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. What is the name for an 8-bit word?
direct
pixel size
signal-to-noise ratio
byte
2. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
smaller
voxel
CT and MRI
DICOM standard
3. Resolution is controlled by what?
RAM
program
computers
matrix size
4. The _____ the matrix size - the better the resolution.
array processors
voxel
greater
ENIAC
5. What type of scanning increases resolution slightly by scanning all 525 lines in order?
low
transverse - sagittal - and coronal
digital computers
progressive scanning
6. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
computers
little
bus
7. What is the random background information that does not contribute to the image quality?
filtering
noise
central processing unit
smoothing
8. 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?
10 megabyte
inverse
DICOM standard
two
9. Fluoroscopic noise mostly comes from what?
frequency
central processing unit
off
electronic sources
10. Each pixel is capable of representing a wide range of what?
decrease
filtering
window width
shades of gray
11. A low contrast image has a ___ frequency.
central processing unit
low
10 megabyte
monitors and printers
12. What is high-pass filtering also called?
little
frequency - contrast - and noise
scanning or array detection
edge enhancement filtering or sharpening
13. What is the equation for determining gray scale bit depth?
RAM
computer - radiographer
voltage
2^x
14. What permit input/output of information to or from the CPU?
CPU - Bus
peripherals
IRs
gray scale bit depth
15. What is the raw data to which a Fourier Transformation is applied to create the digital image?
bus
greater
frequency
voltage
16. What does DICOM stand for?
digital imaging and communication in medicine
matrix size
greater
IR
17. What 3 things were required prior to digital computer applications in medical imaging?
transverse - sagittal - and coronal
shades of gray
mathematical theory - solid-state electronics - and microchip technology
1945
18. Computer equipment is called what?
memory
direct
hardware
IR
19. What can memory be transferred as?
inverse
32
voltage
central processing unit
20. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
bus
digital computers
low
21. What is the primary limitation with the resolution on digital images?
raster scan pattern
byte
digital computers
binary machine
22. What does a 1 in binary code stand for?
expansion or compression
bit
on
window level
23. Which type of information consists of collected facts?
data
peripherals
number of values displayed per image side
bus
24. When subject contrast is high - the acquired data contrast will be ____.
matrix
high
low-pass filter
analog computers
25. What modalities are array processors useful for?
write memory
high
CT and MRI
32
26. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
software
CPU - Bus
1970s-1990s
27. The number of shades of gray is determined by what?
programs and data
decreased
computer - radiographer
gray scale bit depth
28. What is the mathematical algorithm used to create all medical images?
band-pass filtering
peripherals
RAM - ROM
Fourier Transformation
29. A high S/N indicates ___ noise in the image.
little
on
pixel size
CD or DVD
30. 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.
10 megabyte
window
raster scan pattern
high-pass filtering
31. A high contrast image has a ___ frequency.
high
window width
CD or DVD
1945
32. What is the name for an 8-bit word?
numerical value
number of values displayed per image side
byte
digital image
33. The human visual range is ___ or fewer shades of gray.
32
high
pixel
software
34. The computer either ____ or ____ selected frequencies during the filtering process.
smoothing
1960s
peripherals
accentuates or suppresses
35. What is the 'noisiest' component of a digital system?
TV camera
scanning
software
analog-to-digital converters
36. If window width increases - image contrast will ____.
Input devices
progressive scanning
low
decrease
37. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
analog computers
bus speed
low-pass - band-pass - and high-pass
bus
38. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
parallel - serial
high
edge enhancement filtering or sharpening
TV camera
39. What does a 0 in binary code stand for?
voltage
program
number of values displayed per image side
off
40. What provides specific instructions for calculations and sequential steps to be followed?
software
band-pass filtering
read memory
pixel size
41. What permit input/output of information to or from the CPU?
0 - 1
pixel
peripherals
high
42. There is a ___ relationship between subject contrast and acquired data contrast.
direct
analog computers
central processing unit
reduces
43. Computerized digital images are described in terms of what
greater
number of values displayed per image side
abacus
parallel - serial
44. A larger matrix provides ____ pixels.
band-pass filtering
Fourier Transformation
0 - 1
smaller
45. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
low-pass - band-pass - and high-pass
1000+
byte
46. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
low-pass filter
accentuates or suppresses
analog-to-digital converters
pixel
47. Each pixel is capable of representing a wide range of what?
digital computers
bit
window
shades of gray
48. In what time period did mathematical theory and solid-state electronics come out?
array processors
memory
gray scale bit depth
1940s
49. What input device do radiographers use on a normal basis?
digital image
scanning
IRs
analog-to-digital converters
50. Which memory can only be extracted without alteration; cannot change?
read memory
greater
ROM
1000+