SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
|
Email
Search
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. Computer equipment is called what?
mathematical theory - solid-state electronics - and microchip technology
window width
hardware
memory
2. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
numerical value
array processors
low
health level 7
3. What 3 things were required prior to digital computer applications in medical imaging?
health level 7
mathematical theory - solid-state electronics - and microchip technology
hardware
analog computers
4. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
software
direct
decreased
5. What are devices that process information?
software
CPU - Bus
computers
ROM
6. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
Fourier Transformation
1970s-1990s
computers
7. What changes the pixel value by addition or subtraction and controls image density?
window level
binary machine
window width
signal-to-noise ratio
8. The number of shades of gray is determined by what?
digital computers
shades of gray
numerical value
gray scale bit depth
9. 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.
peripherals
scanning or array detection
digital imaging and communication in medicine
0 - 1
10. What permit input/output of information to or from the CPU?
peripherals
1960s
signal-to-noise ratio
digital computers
11. What are the two types of information computers use?
programs and data
RAM - ROM
filtering
detector
12. What are devices such as keyboard - touch screen monitors - and voice-activation that you put into or connect to a computer?
200 - 500-1000
decrease
inversely
Input devices
13. What provides specific instructions for calculations and sequential steps to be followed?
200 - 500-1000
software
read memory
voxel
14. 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.
number of values displayed per image side
bus
numerical values
window
15. Which type of information consists of operating instructions?
parallel - serial
abacus
mathematical theory - solid-state electronics - and microchip technology
program
16. In what time period did microchip technology come out?
magnetic tape
1960s
edge enhancement filtering or sharpening
electronic sources
17. What are devices that process information?
computers
large amount
pixel
0 - 1
18. Noise is ____ related to contrast.
1945
computers
ENIAC
inversely
19. In what time period did mathematical theory and solid-state electronics come out?
1940s
byte
binary machine
scanning or array detection
20. What are the two types of information computers use?
transverse - sagittal - and coronal
0 - 1
programs and data
pixel
21. What is critical to how fast the computer system can function?
bus speed
signal-to-noise ratio
shades of gray
matrix
22. When detectors acquire their information by ____ they are receiving info from a specific area.
window
scanning
expansion or compression
bus
23. Computers operate from ____ ____ language.
bus speed
binary machine
program
RAM
24. Which type of information consists of operating instructions?
mathematical theory - solid-state electronics - and microchip technology
window
program
binary machine
25. What is the random background information that does not contribute to the image quality?
bus speed
expansion or compression
byte
noise
26. What is the 'noisiest' component of a digital system?
window width
TV camera
ROM
frequency - contrast - and noise
27. There is a ___ relationship between subject contrast and acquired data contrast.
array detection
1000+
direct
magnetic tape
28. A low contrast image has a ___ frequency.
Input devices
low
binary machine
parallel - serial
29. Each pixel is capable of representing a wide range of what?
memory
gray scale bit depth
shades of gray
IRs
30. Computer memory is often rated in terms of total ____ memory.
scanning or array detection
byte
progressive scanning
signal-to-noise ratio
31. When subject contrast is high - the acquired data contrast will be ____.
two
high
parallel - serial
central processing unit
32. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
scanning or array detection
central processing unit
hardware
33. 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?
hardware
pixel size
health level 7
transverse - sagittal - and coronal
34. What is the frequency response of the incoming signal called?
bandwidth
digital computers
hardware
computer - radiographer
35. What does DICOM stand for?
high
digital imaging and communication in medicine
Fourier Transformation
fine
36. 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?
fine
bus
digital imaging and communication in medicine
smoothing
37. What input device do radiographers use on a normal basis?
IRs
Input devices
10 megabyte
inverse
38. 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
low-pass filter
fine
direct
39. All medical imaging is achieved with which type of computers?
digital computers
decrease
number of values displayed per image side
transverse - sagittal - and coronal
40. 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?
monitors and printers
inversely
transverse - sagittal - and coronal
increase
41. What changes the pixel value by multiplication or division and controls image contrast?
decrease
gray scale bit depth
bit
window width
42. 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.
high-pass filtering
progressive scanning
smoothing
1000+
43. A __ _____ disk will store over 10000000 bytes of information.
window
central processing unit
10 megabyte
1-2 lp/mm
44. The human visual range is ___ or fewer shades of gray.
window width
digital imaging and communication in medicine
32
byte
45. Computer programs are called what?
software
fine
large amount
digital image
46. Which memory can only be extracted without alteration; cannot change?
read memory
window width
high-pass filtering
gray scale bit depth
47. Who or What is responsible for density changes on a digital image? On a manual image
slow scanning
computer - radiographer
CD or DVD
matrix size
48. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
high
noise
voxel
magnetic tape
49. What directs information to and from various parts of the computer?
frequency
central processing unit
two
low-pass - band-pass - and high-pass
50. Which type of information consists of collected facts?
voxel
data
monitors and printers
2^x