abacus
bandwidth
window
27. A larger matrix provides ____ pixels.
0 - 1
smaller
raster scan pattern
CD or DVD
28. What is the name of the 'modern electronic computer'?
little
memory
ENIAC
10 megabyte
29. What is the raw data to which a Fourier Transformation is applied to create the digital image?
read memory
frequency
contrast
low
30. A __ _____ disk will store over 10000000 bytes of information.
software
bus
parallel - serial
10 megabyte
31. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
IRs
raster scan pattern
shades of gray
32. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
Input devices
direct
pixel
1970s-1990s
33. What is the random background information that does not contribute to the image quality?
noise
smoothing
peripherals
peripherals
34. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
low-pass - band-pass - and high-pass
abacus
Input devices
monitors and printers
35. 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?
smaller
health level 7
1945
bus
36. What is a square series of boxes that gives form to the image?
matrix
CD or DVD
computers
bit
37. Computer programs are called what?
CD or DVD
ENIAC
software
decreased
38. The human visual range is ___ or fewer shades of gray.
32
scanning
CD or DVD
edge enhancement filtering or sharpening
39. What does a 0 in binary code stand for?
large amount
Input devices
bus speed
off
40. Which type of information consists of collected facts?
data
1945
hardware
window
41. Which memory replaces new information with the old; can change?
gray scale bit depth
0 - 1
write memory
frequency
42. What determines resolution?
data
low-pass filter
monitors and printers
pixel size
43. Medical imaging is often achieved from information that has been processed by what?
digital computers
digital image
analog-to-digital converters
peripherals
44. Which computers handle data composed of definite quantities of current?
digital computers
reduces
window
IRs
45. A low contrast image has a ___ frequency.
magnetic tape
band-pass filtering
bus speed
low
46. 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?
digital image
band-pass filtering
software
numerical values
47. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
ENIAC
1960s
detector
48. What modalities are array processors useful for?
digital computers
CT and MRI
transverse - sagittal - and coronal
central processing unit
49. 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 speed
off
bus
central processing unit
50. Which type of filter amplifies or deletes all but the high frequencies - appears to increase contrast - and is useful in vascular imaging or digital mammo.
slow scanning
parallel - serial
32
high-pass filtering