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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. Window width and contrast have an ____ relationship.
IR
inverse
direct
ENIAC
2. Modalities differ in bit depth that is available depending on the capabilities of what?
on
expansion or compression
IR
scanning
3. Computer memory is often rated in terms of total ____ memory.
binary machine
on
gray scale bit depth
byte
4. What is critical to how fast the computer system can function?
bus speed
numerical value
peripherals
bit
5. What is an image that has been converted into numerical values for transmission or processing?
digital image
abacus
smaller
1960s
6. What type of memory storage devices are required for large amounts of data?
CD or DVD
inverse
noise
voltage
7. What is a specialized computer that functions as a peripheral and uses CPU memory to perform mathematical operations at extremely high speed?
byte
RAM
peripherals
array processors
8. What does DICOM stand for?
digital imaging and communication in medicine
abacus
CT and MRI
signal-to-noise ratio
9. Each box of an image matrix will display a ____ ____ which can be transformed into a visual brightness or density level.
memory
numerical value
CPU - Bus
magnetic tape
10. Digitalization of analog information (increases / reduces) the quality and quantity of information?
reduces
frequency
progressive scanning
digital computers
11. What is the measure of the differences between the data values referred to as?
large amount
digital imaging and communication in medicine
low-pass filter
contrast
12. A high S/N indicates ___ noise in the image.
analog-to-digital converters
contrast
two
little
13. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
2^x
mathematical theory - solid-state electronics - and microchip technology
large amount
voltage
14. Extremely narrow window width requires the computer to ignore a ___ ____ of data outside the chosen range.
IRs
central processing unit
large amount
high
15. Resolution is controlled by what?
RAM - ROM
matrix size
matrix
peripherals
16. Computerized digital images are described in terms of what
number of values displayed per image side
write memory
1970s-1990s
RAM
17. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
digital image
fine
electronic sources
1945
18. Fluoroscopic noise mostly comes from what?
bandwidth
pixel size
electronic sources
IR
19. What input device do radiographers use on a normal basis?
slow scanning
fine
IRs
scanning or array detection
20. What are the two ways detectors acquire information?
IRs
edge enhancement filtering or sharpening
CPU - Bus
scanning or array detection
21. What are the 3 classifications of digitized image filters?
bus
software
RAM - ROM
low-pass - band-pass - and high-pass
22. What are the two ways detectors acquire information?
computer - radiographer
computers
scanning or array detection
shades of gray
23. When detectors acquire their information through ____ they are receiving all the info at once.
array detection
large amount
signal-to-noise ratio
two
24. Computer programs are called what?
reduces
software
band-pass filtering
low
25. What is the primary limitation with the resolution on digital images?
raster scan pattern
1970s-1990s
analog-to-digital converters
IRs
26. Which computers handle data composed of continuously varying electrical currents?
large amount
byte
IRs
analog computers
27. What is the 'read-only' memory that contains basic operating instructions that are almost never changing?
0 - 1
ROM
slow scanning
shades of gray
28. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
band-pass filtering
magnetic tape
RAM - ROM
numerical values
29. When was ENIAC invented?
2^x
1945
read memory
matrix size
30. What provides specific instructions for calculations and sequential steps to be followed?
matrix size
RAM
low
software
31. 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?
noise
bus
computer - radiographer
off
32. Density and contrast of the digital image are controlled by varying the ____ ____ of each pixel.
numerical values
numerical value
on
IR
33. Extremely wide window width requires the computer to ignore ___ contrast differences in order to display the entire range of data.
ENIAC
IR
fine
decrease
34. The quality of the data acquired from the IR is measured by what three data characteristics?
little
increase
scanning or array detection
frequency - contrast - and noise
35. When power is turned off - (ROM / RAM) is erased and (ROM / RAM) is maintained
1-2 lp/mm
RAM - ROM
reduces
high-pass filtering
36. The number of shades of gray is determined by what?
binary machine
direct
1945
gray scale bit depth
37. What determines resolution?
pixel
edge enhancement filtering or sharpening
byte
pixel size
38. What are the two types of information computers use?
programs and data
high
accentuates or suppresses
2^x
39. What determines resolution?
pixel size
IRs
low-pass - band-pass - and high-pass
off
40. What type of memory storage devices are required for large amounts of data?
computers
CD or DVD
digital computers
array detection
41. What can memory be transferred as?
peripherals
frequency
analog-to-digital converters
voltage
42. Which computers handle data composed of definite quantities of current?
digital computers
1960s
monitors and printers
IR
43. All medical imaging is achieved with which type of computers?
raster scan pattern
scanning or array detection
digital computers
ROM
44. Which computers handle data composed of definite quantities of current?
numerical value
RAM
digital computers
200 - 500-1000
45. What type of memory storage device is inexpensive and the data is stored serially (difficult to access)?
little
decreased
bus speed
magnetic tape
46. Changes in window width are sometimes called gray scale ____ or ____.
expansion or compression
edge enhancement filtering or sharpening
window level
central processing unit
47. What is the process used in low-pass filtering that is accomplished by averaging adjacent pixels values?
array detection
smoothing
1-2 lp/mm
RAM
48. What is the name of the 'modern electronic computer'?
32
numerical values
matrix
ENIAC
49. 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.
numerical value
smoothing
0 - 1
computer - radiographer
50. What is required for collection of input information?
high-pass filtering
detector
peripherals
digital image