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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 the 'noisiest' component of a digital system?
increase
CT and MRI
TV camera
hardware
2. What is the information stored as magnetic variations referred to as?
smaller
analog computers
memory
TV camera
3. A high contrast image has a ___ frequency.
raster scan pattern
decreased
transverse - sagittal - and coronal
high
4. What modalities are array processors useful for?
32
CT and MRI
monitors and printers
two
5. If the window level increases - density will _____.
increase
off
gray scale bit depth
CT and MRI
6. What type of memory storage devices are required for large amounts of data?
bus
off
mathematical theory - solid-state electronics - and microchip technology
CD or DVD
7. In what time period did mathematical theory and solid-state electronics come out?
health level 7
CT and MRI
1940s
200 - 500-1000
8. Which computers handle data composed of definite quantities of current?
number of values displayed per image side
slow scanning
200 - 500-1000
digital computers
9. What provides specific instructions for calculations and sequential steps to be followed?
decrease
inversely
smoothing
software
10. A __ _____ disk will store over 10000000 bytes of information.
smaller
10 megabyte
DICOM standard
1960s
11. There is a ___ relationship between subject contrast and acquired data contrast.
transverse - sagittal - and coronal
1945
direct
inversely
12. Changes in window width are sometimes called gray scale ____ or ____.
expansion or compression
voxel
fine
contrast
13. What permit input/output of information to or from the CPU?
CPU - Bus
peripherals
voxel
200 - 500-1000
14. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
peripherals
magnetic tape
abacus
fine
15. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
transverse - sagittal - and coronal
array processors
matrix
voltage
16. When detectors acquire their information through ____ they are receiving all the info at once.
frequency - contrast - and noise
array detection
0 - 1
CPU - Bus
17. Increased noise = _____ image contrast.
decreased
abacus
software
CT and MRI
18. There is a ___ relationship between subject contrast and acquired data contrast.
monitors and printers
matrix size
direct
decreased
19. What does DICOM stand for?
digital imaging and communication in medicine
low
1940s
reduces
20. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
window level
electronic sources
0 - 1
fine
21. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
magnetic tape
bus speed
numerical value
direct
22. 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?
number of values displayed per image side
transverse - sagittal - and coronal
bus
byte
23. Commercial systems often have a S/N of ____ but the HR systems used in digital fluoro have a S/N between ________.
increase
200 - 500-1000
bus
1945
24. Each pixel is capable of representing a wide range of what?
shades of gray
array detection
fine
central processing unit
25. What is the name for a binary digit?
bit
numerical value
analog-to-digital converters
Fourier Transformation
26. Changes in window width are sometimes called gray scale ____ or ____.
inversely
expansion or compression
TV camera
scanning or array detection
27. What type of scanning increases resolution slightly by scanning all 525 lines in order?
bus speed
1960s
voltage
progressive scanning
28. In what time period did microchip technology come out?
1960s
window width
ROM
computer - radiographer
29. When subject contrast is high - the acquired data contrast will be ____.
data
high
low-pass filter
byte
30. The ____ is the heart of the computer while the ___ is the vessels.
CPU - Bus
1-2 lp/mm
digital image
hardware
31. What is the random background information that does not contribute to the image quality?
fine
increase
1-2 lp/mm
noise
32. When detectors acquire their information by ____ they are receiving info from a specific area.
on
IRs
bandwidth
scanning
33. Each pixel is capable of representing a wide range of what?
DICOM standard
byte
voltage
shades of gray
34. A high S/N indicates ___ noise in the image.
IRs
IR
high
little
35. What is the equation for determining gray scale bit depth?
low
2^x
hardware
RAM
36. What is critical to how fast the computer system can function?
bus speed
frequency - contrast - and noise
200 - 500-1000
scanning or array detection
37. What was the earliest computer device called?
digital computers
RAM - ROM
abacus
smoothing
38. Which type of information consists of operating instructions?
program
2^x
data
electronic sources
39. What is critical to how fast the computer system can function?
reduces
bus speed
monitors and printers
2^x
40. Digital detectors are capable of producing ______ shades of gray.
off
1000+
window level
scanning
41. What is the name for an 8-bit word?
byte
software
1970s-1990s
electronic sources
42. What type of scanning increases resolution slightly by scanning all 525 lines in order?
window level
high
1940s
progressive scanning
43. Electrical connections between the CPU and the other components rung along a system of series or parallel conductors called what?
bus
low-pass filter
RAM - ROM
filtering
44. When detectors acquire their information by ____ they are receiving info from a specific area.
numerical values
scanning
frequency - contrast - and noise
voxel
45. 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?
reduces
health level 7
hardware
monitors and printers
46. What is required for collection of input information?
decreased
read memory
detector
accentuates or suppresses
47. What is an individual matrix box or picture element?
pixel
200 - 500-1000
frequency - contrast - and noise
peripherals
48. What is an image that has been converted into numerical values for transmission or processing?
digital image
window width
direct
scanning or array detection
49. What does a 1 in binary code stand for?
matrix size
CPU - Bus
on
scanning
50. What 3 things were required prior to digital computer applications in medical imaging?
1-2 lp/mm
accentuates or suppresses
mathematical theory - solid-state electronics - and microchip technology
bus speed