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. ____ circuits permit simultaneous transmission of information while ____ circuits transmit sequentially.
numerical values
greater
parallel - serial
IRs
2. Noise is ____ related to contrast.
inversely
computer - radiographer
programs and data
numerical values
3. What is the frequency response of the incoming signal called?
edge enhancement filtering or sharpening
bandwidth
programs and data
hardware
4. What type of memory storage devices are required for large amounts of data?
decreased
CD or DVD
accentuates or suppresses
low-pass filter
5. Computer memory is often rated in terms of total ____ memory.
byte
little
1000+
monitors and printers
6. What is an individual matrix box or picture element?
32
pixel
high
filtering
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.
bus
frequency
ENIAC
window
8. 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?
1960s
data
matrix size
bus
9. Noise is measured as what?
bandwidth
frequency - contrast - and noise
numerical values
signal-to-noise ratio
10. Noise is measured as what?
high
monitors and printers
signal-to-noise ratio
high
11. Medical imaging is often achieved from information that has been processed by what?
array detection
analog-to-digital converters
programs and data
scanning
12. What can memory be transferred as?
byte
voltage
window level
signal-to-noise ratio
13. If the window level increases - density will _____.
CT and MRI
increase
digital imaging and communication in medicine
window width
14. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
low-pass filter
RAM
signal-to-noise ratio
numerical value
15. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
1-2 lp/mm
large amount
gray scale bit depth
low
16. When was ENIAC invented?
1945
gray scale bit depth
progressive scanning
little
17. What type of scanning increases resolution but can't be used in real-time dynamic studies?
slow scanning
bus
magnetic tape
decreased
18. A larger matrix provides ____ pixels.
DICOM standard
abacus
smaller
frequency - contrast - and noise
19. What is the measure of the differences between the data values referred to as?
1960s
contrast
read memory
0 - 1
20. What is the random background information that does not contribute to the image quality?
monitors and printers
gray scale bit depth
matrix
noise
21. The computer either ____ or ____ selected frequencies during the filtering process.
frequency
scanning or array detection
accentuates or suppresses
IRs
22. What is the name for an 8-bit word?
direct
computers
byte
bandwidth
23. A high contrast image has a ___ frequency.
detector
smoothing
high
bus
24. What determines resolution?
number of values displayed per image side
progressive scanning
pixel size
CD or DVD
25. What is an image that has been converted into numerical values for transmission or processing?
digital image
window level
raster scan pattern
CT and MRI
26. Modalities differ in bit depth that is available depending on the capabilities of what?
IR
raster scan pattern
high
memory
27. What are the two types of information computers use?
matrix size
programs and data
central processing unit
peripherals
28. Computer programs are called what?
pixel size
off
Input devices
software
29. What is the equation for determining gray scale bit depth?
2^x
window level
10 megabyte
CPU - Bus
30. If the window level increases - density will _____.
1945
IRs
200 - 500-1000
increase
31. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
data
voltage
high-pass filtering
numerical values
32. Increased noise = _____ image contrast.
CPU - Bus
decreased
greater
read memory
33. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
matrix size
frequency - contrast - and noise
expansion or compression
ROM
34. What determines resolution?
pixel size
high
write memory
CT and MRI
35. 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.
1940s
0 - 1
ROM
transverse - sagittal - and coronal
36. What is the 'heart' of every computer?
matrix
Fourier Transformation
central processing unit
read memory
37. In what time period did mathematical theory and solid-state electronics come out?
1940s
frequency - contrast - and noise
bus speed
digital image
38. The human visual range is ___ or fewer shades of gray.
32
byte
read memory
filtering
39. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
two
numerical values
digital computers
RAM
40. The number of shades of gray is determined by what?
read memory
CPU - Bus
gray scale bit depth
ENIAC
41. A high S/N indicates ___ noise in the image.
voltage
electronic sources
little
expansion or compression
42. Which type of filter amplifies or deletes all but low frequencies - appears to reduce contrast - and is often used to remove high frequency nose.
CT and MRI
low-pass filter
health level 7
shades of gray
43. 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.
number of values displayed per image side
low
high-pass filtering
detector
44. In what time period did microchip technology come out?
analog-to-digital converters
1960s
analog computers
low
45. The computer either ____ or ____ selected frequencies during the filtering process.
signal-to-noise ratio
accentuates or suppresses
scanning
shades of gray
46. Computers operate from ____ ____ language.
software
filtering
bandwidth
binary machine
47. What modalities are array processors useful for?
window level
write memory
CT and MRI
write memory
48. 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?
byte
memory
window width
health level 7
49. What are devices that process information?
numerical value
IRs
computers
1970s-1990s
50. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
direct
fine
ROM
number of values displayed per image side