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 type of scanning increases resolution slightly by scanning all 525 lines in order?
decreased
program
greater
progressive scanning
2. What does a 0 in binary code stand for?
bandwidth
off
programs and data
1940s
3. What provides specific instructions for calculations and sequential steps to be followed?
decrease
software
high
frequency - contrast - and noise
4. Computers operate from ____ ____ language.
binary machine
10 megabyte
bit
shades of gray
5. 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.
write memory
window
electronic sources
off
6. The human visual range is ___ or fewer shades of gray.
electronic sources
32
contrast
signal-to-noise ratio
7. What is the name for a binary digit?
matrix
number of values displayed per image side
decrease
bit
8. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
health level 7
number of values displayed per image side
DICOM standard
9. Changes in window width are sometimes called gray scale ____ or ____.
high
expansion or compression
decreased
ROM
10. What directs information to and from various parts of the computer?
high-pass filtering
2^x
voltage
central processing unit
11. What is the random background information that does not contribute to the image quality?
bus
noise
ROM
high-pass filtering
12. What is an individual matrix box or picture element?
byte
decrease
pixel
low
13. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
central processing unit
window width
frequency - contrast - and noise
14. Noise is measured as what?
shades of gray
little
bus speed
signal-to-noise ratio
15. Increased noise = _____ image contrast.
inversely
decreased
filtering
window width
16. What is the information stored as magnetic variations referred to as?
bus
central processing unit
little
memory
17. Which type of information consists of operating instructions?
contrast
program
detector
monitors and printers
18. When detectors acquire their information by ____ they are receiving info from a specific area.
direct
TV camera
read memory
scanning
19. Which memory can only be extracted without alteration; cannot change?
edge enhancement filtering or sharpening
window level
bandwidth
read memory
20. If the window level increases - density will _____.
increase
direct
bandwidth
digital computers
21. The computer either ____ or ____ selected frequencies during the filtering process.
accentuates or suppresses
digital imaging and communication in medicine
1970s-1990s
parallel - serial
22. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
RAM
bus
32
software
23. What are the two ways detectors acquire information?
write memory
decrease
central processing unit
scanning or array detection
24. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
peripherals
magnetic tape
peripherals
bus speed
25. When detectors acquire their information through ____ they are receiving all the info at once.
data
band-pass filtering
array detection
array processors
26. The number of shades of gray is determined by what?
RAM - ROM
gray scale bit depth
direct
monitors and printers
27. 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
ROM
program
1960s
28. What determines resolution?
peripherals
number of values displayed per image side
mathematical theory - solid-state electronics - and microchip technology
pixel size
29. What type of scanning increases resolution but can't be used in real-time dynamic studies?
analog computers
direct
Fourier Transformation
slow scanning
30. A high S/N indicates ___ noise in the image.
abacus
byte
1970s-1990s
little
31. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
bus
RAM - ROM
byte
0 - 1
32. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
binary machine
byte
digital computers
200 - 500-1000
33. Resolution is controlled by what?
matrix size
bus
CT and MRI
monitors and printers
34. 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?
ROM
health level 7
slow scanning
monitors and printers
35. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
1940s
abacus
voxel
low
36. Computers operate from ____ ____ language.
1945
window level
1940s
binary machine
37. Which memory can only be extracted without alteration; cannot change?
read memory
raster scan pattern
32
DICOM standard
38. Noise is ____ related to contrast.
pixel
low
bus speed
inversely
39. The ____ is the heart of the computer while the ___ is the vessels.
slow scanning
software
accentuates or suppresses
CPU - Bus
40. What are devices that process information?
computers
on
filtering
high
41. Which computers handle data composed of continuously varying electrical currents?
bus
analog computers
pixel
decrease
42. What is a square series of boxes that gives form to the image?
matrix
central processing unit
array processors
CT and MRI
43. Fluoroscopic noise mostly comes from what?
high
on
number of values displayed per image side
electronic sources
44. What is the raw data to which a Fourier Transformation is applied to create the digital image?
smoothing
frequency
memory
TV camera
45. 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.
high-pass filtering
edge enhancement filtering or sharpening
filtering
0 - 1
46. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
binary machine
1-2 lp/mm
central processing unit
CD or DVD
47. What permit input/output of information to or from the CPU?
bus speed
high-pass filtering
peripherals
computer - radiographer
48. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
pixel
RAM
peripherals
binary machine
49. What is the frequency response of the incoming signal called?
signal-to-noise ratio
bandwidth
1945
bit
50. What is an image that has been converted into numerical values for transmission or processing?
low
array detection
computers
digital image