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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. Which computers handle data composed of continuously varying electrical currents?
analog computers
CT and MRI
digital computers
mathematical theory - solid-state electronics - and microchip technology
2. When was ENIAC invented?
low
1-2 lp/mm
1945
filtering
3. What is critical to how fast the computer system can function?
bus speed
low-pass filter
pixel
ENIAC
4. The ____ is the heart of the computer while the ___ is the vessels.
analog computers
1945
CPU - Bus
DICOM standard
5. Commercial units scan only 262.5 lines out of 525 in each pass thus producing ____ for diagnostic imaging.
transverse - sagittal - and coronal
1-2 lp/mm
central processing unit
electronic sources
6. If window width increases - image contrast will ____.
gray scale bit depth
decrease
TV camera
RAM - ROM
7. What is the raw data to which a Fourier Transformation is applied to create the digital image?
software
1000+
window level
frequency
8. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
large amount
edge enhancement filtering or sharpening
0 - 1
analog-to-digital converters
9. What directs information to and from various parts of the computer?
central processing unit
DICOM standard
off
monitors and printers
10. In medical imaging - each pixel value corresponds to a 3-D volume of tissue known as what?
greater
data
voxel
software
11. The number of shades of gray is determined by what?
greater
gray scale bit depth
progressive scanning
matrix
12. What directs information to and from various parts of the computer?
computers
read memory
central processing unit
array detection
13. Scanners - mouse - keyboard - input memory disk drive - and paper printers are all forms of what?
peripherals
noise
bandwidth
decreased
14. What input device do radiographers use on a normal basis?
IRs
1960s
central processing unit
1-2 lp/mm
15. If the window level increases - density will _____.
central processing unit
DICOM standard
increase
binary machine
16. Fluoroscopic noise mostly comes from what?
array detection
bus
peripherals
electronic sources
17. What are the two types of information computers use?
CPU - Bus
numerical value
programs and data
byte
18. What is the 'random-access' memory that usually functions as temporary storage for programming and operating instructions during use and is constantly changed/?
RAM
window width
low
increase
19. 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?
scanning or array detection
high
health level 7
Input devices
20. In what time period did microchip technology come out?
direct
numerical values
1960s
window
21. All medical imaging is achieved with which type of computers?
IRs
parallel - serial
CT and MRI
digital computers
22. What is the measure of the differences between the data values referred to as?
inversely
1945
byte
contrast
23. 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?
health level 7
DICOM standard
health level 7
reduces
24. What is the information stored as magnetic variations referred to as?
memory
bus
direct
ENIAC
25. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
DICOM standard
signal-to-noise ratio
numerical value
peripherals
26. When subject contrast is high - the acquired data contrast will be ____.
high
analog-to-digital converters
Fourier Transformation
magnetic tape
27. Digital detectors are capable of producing ______ shades of gray.
program
digital image
Fourier Transformation
1000+
28. The quality of the data acquired from the IR is measured by what three data characteristics?
frequency - contrast - and noise
frequency
number of values displayed per image side
pixel
29. What is a square series of boxes that gives form to the image?
array processors
CPU - Bus
health level 7
matrix
30. Noise is ____ related to contrast.
fine
32
inversely
pixel size
31. A __ _____ disk will store over 10000000 bytes of information.
matrix size
window width
inverse
10 megabyte
32. Which memory replaces new information with the old; can change?
noise
write memory
window width
analog computers
33. When detectors acquire their information by ____ they are receiving info from a specific area.
scanning
array processors
TV camera
10 megabyte
34. Which type of information consists of operating instructions?
1945
program
filtering
gray scale bit depth
35. What is the name for an 8-bit word?
mathematical theory - solid-state electronics - and microchip technology
byte
Fourier Transformation
detector
36. Window width and contrast have an ____ relationship.
inverse
matrix size
CD or DVD
direct
37. What are devices that process information?
CT and MRI
2^x
computers
little
38. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
magnetic tape
computers
increase
0 - 1
39. What changes the pixel value by multiplication or division and controls image contrast?
CPU - Bus
200 - 500-1000
IR
window width
40. What is the name for a binary digit?
digital imaging and communication in medicine
byte
bus speed
bit
41. Who or What is responsible for density changes on a digital image? On a manual image
CT and MRI
byte
computer - radiographer
raster scan pattern
42. What is the 'noisiest' component of a digital system?
digital computers
data
CPU - Bus
TV camera
43. What is an individual matrix box or picture element?
pixel
raster scan pattern
high-pass filtering
byte
44. Noise is measured as what?
0 - 1
signal-to-noise ratio
two
pixel
45. What type of scanning increases resolution but can't be used in real-time dynamic studies?
bus speed
slow scanning
1970s-1990s
electronic sources
46. What provides specific instructions for calculations and sequential steps to be followed?
software
number of values displayed per image side
computer - radiographer
voltage
47. Medical imaging is often achieved from information that has been processed by what?
scanning
array detection
matrix
analog-to-digital converters
48. Around what time did digital computerization come out for CT and US?
memory
1970s-1990s
RAM
ROM
49. Which computers handle data composed of definite quantities of current?
decreased
peripherals
edge enhancement filtering or sharpening
digital computers
50. Each pixel is capable of representing a wide range of what?
digital image
low-pass filter
pixel size
shades of gray